MYSQL :: Slow Query Issue

Complicated SQL Query Issue
A little background on what I'm trying to do. I've got an ecommerce site and in that database are orders from users. I'm ultimately trying to get the total net profit of sales for each month (total sales - product cost). Just thinking about how to do the query is making my brain hurt.

Here are applicable tables/schema:

orders
order_num - The unique order number. This table holds other info pertaining to the customer (such as shipping/billing info), that doesn't really apply to this issue.
order_date - The date/time the order was placed (0000-00-00 00:00:00)

orderinv - There is one row for each product in an order
orderinv_product - The product id (matches with product_id)
orderinv_qty - The number of that product ordered
orderinv_ordernum - The order number (matches with order_num)
orderinv_price - The price they purchased the product at. This exists for an instance where they might have purchased the product on sale...it keeps their purchase price the same regardless of if we change the product price before we fill their order.

products
product_id - The product's unique id
product_wholesale - The price we paid for the product

I know how to do the query to get the net profit for each individual order, but what I can't figure out is how to get the total net profits for a single month.

I'm not sure what other info I should give here or where to even start.

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Slow Query Log
my slow log is catching a slow query, however the timestamp for the query is "0". I also placed a timestamp on the query to echo out to the results page, and it is about 4 thousands of a second. Why is it showing in the slow log?

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Slow Query Using NOT IN
I am migrating a MSSQL server to MySQL. I know the following SQL is valid for both servers, but MSSQL finishes execution of the query almost instantly, and MySQL has been running the query for the past ten minutes and still is not finished. There is basically the same amount of data in each database. Does anyone know ....

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Slow Query
i have this query on a website/webapp that has expanded beyond all expectation. It now takes nearly 30secs to return results from the database

SELECT cl_t.Client_ID, Buyer_1_Title, Buyer_1_Prename,
Buyer_1_Surname, Tel_No, Mob_No, Buyer_2_Title,
Buyer_2_Prename, Buyer_2_Surname, Email_Add,
Price_Max, MAX(activity_t.Date) AS lastcomm
FROM cl_t
INNER JOIN cl_want_t
ON cl_t.Client_ID = cl_want_t.Client_ID
AND Agency_Code ='$agencyloggedincode'
AND Deleted = 'N'
LEFT JOIN activity_t
ON Buy_Sell = 'B'
AND Ref_No = cl_t.Client_ID
WHERE cl_t.Sales_Agent_ID = $agentid
GROUP BY cl_t.Client_ID
ORDER BY $order
The problem is the call to MAX(activity_t.Date) AS lastcomm
activity_t holds all known contact with all known clients and as such is a very large table, the call to search through all of these records and return only the date of the last entry for this client is taking the time. If I remove this from the query I get results in 3 seconds.
I have indexing on activity_t.Date & activity_t.Ref_No
Question, is there a way of doing this quicker within the table I already have, or should I create another table that just holds the last update date for each client, and get the date from this much smaller table.

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Why Is This Query Too Slow?
I find this query to be exceptionally slow(around 2.5 seconds), could some tell me why this is so?

MySQL
SELECT st.profile_views,count( DISTINCT p.ID ) news_submitted, count( DISTINCT pv.ID ) news_voted, count( DISTINCT pcom.ID ) news_commented, u.joined, u.weight FROM users u LEFT JOIN posts p ON p.submitted_user_id = u.user_id LEFT JOIN post_votes pv ON pv.user_id = u.user_id LEFT JOIN post_comments pcom ON pcom.user_id = u.user_id LEFT JOIN stats st ON st.user_id=u.user_id WHERE u.user_id='john' GROUP BY u.user_id
I traced the cause to this line
count( DISTINCT p.ID ) news_submitted (from LEFT JOIN posts p ON p.submitted_user_id=u.user_id)
But when i execute something like this

MySQL
SELECT count( DISTINCT p.ID ) news_submitted FROM posts WHERE submitted_user_id='john'
it is quite fast (around 0.03 seconds)
So why does it slow down when i'm joining the above query with 3 other tables ?
Should i use INTEGER for user_id instead of string like 'john'?

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Slow Query->Efficient Query
I have a query that is running really slow !!!!
I have joined on Key fields and indexed the tables fully but it is still solw.
--------------------------------------------

select d.id, a.signed, u.Forename, u.Surname, d.paid, p.date, d.payment, p.amount, d.acctual
from details d
join poten a
on a.id = d.id
left join recieved p
on d.id = p.id
left join users u
on a.signed = u.userid
where d.paid > '01-Dec-2005'
and d.authorrceived is not null
and d.authorrefused is null
and ((d.payment starting 'E' or
d.payment starting 'e') or
(d.payment starting 'Q' or
d.payment starting 'q' and
p.target = '500'))
order by d.paid, a.signed, d.id

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Issue With Simple SELECT Query
i have three rows in my articles table. for some reason the query below does not show the first entry in that table, only the last two. is there an obvious reason why this would be the case? im displaying just the $title and the $id, simple enough! i can post database structure if required. stumped!

$queryGetArticles = "SELECT * FROM articles";
$resultGetArticles = mysql_query($queryGetArticles) or die ("couldnt get the data");
$row = mysql_fetch_array($resultGetArticles,MYSQL_ASSOC);

echo "<div id='stories'><ol>";
while ($row = mysql_fetch_array($resultGetArticles)) {
extract($row);
echo "<div class='story'><li><h3>$title (id: $articleID)</h3></li></div>";
}
echo "</ol></div>";

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Slow Query Log Not Staying On
I'm running MySQL 4.0.16 on Windows 2003. I just added the mysqld-nt
command line option to enable the slow query log, started MySQL, and the
option showed up as turned on. Then later I restarted the server, and the
slow query log option went back to being turned off. Is this a Windows
problem in not remembering the service parameter? Has anyone else seen
this?

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View Slow Query Log
I searched here, google and MySQL docs but did not find an answer.
I'm using MySQL-Front from a Windows platform to administer a remote database. The remote server doesn't have phpMyAdmin or anything like that.
MySQL-Front reports 133 Slow Queries and an average of 15 queries per second. But I dont' know how get more information than that.

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Slow Query Log Files
I have edited my.ini file to create a file called slow queries. My problem is that when the server starts up i do not get a full list of all slow queries. Is there anything else i need to change? How else can i come about in getting all queries that took a long time to execute? im using mySQL 5.0.9.

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Query Execution Too Slow!
I have migrated from MySQL 4.1.22 to MySQL 5.0.45. Many of the queries that were working on my old server is working too slow in my new server(MySQL version 5.0.45).

I am not aware why is this happening. Actually there is no error message or query failing. The query is executing, but the time taking to execute the query is too long. This problem is not occurring for all queirs, but only for some complex queires, that is queries with Left Join or Right Join, Group By etc.

I have also checked the MySQL details through SSH(that is by mysql> SHOW VARIABLES;)

Now one thing I found is there is lot of difference in key_buffer_size, table_cache, join_buffer_size, read_buffer_size, read_rnd_buffer_size , table_cache etc between my new server MySQL and old server MySQL.

Will this be the reason for query execution taking too much time.

Can any one guide me why this is happening. The striking thing is that these quires was working very much fine and faster in my old server.

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Recycling The Slow-query.log
Am using v5.0.22. log-slow-queries=/var/lib/mysql/log/slow-query.log, but this has grown to over 4GB. Can this slow-query.log file by recycled without starting the server? Meaning can I do the following: mv slow-query.log slow-query.OLD.log, followed by a touch slow-query.log WHILE the server is running?

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Slow Update Query
I have about 2000 update queries to do, which takes about 1 hr on 250,000 rows.
My table is getting kinda slow here is the query i am using
UPDATE nametable SET
sectionname = replace(sectionname,'".$oldsec."','".$sec."'),
categoryname = replace(categoryname,'".$oldcat."','".$cat."'), published=Ƈ'
where sectionname='".$oldsec."'
and categoryname='".$oldcat."' ;

I am wondering if the same thing is possible with an insert... on duplicate key statement?

I cant seem to get the insert statement to work, but not even sure whether it is appropriate.

With this query I am basically finding and replacing some columns based upon another table (within the php script I am using)

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Slow Query Execution
Right now I am fazing one issue which is getting hell out of me. I am explaining the issues step by step.

1.I have one site running from last 3 years with large database and there is one main table which has maximum load.

2.Now, I have redesigned the site with lots of changes within this table too.

3.The problem is that the server is same, queries are same but output in the new database is taking 50 times more execution time.

4.I also just copy paste the table, and fire the same query... Strange even that is not working...

Is it something where newly added table or database is having issues in the server?

I have tried all, compared the structures of the data and table but still the query result is too slow on live testing sever. While same query in main site of same server is running perfectly.

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Query With 3.3million Rows Is Slow?
I'm not that great with MySQL...so I was hoping someone could help me out.
The query I'm running is too slow...can anyone tell me what I can do to
speed it up..if I can at all? I was wondering if because ZipListMatrix has
3.3 million rows that 8 seconds is all the faster it's going to be. Any
help is greatly appreciated! I have already "optimized" the tables.

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Server Slow When Exec Following Query
i try to tweak mysql server but the process still very slow to exec o following query

exec time 2min for 11k row in two table

update uploaded,uploaded_job set uploaded.export = 'yes' WHERE uploaded.work_order =uploaded_job.work_order and uploaded_job.claim_status IS NULL

i had try indexing and optimise my database result still the same.

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Slow Query Wile Using Indexes
i am having a problem with a aparently normal query, i am using indexes and it is still very slow, as the table grows biger and biger i am afraid the system cant hadle it...

Here is the table data: ....

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Federated Tables Slow? (like 4.5 Hrs For A Query)
I've got a problem with federated tables. I'm using MySQL 5.1 (with InnoDB as the default table type) on a Win2K server, on which I've got four federated tables pointing at four MyISAM tables on a MySQL 4.1.11 server. Of the four tables, three of them run just fine, and I can retrieve data quickly with no problems. The fourth is a sheer pig. While they have different columns, all four tables are roughly as complex as each other, all having the same features and developed by the same team.

The most obvious difference, and what I suspect might be the problem, is that the first three tables have between 150 and 1,000 records, the fourth table has closer to 15,000. Still, there isn't that much lag when I'm pulling from the smaller tables, and the lag is really serious when I'm pulling from the larger one; I ran three queries last night to test, and I could pull data from the smaller tables in about 5 minutes, but the larger table took 4.5 hours- possibly because it was joined with two other tables, but the joins on the smaller tables didn't cause this kind of problem.

The second obvious difference is the fact that I'm pulling from a MyISAM table into a federated table... from which I would like to store into an InnoDB table, but it ends up timing out quite a bit.

Connecting to the database I've federated to isn't a problem. It responds to a PHP frontend lightning-fast. It's just my federated tables that suck so bad. I wouldn't even use federated tables, but I need to pull from the MyISAM database for storing historical records of inventory. What am I doing wrong, and what can I do to speed things up?

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Slow Inefficent Query (FIXED)
I have this query which pulls members from a table of 1200 members details, filtering out those without and email address and those that don't want Newsletters, and also any whose email address exists in a second table (emails that have hard bounced previously)

My first attempt took an age and returned about 10,000 members, clearly loads of repeated rows

My 'final' attempt with a DISTINCT shoved in works perfectly but is really slow, PHPAdmin says it takes 1.1s but on the website the data doesn't appear for over 30s, all the other sundry queries on the same table work nice and quick on the same website using the same php to generate the table of results

The googling I've done suggests (to me) that there's nothing wrong with the query but I suspect that there's far too much checking of fields going on from the pre DISTINCT query's results ....

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Mysql 5.0 - Using My.cnf - Unix / Slow-query-log
I installed mysql 5.0 and need to set up slow-query-log and other logging options.

Here is what I did. But I dont see it working yet.

1. cd /var/db/mysql
2. chown mysql slowquery.log
3. touch /usr/local/etc/my.cnf
4. chown mysql /usr/local/etc/my.cnf

vi my.cnf

[mysqld_safe]
-u mysql
--log-slow-queries=/var/db/mysql/slowquery.log

so now when I type:

mysqladmin shutdown
and than

mysqld_safe &
my sql restarts but the log files are not being used.
also - how do I know if my my.cnf is being used at all?

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Turning On Slow Query Logging?
Background: I paid a young admin set me up on a database server. He installed the basic I needed for the server...at my request...No Cpanel...mysql and apache and some tight security w/o even a domain name to SSH into. Unfortunately, he's a busy kid, and teens sometimes don't realize that people depend on them...and well, I can't really seem to get him to do much so I gave up and figured it's a good way to force me to learn all this myself...
Well anyway, now I want to turn on Slow Query logging. But before I do that, I need to know how MySQL is running. Is SQLogging turned on already? Where is it logging to? So first thing I want to look up is, when the server is rebooted, what's the command to restart mysql? No clue. How do I change the setting? And of course, the server is production, so when I make the change, it needs to be quick, it needs to be smooth, and I need to be able to roll back to the previous config if necessary.
I'm running Redhat Enterprise.

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Slow Query W/ Join & Ordering
I am trying to figure out why I have a hugely slow query (~2 seconds in my testing environment). Details are below:

It involves two tables, products and vendors.

Products is a huge table, so I will only include the (ostensibly!) relevant fields in its description:

CREATE TABLE `products` (
`id` int(11) NOT NULL auto_increment,
`vendor_id` smallint(6) NOT NULL default Ɔ',
`product_code` varchar(255) NOT NULL default '',
`internal_name` varchar(255) NOT NULL default '',
`lastmodified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,

PRIMARY KEY (`id`),
UNIQUE KEY `product_code` (`product_code`),
KEY `vendor_id` (`vendor_id`)
) ENGINE=MyISAM;
Vendors are much more straightforward:

CREATE TABLE `vendors` (
`id` smallint(6) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM;
The following query executes in no MORE than 0.01 seconds:

SELECT DISTINCT p.id
, p.product_code
, unix_timestamp(p.lastmodified) as lastmodified
, p.internal_name
FROM products as p
ORDER BY p.product_code ASC
LIMIT 0, 30;
And has the following attributes:

+----+-------------+-------+-------+---------------+--------------+---------+------+-------+-----------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+-------+---------------+--------------+---------+------+-------+-----------------+
| 1 | SIMPLE | p | index | NULL | product_code | 257 | NULL | 25124 | Using temporary |
+----+-------------+-------+-------+---------------+--------------+---------+------+-------+-----------------+
When I join with the vendors table, so that I can fetch the vendor's name for each product, I use the following query, which takes about 1.88 seconds:

SELECT DISTINCT p.id
, p.product_code
, unix_timestamp(p.lastmodified) as lastmodified
, p.internal_name
, v.name as vendor_name
FROM products as p
LEFT JOIN vendors as v ON v.id=p.vendor_id
ORDER BY p.product_code ASC
LIMIT 0, 30;
It has the following characteristics:

+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+---------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+---------------------------------+
| 1 | SIMPLE | p | ALL | NULL | NULL | NULL | NULL | 25124 | Using temporary; Using filesort |
| 1 | SIMPLE | v | eq_ref | PRIMARY | PRIMARY | 2 | te_inventory.p.vendor_id | 1 | |
+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+---------------------------------+
Note the addition of the filesort. I'm unhappy enough about the temporary, which I don't really understand, but the filesort is, I'm fairly sure, killing me.

Closer investigation (or maybe just common sense if you aren't a MySQL newbie like me) shows that the ORDER BY clause is responsible, for when I join without the ORDER BY, my query time goes back down to 0.01 seconds or so:

mysql> explain SELECT DISTINCT p.id
-> , p.product_code
-> , unix_timestamp(p.lastmodified) as lastmodified
-> , p.internal_name
-> , v.name as vendor_name
-> FROM products as p
-> LEFT JOIN vendors as v ON v.id=p.vendor_id
-> LIMIT 0,30;
+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+-----------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+-----------------+
| 1 | SIMPLE | p | ALL | NULL | NULL | NULL | NULL | 25124 | Using temporary |
| 1 | SIMPLE | v | eq_ref | PRIMARY | PRIMARY | 2 | te_inventory.p.vendor_id | 1 | |
+----+-------------+-------+--------+---------------+---------+---------+--------------------------+-------+-----------------+
Any clues on how I can get the execution time to go down when I am sorting? I'm also curious why MySQL is using a temporary table,

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Help Rewriting A Slow Phpbb Query
I have a "glance" or "Recent Topics" list on my forums that have become fairly complex. I modified an already feature rich glance mod to allow users to select individual forums to exclude from showing topics in the list. As well when users are members of certain forum groups, they see topics from the group forum in the list, and they are highlighted a different colour.

The main SQL query to create the list often is showing up in the MySQL Slow_query log and I'm pretty sure is the main cause for the page loading slow.

I am no mysql Guru, so I thought I would seek the advice of some to improve or totaly rewrite this slow query.

PHP

$sql = "SELECT
    f.forum_id, f.forum_name, t.topic_title, t.topic_id, t.topic_last_post_id, t.topic_poster, t.topic_views, t.topic_replies, t.topic_type,
    p2.post_time, p2.poster_id,
    u.username as last_username,
    u2.username as author_username
FROM "
    . FORUMS_TABLE . " f, "
    . POSTS_TABLE . " p, "
    . TOPICS_TABLE . " t, "
    . POSTS_TABLE . " p2, "
    . USERS_TABLE . " u, "
    . USERS_TABLE . " u2
WHERE
    f.forum_id NOT IN (" . $forumsignore . $glance_recent_ignore . ")
    AND t.forum_id = f.forum_id
    AND p.post_id = t.topic_first_post_id
    AND p2.post_id = t.topic_last_post_id
    AND t.topic_moved_id = 0
    AND p2.poster_id = u.user_id
    AND t.topic_poster = u2.user_id
ORDER BY t.topic_last_post_id DESC";
$sql .= ($glance_recent_offset) ? " LIMIT " . $glance_recent_offset . ", " . $glance_num_recent : " LIMIT " . $glance_num_recent;

The "NOT IN" list varies per user, but here is an example:
NOT IN (77,75,76,25,26,37,63,64,66,67,67,1,25,26,37,70,28,75,76,78)

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Can't Turn On Slow Query Logging
long_query_time = 1
log-slow-queries = /var/lib/mysql/slow_queries.log
Is the above syntax not correct for enabling slow query logging? All examples I've seen have the dashes in the second variable and underscores in the first.

When I restart MySQL with those lines in my.cnf, it fails to start, but writes nothing to its error log.
/var/lib/mysql/slow_queries.log exists, is owned by mysql, and has read/write permission.

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815,000+ Records, DB Table Query Too Slow
I have a database table with about 815,000 records in it, each record containing the source of individual webpages (with all the tags and multiple spacing stripped out leaving just the words). At first my match boolean queries were fine but once I got to around 100,000+ records it became too slow to use for a web-based search tool. I was able to separate the data into 10 tables and then use AJAX to run the match query on all 10 tables at the same time and that has increased performance.

My question is, is it possible for me to increase the performance for the 1 table some how instead of resorting to separating the data into multiple tables? Is MySQL the right DB for this kind of setup, would MSSQL or PostgreSQL perform better for larger sets of data? I'm not sure how MySQL 5 clustering works,

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Do Parallel Inserts And Selects Slow Down A Query?
I've been facing problems with a query which I think is relatively well optimized but has been performing really slow as of late as the size of the table has increased to more than 1GB. The MyISAM table is updated every few seconds, only a few rows, and a different set of rows are selected every few seconds.Wwould that cause a slowdown and if so, what is the solution?

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Large Table, Slow Query Question
I have a table with ~800,000 records. I need to grab random rows from the table based on certain criteria. The problem is that average lowest subset to grab the random row is around 200k. Here is what I'm trying to do:

There are 4 columns: data,n1,n2, and n3. I need to get the value of the data column based on criteria using the n1-n3 columns.

The most common query is SELECT data FROM table WHERE n1 = ?

The problem is that n1 can be only 1 of 5 possiblities. When the table is finished being populated there will be roughly 1.5 million records and 250k for each value of n1. Of course, I have an index on each n column.

Right now with just the 800k records it can take over a second, sometimes multiple seconds to run the following in order to get a random row from that subset:

SELECT COUNT(1) AS total FROM table WHERE n1 = 3;
index = random number from 1 to total
SELECT data FROM table WHERE n1 = 3 LIMIT index,1;

How can I speed this up? I need it to take less than half a second if possible. Thank you.

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Speed Up Query, Order By Column Is Too Slow!
I have a query that takes ages:

SELECT tbl1.a, tbl2.b
MATCH (tbl1.a)
AGAINST (
'someValue'IN BOOLEAN MODE
) AS score
FROM `a` , `b`
WHERE tbl2.b = 'someRestriction'
ORDER BY score DESC, b.tbl1 DESC LIMIT 20

but because there are thousands of rows it takes ages to do both of the orders, however just : ORDER BY score LIMIT 20 -- is really quick
and : ORDER BY b.tbl1 LIMIT 20 -- is really slow

is it possible rearrange a constantly updated database so that its naturally ordered by b.tbl1 (so there will be no need to do the ORDER BY b.tbl1 query each time), or are there any other methods to speed this up (putting it all in one table instead of 2, is that significant?)

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Slow SELECT Query INNODB Table
I have a couple hundred connections doing "SELECT [Char36 Field], [LongLong Field], [Long Field] FROM [Connection Specific Table] WHERE [NonIndexed VarChar36 Field]=[Value]". Notice that the table the select statement is being called on is unique to each connection. These tables have less than 10000 records, but this statement can sometimes take over an hour to execute.

It is an INNODB table.

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VER VERY VERY Slow MySQL Query HELP URGENTLY NEEDED
I have the following MySQL query, but it is VERY VERY slow and seems to be crashing the server. There are 300,000+ records in the 'tracker' table.

SELECT sites.*, SUM(if(tracker.type='view',1,0)) AS numberOfViews, SUM(if(tracker.type='click',1,0)) AS numberOfClicks, SUM(tracker.revenue) AS totalRevenue FROM sites LEFT JOIN tracker ON tracker.site_id = sites.id GROUP BY sites.id ORDER BY sites.domain_name

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Why Does The Slow Query Log Show More Rows Than Exist?
# Time: 070528 17:14:57
# User@Host: counter[counter] @ localhost []
# Query_time: 3 Lock_time: 0 Rows_sent: 7 Rows_examined: 120647
SELECT SQL_CACHE `webpageUrl`, `webpageName`, COUNT(*) AS `count`, (COUNT(*) / (SELECT COUNT(*) FROM _1_log)) AS `pct` FROM _1_log GROUP BY `webpageUrl` ORDER BY `count` DESC LIMIT 7;

mysql> select count(*) from _1_log;
+----------+
| count(*) |
+----------+
| 111824 |
+----------+
1 row in set (0.00 sec)

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Slow Execution For A Left Outer Join Query
Whats likely to be the cause of slow execution for a left outer join query?

The original query joins three tables but even if I narrow it down to one it still takes a long time to execute.

$query = "select distinct materials.* from materials";
$query .= " left outer join materials_products on materials.material_id = materials_products.material_id";

There's 914 rows in the materials table and 1348 row in the materials_products table

Is it likely to take a long time for this amount of data or is there likely to be a problem in the table(s) set up or query?

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Adjacent Theater Seats (was "mySQL Query Issue")
Having not been working with more than a simple SELECT * from table query, I am having a few issues when it comes to using more complex queries.

I am currently using a query to select seats from a database using the following query:

$query1 = mysql_query("SELECT struct.seatid, struct.row, struct.seatnum FROM seats as seat LEFT JOIN structure as struct USING (seatid) WHERE seat.showtimeid=".(int) $_GET['id']." && seat.available = Ƈ' && seat.timelimit < $minutes2 ORDER BY seat.seatid ASC");
For each record that is selected I want to check if either of the seats either side of it are also selected, if not then it is not to be shown.

I have added a while loop below the above query and run another query following it (not sure if that makes sense, so I will paste it below!)

while($rows = mysql_fetch_assoc($query1)){

$minusseat = $rows[seatid] - 1;
$plusseat = $rows[seatid] + 1;

$queryminusseat = mysql_query("SELECT * from seats LEFT JOIN structure WHERE seat.showtimeid=".(int) $_GET['id']." && seat.available = Ƈ' && seat.seatid == $minusseat && seat.timelimit < $minutes2");

$num_rows = mysql_num_rows($queryminusseat)or die(mysql_error());

echo "$num_rows";

//if($minusnum > 0){
//echo "$minusseat <b>" . $rows[seatid] ."</b> $plusseat <br/>";
//} else {
//echo "<font color=red>$minusseat <b>" . $rows[seatid] ."</b> $plusseat <br/></font>";
//}

}
The code above is used below the initial query and the following error is being displayed:

Quote:

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:Program Filesxampphtdocsprojectprototype1 ickets.php on line 154
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE seat.showtimeid=1 && seat.available = Ƈ' && seat.seatid == 1 && seat.time' at line 1

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"Recursive" Query Issue
I'm having problems creating a query. The table I want to query has three columns - unique ID (auto_increment), parent row ID and a data row.

I want MySQL to return all the rows which have ID x (defined in the query), and check its parent ID and return the row with the same ID than the previous row had as parent ID. And this should continue until parent is 0, when it would stop.

Is this possible in MySQL (I'm using MySQL 5) and how can it be done? I have tested using variables with no success.

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Max(id) Issue
I have a table that is set up as follows

id auto increment, reference varchar(20), value varchar(20)
1,passed,3
2,failed,888
3,total,10
4,failed,99
5,passed,900
6,total,3

I am looking to get the last value inserted into the table for each reference value. the result should be:

2,failed,88
4,passed,99
3,total,10

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SQL Issue
Had a question I can't seem to solve.

Here is the line I am having trouble with.
$query2 = mysql_query("UPDATE Users SET Totref += Ƈ' WHERE id = '$referral'") or die(mysql_error());

The exact part is the: SET Totref += Ƈ'

I think the problem is that I can not use += in that spot. How could I increase that value by 1 in a way that works?

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Issue 5.0.18 And Trigger
any issue with the version 5.0.18 of mySQL and using
triggers?Is there any troubleshooting for that kind of issue?

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Replication Issue?
My slave has been working fine up until now. Here is the error message.

030730 11:32:28 Slave: connected to master 'repl@xxxx.xxx.org:3306',
replication started in log 'SQLServer1-bin.034' at position 77571524
ERROR: 1062 Duplicate entry '120816' for key 1
030730 11:32:28 Slave: error running query 'INSERT INTO Assignments (
..........

Key 1 is CaseID

Database changed
mysql> select CaseID from Assignments Order by CaseID DESC Limit 3;
+--------+
| CaseID |
+--------+
| 120815 |
| 120814 |
| 120813 |
+--------+
3 rows in set (0.02 sec)

mysql> DELETE FROM Assignments WHERE CaseID = 120816;
Query OK, 0 rows affected (0.04 sec)

If I try to restart the slave I get the error all over again.

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Mysql_fetch_fields Issue
----------------
column1|column2|
---------------
1 | 2 |
----------------

Both columns are type int(11). And here's what I do:

sprintf(initial_query, "%s %s LIMIT 1", select * from", tablename);

if ((return = mysql_query(&dbmaster, initial_query)) != 0) {
exit(1);
}
if ((master = mysql_store_result(&dbmaster)) == 0) {
exit(1);
}
if ((master_fields = mysql_fetch_fields(master)) == NULL) {
exit(1);
}
master_column = mysql_num_fields(master);
//master_column = mysql_field_count(&dbmaster);
mysql_free_result(master);

for (i=0; i<master_column; i++) {
printf ("field %d type is %d", i, master_fields[i].type);
printf ("field %d name is %s", i, master_fields[i].name);
}

This is just a snippet. Every variable is declared correctly. Here,
as expected, I get 2 as the return value for mysql_num_fields or
mysql_field_count. However, in the for loop, I get weird values for
field type and get NULL for second column name:

Field 0 type is 134557680 Field 0 name is column1
Field 1 type is 3239533 Field 1 name is (null)

WHAT IS GOING ON? I am at a loss. Could this be a bug in MySQL?

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IN Nesting Issue
Any idea why i get an error when I run the below code. The union works fine and results in a single value but once I add the first 2 lines, the code fails. I am using MySQL 4.1. Is there a functionality limitation in the IN operator..?

select name from persons
where name in (
(select person from plays
group by person
having count(sports) >=10)
union
(select likee from likes
group by likee
having count(liker) >=10)
)

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CURRENT_TIMESTAMP ISSUE
Here’s the table structure:

Quote:
CREATE TABLE `test` (
`test` varchar(20) character set utf8 NOT NULL default '',
`timestamp` timestamp NOT NULL default '0000-00-00 00:00:00' on update CURRENT_TIMESTAMP
)
When I insert a row,
Quote:
INSERT INTO test (test)VALUES ('test')
timestamp doesn’t show current time, it shows the default '0000-00-00 00:00:00'.

What am I doing wrong?

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Script Issue
I have a linux script that wirtes a csv file for my mysql database table. Now its writing the csv file even if the tbale is empty? is their a way to check to see if theirs data first, if so write the file if not kill this part of the script?

Script

[script]
select * into outfile '/tmp/file2'
FIELDS TERMINATED BY ';' LINES TERMINATED BY 'N' FROM DIRECT_REFERRAL
[/script]

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Subquery Issue
I have a query at sql.pastebin.com/d3398502e and it's a bit of a monster (sorry, it says I can't post the actual link because I'm a new user, I assume it's a spam precaution, so please copy and paste).
It's a search query for a hotel site, like expedia, but it needs the ability to get different prices for children in a room based on their age.
Each hotel can have age groups, so it needs to figure out how many children are in each age group for that hotel (which works, that's all the UNIONs), and then apply the price associated with that age group to the number of children for that hotel for that date.
That's where I'm stuck since the price data for that date is not available in the subquery.
The way I have it now it's selecting all dates that have child prices applied and adding those together, rather than just the one date.

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Number Issue
I have this table:
CREATE TABLE `items` (
`no` tinyint(4) NOT NULL auto_increment,
`image` tinytext NOT NULL,
`title` tinytext NOT NULL,
`description` mediumtext NOT NULL,
`cost` tinyint(10) NOT NULL default '0',
`given` tinyint(10) NOT NULL default '0',
`priority` varchar(4) NOT NULL default '',
`active` char(1) NOT NULL default '',
PRIMARY KEY (`no`)
) TYPE=MyISAM AUTO_INCREMENT=4 ;

and I was manually inserting some test data via phpmyadmin, and in the cost item, i put 309, and it switches to 127. Is there something about tinyint that I don't know that would cause this?

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WHERE Clause Issue
I have a table with , name, address, telephone and date

date is DATE format.

I need to query selecting all information where date = (month)
how can this be done. I know date format is 0000-00-0. The (month) is selected from a form where a drop down has all months ie. <option value="01">january</option>. Im not sure how to make this work unless the query is between 20060101 and 20060131.

am i making any sense?
I would like to know how to do the where date=(month) part of the query please.

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Timestamp Issue
I am programming in PHP, and I have a timestamp which is being added to the database like " 2004-11-11 16:30:20" and I need to add 3 hours to it, and format it to something more ledgable like November 11, 2004 - 4:30:20.

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License Issue
planning on installing apache,php and MySQL into a company's server in order to provide a small database for the company. PLEASE,please someone help me to understand: DO I have to BUY a MySQL license (commercial) to do this?

Is MySQL free for usage? And If yes, then for who and which kinds of usage?

I read in GPL and it sais I think that except for being free to view and edit this open source product, you can distribute it for free, sell it or whatever u like.
Probably I could have misundestand. If someone is really aware of this legal part, pls answer.

thanks.

ps: 1. This will be used INTERNALLY of the company.
2. The source code will BE open and available to whoever wants it.
3. I will get payed for providing my services.
4. I have read GPL and Arjen Lentz's article "MySQL Network and you".

I have also read a LOT of the postings regarding this issue. But it's really difficult to get a clear straightforward answer.

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