MYSQL :: Select From Table Where Fieldvalue != ""

Single Query For No Of Hits "Today", "This Month", "This Year"
Is it possible to construct a single query that fetches the no of pageviews "today", "this month", "this year" and "total since start"?

The table is very simple, one field for Date (YYYY-MM-DD) and one for the no of pageviews this day.

If not, would it be much slower/faster to divide the query into 4 different queries?

"Select * FROM" Vs "Select Field1,field2 FROM"
No matter how many fields I want to retrieve from the table I always use "Select * FROM Table" instead of "Select field1,field2 FROM Table".

Are there any disadvantages of always using "Select * FROM Table"?

Searching For Numbers - "close To" Or "approximate"
I would like to know how to search a table for records where a particular field is "close to" a particular number.

For instance, let's say I have a table containing students and their most recent test scores. I'd like to see students who scored 7/10. That's easy enough (select * from table where score = 7). I'd also like to run another query to identify other students whose scores are not 7 but "close to" 7. Ie students who scored 6 or 8.

As an added bonus, I'd like to be able to do a related search that shows students who scored 7, then shows the other students ordered by how "close" they are to 7. Ie students who scored 6 or 8 are "closest" matches, and students who scored 1 are "furthest". I hope this makes sense!

Is there any pre-existing MySQL command that will do this? Or will I have to run separate queries for each value?

REQ: MySQL 4.0 Equivilent Of "DateDiff("m", Date, Now())=1"
I have a query that works in the rest of the SQL world

"SELECT invoice.*, invoice.Date
FROM invoice
WHERE (DateDiff("m", Date, Now())=1);"

which will give me all of last month's invoices.

However it doesn't work with MySQL 4.0.

While

"SELECT
Invoice.*
FROM
invoice
WHERE
(Month(Invoice.Date) = ((Month(Now()))-1))"

Is a close substituent, it will blowup in January.

Anyone have an equivalent expression for MySQL 4.0?

How To Modify The "select" Function In The Source-code-version?
I have a source-code-version of MySQL at hand,and I want to modify the "select" function to optimize it.

The question is:how can I start? I wonder whether "select.cc" is the right file I can edit.

Select "german, French" Only With "german"
in a table I have this entry in the column "language":

"GERMAN, FRENCH"

how do i have to make/modify my mysql-syntax so that i can select the entry abowe only with the word: "GERMAN"? Is this possible or do i have to make a data manipulation first?

Can You Select And Concat Multiple Items Separated By "," ?
The select I have finds multiple values for a field. I want to take that field and create ONE field separated by commas.

Is that possible? I could do it in PHP but it will be easier programmatically if I can do it here.

For example:

HTML
Select field1 where x=2;
val1
val2
val3
val4
I want it to be like:

HTML
Select field1 where x=2;
val1, val2, val3, val4
where "val1, val2, val3, val4" is ONE field I can then use.

I am actually using this as a subquery so it's not as easy as php's explode/implode.

First And Last Time In Each Date By Empl (was "Help Me With This Select Statement")
I have the following table which has the following fields:

logid, empid, transdate,transtime

I want to select the first and last transtime in a specific date for every employee, how can i do that?

Dates In The Past 3 Weeks (was "SELECT Query Help")
I'm trying to select data from a table that has been submitted in the past 3 weeks. I am not having any success.

Best 4 Students From Each State (was "help With Select Statement In SQL")
I've got a database that contains names of registered students with the states they come from. I intend to select 4 each from every state that has the highest total scores. I use PHP and MYSQL database.

NAME STATE TOTAL Course
Simon Alabama 56 Computer Science
Mark Alabama 85 Electrical Engineering
John Washington 45 Computer Science
Linda Florida 99 Statistics
Fred Florida 23 Mehcanical Engineering

This is just an illustration of how the database looks like.

the sql statement should select the best 4 students from each state based on thier total scores.

"Unable To Select Requested Database."
i currenty run a game. Well just adding flies now and sorting it out etc..... but when i go to like online.php or anyother flie that the DB runs off.. i get "Unable to select requested database."

Value "000" Stored As "0" In Text Field?
I've managed to import my data from a CSV using SQLyog Enterprise, however, I have a problem with the table storing the text value "000", MySQL truncates it to "0", unfortunately, I need the value to be stored as "000", does anyone know of any way that I can force the field to store all the characters, rather than treating it as a number? Surely a text field should treat any numbers stored within it as text?

What Is The Meaning Of The Letters "AB" In "MySQL AB"?
What does "AB" stand for in "MySQL AB".

Return A "true" Or "false"
i wanna do a "select", where if the script finds any matches, i dont wanna know about them. Instead, i just want it to return a a value: true (1) ou false (0).

ie.:

$sth = $dbh->prepare("SELECT * FROM maps WHERE name='algo' LIMIT 1");
$sth->execute();

if (match is true) {
print "True Match. A match was found";
}
else {
print "False Match. No matches were found.";
}

"Group By" Forgets "Order By"
I'm trying to build a simple RSS reader for a client and am running into some serious problems with the GROUP BY in MySQL. Basically I have two tables: one that holds all the entries and one that holds all the feeds. Then what I can do is say:
[MYSQL]SELECT * FROM entries WHERE feed_id='13' ORDER BY date DESC[/MYSQL]
That will select all the entries that belong to feed #13. This is fine, but what I'm doing now is building a library that will display the feed_id with the latest entry with that id. So I would think it would be something like the following:
[MYSQL]SELECT * FROM entries GROUP BY feed_id ORDER BY date DESC[/MYSQL]
That should get me the single latest entry from each feed_id. However it's forgetting the ORDER BY clause all together and seemingly ordering it by the auto-incrememnt value in the entries field.

Select Where Four Of The Ten Fields Are Same (was "query")
I have a table with ten fields. Now I want to select * from table where four of the ten fields are same. How can I do the query?

MySQL "SELECT" Speed
I've read from MySQL's page about optimization, but still have two specific questions:

1) Let's say I do something like "SELECT * FROM table WHERE col1=val1". And, in this specific case, I know that any time col1=val1, that col2 will always equal val2. So, would it be any faster (or slower) to do: "SELECT * FROM table WHERE col1=val1 AND col2=val2"?

2) Does the order of the argument in the WHERE part affect speed? Ex: "WHERE col_index=val1 AND col=val2" versus "WHERE col=val2 AND col_index=val1"?

"select Into Outfile " Issue
I am running MYSQL 5.0 ON WINXP pro.

I have the following procedure:

SELECT Statement Using WHERE That Involves Value From "next" Row?
Is is possible to construct a SELECT statement that contains a WHERE
clause that uses the value from a column in the "next" row?

ie. given a table with a single field named "myField" with the
following values I want a SELECT statement that selects the rows
"WHERE myField='1' and [NEXT ROW]myField = '2' ":

5
6
1
2
1
3

Select Value Separated By Comma ","
how to select the value which separated by ',' or comma?

About "Select Count(*)" Always Returns 0.
my mysql version is:

Ver 14.7 Distrib 4.1.14, for pc-linux-gnu (i686) using EditLine wrapper

OS: uname -a
Linux backup_srv1 2.4.29 #4 SMP Thu Mar 24 10:31:26 CST 2005 i686 unknown unknown GNU/Linux

Desc:

My statement is
"SELECT COUNT(1) FROM t_card_info_035 WHERE Fcommodity_id = 0x1111 AND Fseller_uin =111111 AND Fdeal_id = 12345;"

my client is a daemon, when it started, it can return the correct result, (such as 4 ) but after two or three days later, it always returns 0. I had gdb into it and find that the result in the result row is 0. but when I restart my daemon program, it will be ok again. This made me crazy... it is a mysql c API bug or something else?

My daemon client is programmed by c++ , and use the c API to connect mysql. I had check that there is nothing wrong with my code, and it has no memory leak or somthing else.

Algorithm Of "select" Statement
As I have to access MySQL database in Pocket PC, I'm developing a
evc++ program to read and retrieve data from MySQL table.

Where can I get some detail information about how "select" and "where"
statements work in the format, index and data files of MySQL database?

Impossible "select Statement"
I have a table with 3 simple fields all 2 varchar 1 double.

distributor,manufactutrerssku,cost

I have several diffent distributors listed in my table and some of them carry the same manufacturers products so I am trying to find out which skus are available at more than one distributor and where the cost is best. This is simple enought to do in php but on a select line I am lost. Can this be done or is it impossible?

How Can I "see" A Table In A Database On A Remote MySQL Server After Creating It
I used the following SQL to create a new table in a database on
a remote MySQL server by copying one already there. I know the
table exists SOMEWHERE in cyberspace. I can read its data, write
to it, delete from it. But I cannot see it. The only way I know it
exists is by running this SQL from Access 97 pass through query:

SELECT ALL new_tbl.name FROM new_tbl

The database resides on a MySQL server that was created with
a single table (named test) in it for testing purposes. I ran the
following SQL to create another copy of the table in the same
database named: new_tbl

CREATE TABLE new_tbl SELECT * FROM test;

I cannot see the new table in the Access 97 database window
under the Tables Tab. Anybody know how to overcome this?

Its a severe drawback to programming efforts not to KNOW what
tables are in your database.

Multi-table UPDATE Problem (was "mysql Question")
$sql = "UPDATE char_lair , char_main m SET l.zip_id='$zip',
l.lair_addr='$address', m.alias='$alias', m.real_name='$name',
m.align='$align' WHERE m.id = $cid AND m.lair_id = l.id";

I am using mysql v.3.23, I got error in this code but can't find the solution.
The message displayed in browser is:
---------------------------------------------------
UPDATE char_lair , char_main USING char_lair l, char_main m SET l.zip_id='z3', l.lair_addr='a3', m.alias='ch3', m.real_name='rn3', m.align='good' WHERE m.id = 2 AND m.lair_id = l.idYou have an error in your SQL syntax near ' char_main USING char_lair l, char_main m SET l.zip_id='z3', l.lair_addr='a3'' at line 1
=========================================
Is there any syntax error?

"table Is Read Only" After Copying Table Files To New Server
I'm trying to port my MySQL tables for a database called "tracerlock" from
one server to another. On the old server, in the /var/lib/mysql/tracerlock
directory, there was a ".MYD", ".MYI" and ".frm" file for every table in
the database. So after creating a database called "tracerlock" on the new
server, I copied these files over to the /var/lib/mysql/tracerlock
directory on the new server. On both servers, all the table files are
owned by user "mysql" in the "mysql" group.

Now, when I connect to MySQL on the new machine and load the tracerlock
database, "show tables" shows all the tables as expected, and I can perform
SELECT statements on them and get the correct results. But when I try
doing INSERT statements on one of the tables that was copied over, I get:

mysql> INSERT INTO test VALUES(3);
ERROR 1036: Table 'test' is read only

However, if I create a new table called test2, I can perform INSERT
statements on it with no error:

mysql> insert into test2 values(3);
Query OK, 1 row affected (0.00 sec)

Code:

Please Explain MySQL Distinct Table Types (was "Where To Use ?")
These are the MySQL distinct table types.

MyISAM
MERGE
ISAM
HEAP
InnoDB
BDB or BerkeleyDB Tables

so please anyone help me to find out the use of each n every type.
it will be very helpfull for me if you people can provide simple meanings rather than technical.
For Ex : why to use MERGE over HEAP or something like this
Your help is most welcome

Search Script That Searches "linked" Table
I'm designing an ecommerce store, and I am on to the "search the site" script. I had a simple script set up, but its missing an important part of the search.

The way the (2 relevant) tables are set up are like this:

product_information
Field Type
ID int(10)
product_code varchar(30)
product_summary text
categoryID tinyint(3)

category_lookup
Field Type
ID tinyint(3)
category varchar(25)
parent tinyint(3)
product_code is the product's unique number, category ID refers to the ID of the category that product belongs to (socks, shoes, etc. etc.), and `categoryID` is equal to the category_lookup field `ID`.

What I would like to be able to do is if someone searches socks, any product that has 'socks' in the product_summary or the category it belongs to would be returned. Is this going to be too taxing on the server? I'm new to doing queries at this level so I can't put the query in to the proper syntax. Is there a way to do this all in one efficient query? Or since I'd have to do a lookup for each product in the database, would it be better to first check to see if any of the keywords are in the category_lookup table, and return the ID's if they are. Then I can include just those ID's in the where clause?

Alternate Solution To "intersect" In A Single Table...
I am having a problem getting my desired outcome with my table.

Table: orders

+-------+-------+------+------+------+------+---------+
| ordno | month | cid | aid | pid | qty | dollars |
+-------+-------+------+------+------+------+---------+
| 1011 | jan | c001 | a01 | p01 | 1000 | 450 |
| 1012 | jan | c001 | a01 | p01 | 1000 | 450 |
| 1019 | feb | c001 | a02 | p02 | 400 | 180 |
| 1017 | feb | c001 | a06 | p03 | 600 | 540 |
| 1018 | feb | c001 | a03 | p04 | 600 | 540 |
| 1023 | mar | c001 | a04 | p05 | 500 | 450 |
| 1022 | mar | c001 | a05 | p06 | 400 | 720 |
| 1025 | apr | c001 | a05 | p07 | 800 | 720 |
| 1013 | jan | c002 | a03 | p03 | 1000 | 880 |
| 1026 | may | c002 | a05 | p03 | 800 | 704 |
| 1015 | jan | c003 | a03 | p05 | 1200 | 1104 |
| 1014 | jan | c003 | a03 | p05 | 1200 | 1104 |
| 1021 | feb | c004 | a06 | p01 | 1000 | 460 |
| 1016 | jan | c006 | a01 | p01 | 1000 | 500 |
| 1020 | feb | c006 | a03 | p07 | 600 | 600 |
| 1024 | mar | c006 | a06 | p01 | 800 | 400 |
+-------+-------+------+------+------+------+---------+

What I am trying to do is list only the entries from cid that have both 'p01' and 'p02' in the pid column.

In oracle(sqlplus) I did it like this:

select cid from orders where pid='p01'
intersect select cid from orders where pid='p02';

Any TABLE TYPE Be Able To Save And Retrieve "Diagram"?
I'm seeking a solution that is able to:

1. Draw a diagram (such as an organization chart or cause-and-effect diagram) and fill nodes with related data.

2. Then, save the data and diagram into MySQL.

3. Finally, retrieve both data and diagram from MySQL and display them in corresponding places.

Limiting Fields In "show Table Status"
show table status like "products";

Sometimes this is too much information and I was looking for a way in MySQL to select only the columns you wanted to see like you could do with a select.

I know I can use PHP or Perl to parse this and output only what you want but wanted to see if there was a fairly easy
way to do so in MySQL. For example if I wanted to see the
Name, Rows, and Auto_increment fields only.

ERROR 1206 (HY000) At Line 41: "The Total Number Of Locks Exceeds The Lock Table Size"
I'm loading a large file into a table, and I get this error:

"ERROR 1206 (HY000) at line 41: The total number of locks exceeds the lock table size"

I already searched, and the only advice given was to do an explict full-table lock on that table before loading to avoid the row-by-row locks filling up the lock table. Well, I tried that, and it's not helping either.

Here's my log:

Table "hard Links" Under Windows
I am attempting to create "Symbolic" or as windows calls it "hard links" for some tables in a database.
I have 2 databases, db1 has a users table that I created a 'hard link' to in db2.
I created this using this program which ads shell intiration for hard linking: http://www.elsdoerfer.info/=ntfslink

The hard-link appears to work, I tested with a simple .txt file and i can make changes to one file and open the other and see them. The 2 databases were working fine for awile after I created these hard-links, then things started to go wrong.

It seems whenever I try to add a new row to the users table in db2 (with the hard-link) the change doens't show up in the same table in db1. It also corrupts the table. And same the other way, I added a bunch of users into the table in db1, then did a CHECK on the users table in db2 and it gives me this "Size of datafile is: 6872396 Should be: 6874300". So it seems part of the data is being written, since it knows what it should be.

I read that one can do this type of setup in linux with symbolic links, maybe it doens't work with windows hard-links? It seems it should... maybe i'm missing something?

Table Does Not Exist (was "Database Error")
Database error: Invalid SQL: update sponsors set status=-1 where end_date<=&#55614;&#57158;-07-22'
MySQL Error: 1146 (Table 'chinese.sponsors' doesn't exist)
Session halted.

What does this mean ?

Error In "create Table Keyword_relevance"
PHP

environment

mySQL4.0
win XP
codlFusion Server

The following code is basically fom http://r937.com/keyword_relevance.html.

<cfquery datasource='ds'>

create table keyword_relevance
( id tinyint not null primary key auto_increment
, Description varchar(99)
);
insert into keyword_relevance (Description) values
('I like to play games')
,('One game, two games, eh')
,('There''s no keyword')
,('The games keyword is present only once')
,('The games keyword is present only once in a longer sentence')
,('The games keyword is present only once in a really really really really really really long sentence')
,('Games games')
,('Games beautiful games')
,('')
,(null)
,('Games')
,('Games ')
,(' Games');

</cfquery>
The code above produces an error at http://dot.kr/test/01.cfm
The error occures maybe in "create table keyword_relevance"

What Does CREATE TABLE Phpbb_anti_robotic_reg Mean? (was "Mysql Help")
Hey im trying to install a hack onto my forum, which isnt really the important part. Ive done the steps until i come to the MYSQL part which reads the following:

Quote:

CREATE TABLE phpbb_anti_robotic_reg (
session_id char(32) DEFAULT '' NOT NULL,
reg_key char(5) NOT NULL,
timestamp int(11) unsigned NOT NULL,
PRIMARY KEY (session_id));

"hard" Sort Table Order
Is it possible to resort the rows in a table like in a query where using
ORDER BY, but have to new sort order stored in the table structure?

How Do I Restore A Table After Its Been "dropped" Using Phpmysql ?
what a tragic mistake i made by clicking on the "drop" button instead of the "empty" button. Now how can i restore that table?

"hard" Sort Table Order
Is it possible to resort the rows in a table like in a query where using
ORDER BY, but have to new sort order stored in the table structure?

Suspected DB Table "crash"
A table in one of DBs I believe has crashed (for lack of a better word).

No matter whatever I use to access it, PHP scrpt, PHP My Admin, SQLyog freezes when the table (PHPMyAdmin "freezes" when selecting the DB with the suspect table in it) is selected for repair, to analyze, or any other operation.

Is there anything I can do to "fix" this? I do not have SSH access to the server so that is a constraint.

1000 Tables, Or One Table? (was "Best Way To Do This?")
I have 1000 items that I want to keep daily stats on like number of downloads etc. Is it best to make 1000 tables, one for each item and make a row for each day or is it best to make one table with a row for for each item and use something like serialize to store the daily numbers?

"create Table" Speed
I'm wondering if there's any way to speed up create table queries?
Besides upgrading hardware, that is. The very simplest table creation
query, "create table table1 ( field1 INT(10))" is taking about .03
seconds, which compared to other queries (large inserts at .01 seconds)
and previous experience appears inordinately long. Further, it appears
that most of that .03 seconds is some kind of overhead, since the
complexity of the create table query appears to be irrelevant.

Running: Debian Woody with dotdeb packages.

Rename Table "bedrijf-2"
i export a access table to mysql 5 and named it 'bedrijf-2'

it is not related to any other table. I cannot delete it , rename it.
No delete or rename syntax worked. it gave the error about the -2.

can someone show me a way how to delete it?

"The Table Is Full" Error.
I have been looking through the logs for our content management system, and have found this error: "The table 'CMS_BACKUP_FILES' is full"

This is a table in the mysql database that is running on the same machine as our intranet. Can anyone help me resolve this issue as I have zero to limited MySQL experience and training.

"left Join" In One Table And Not In Another
I have three tables joined on key fields: delivery is joined with invoice_detail on delivery_id and with location on loc_id. I want to return records of deliveries that have corresponding records in the location table, but have no corresponding records in the invoice table.

Here's the query I'm attempting to use:

Select From Table Where Fieldvalue != ""

Does anyone know the MySQL Query for selecting all fields from a table where the fieldvalues do NOT equal nothing?