Very Slow Update Statement

Update Too Slow
I need to update 25 * 5000 records, if I do one at the time it takes too
long time, do any one have a good proposal ?

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Slow UPDATE
I have a table with the following structure;

CREATE TABLE my_table
(
id_1 int(11) NOT NULL ,
id_2 int(10) NOT NULL ,
stauts tinyint(1) NOT NULL DEFAULT 0 ,
PRIMARY KEY (id_1)
) Engine =InnoDB';


The table currently has arround 100,000 entries. When I try to run variations of the following statement it is taking around 4 seconds per query;

UPDATE IGNORE my_table
SET id_1 = 74240, id_2 = 5

I need it to be running a lot faster than 4 seconds per query as I need to update upwards of 100,000 records a day! My server is fairly beefy, a 3 gig dual core opeteron and is generaly running below 1.0 load.

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Slow Update
The following query can sometimes take up to 2.5 seconds to execute on a table with only 150,000 records.
UPDATE items SET item_views = item_views + 1 WHERE id = 5897;
is there any way I could speed this up? Some setting I could change to make MySQL faster for this?
The field "id" is the primary table key.

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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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UPDATE Function Very Slow??
I have a large table (77,321 Rows) and I'm trying to update it. For some reason, UPDATE takes a long time. Maybe it's my query? I'm doing it through php, maybe that's it? I'm running the program locally using the CLI, and it still takes ages.

Should I not expect it to be as fast as SELECT functions?

$update ="UPDATE `ch_products` SET `products_weight` = '".$IDS[$i][Weight]."' WHERE `xref1` = '".$IDS[$i][ID]."'";

How can I make this faster?

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Very Slow Table Update
I have two tables. One is really a subset of the other. However, they came in different data files and I would like to pull data from one and put it into the other. However, it is VERY slow!

Once the tables are setup I will only read from them and perform operations. I will never update or insert. However, I can't get things setup to that point. Code:

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What Would This Update Statement Be?
I have an array of ids formatted like 1,2,3,4,5

I have a table where there is a field that selects maybe a few of those ids, and is formatted like this: 1,3,5

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Update Statement
I am using excel to update an online mysql table. I am having an issue with my update statement and I don't understand why. When I run the statement, I am getting a run time error. In the description of the error, the statement is reading as I would expect it to - but it is not working.

usqlstring = "(UPDATE company set company = '" & ucompany & "' WHERE prospect_id='" & updateid & "')"

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Update With If Statement
I'm trying a statement which I cannot figure out what I'm doing wrong on. I've tried every combination that I can think of and stared myself blue with no success.

update cdr set Cost=if(mod(BillSec,6)=0,int(BillSec/6),int(BillSec/6)+1)

The idea is to update Cost with a value depending on the result of a formula. It's an empty field which gets a computed value from other fields. cdr is the table.

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Update Statement
here is a update statement I have...

UPDATE support_test
    SET cat_id=42
    WHERE cat_id = 4

It works fine, only thing is I need to update more numbers but I don't want to overwrite the updated numbers.  Example, I want to update 42 to 6 but want to update the original 6's to 12. I have about 30+ numbers that need to be changed, any way to go about this?

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SQL-Update-Statement
I have to update all UA-fields in the table idrz_kennzahl with primary
key idrz, where the same idrz in the table per_verwaltung with the
field Amt=12 is.

I designed following statement but it doesn't work:

update idrz_kennzahl
set UA=1234
where
idrz_kennzahl.idrz =
(SELECT per_verwaltung.idrz from per_verwaltung where
per_verwaltung.Amt=12

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Update Statement
I am currently updating a table and increasing a column value by 1, the problem is that he don't increase 1 but it does increase the double of the value specified.
Why does it performs the update like this? And how can i solve this problem?

SQL Statement Syntax used: UPDATE table_name SET column_name=column_name+1 WHERE id=1

Version of MySQL: 4.1.7 for Windows installed in Windows 2003 Server.

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Update Statement
i have the following problem. in a table i have 3 columns. first a nvarchar field (6 characters) which is filled with point of sales (pos) numbers. the second one is an ip-adress like 10.192.17.30. the third column i want to create based on the second column, means i have to substract e.g. 3 of the ip-number. e.g. the ip-numer is 10.192.17.30 so in the third column should stand 10.192.17.27.

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Update Statement
I have two tables, and I want to take data from one table, and overwrite it onto the second. Unfortunately, my SQL is pretty weak.

The first table has a mediumtext column and a id (primary key) column. The second has an id (the same as the first), a number, and a mediumtext column.

I want to take the contents of the mediumtext field with the highest number and replace the contents of the field in the first column with it with the same id.

My instinct is to do it this way:

update forum1post p
set p.pagetext = (select query1.message
from (select pe.message, max(pe.editnum)
from forum1post_edits pe
group by p.postid) query1)
where p.pagetext = 'Why did you all flame my topic. Screw your ****ing forums.'
and p.postid = pe.postid

However, that does not work, as pe is not recognized.

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SQL-Update-Statement
I have a litte problem with my sql-database!
I have to update all UA-fields in the table idrz_kennzahl with primary
key idrz, where the same idrz in the table per_verwaltung with the
field Amt=12 is.

I designed following statement but it doesn't work:

update idrz_kennzahl
set UA=1234
where
idrz_kennzahl.idrz =
(SELECT per_verwaltung.idrz from per_verwaltung where
per_verwaltung.Amt=12).

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Update Statement
UPDATE `zipLocations` SET `z_zipCode` = '06001' WHERE `z_zipCode` =6001 LIMIT 1 ;

Field Type Attributes Null Default Extra Action
z_zipCode int(5) No 0
z_cityName varchar(50) No
s_stateAbbr char(2) No
z_countyName varchar(50) No
z_areaCodes varchar(50) No

I even went through phpmyadmin found the row clicked on the edit button for that row and updated it. and it still doesn't update.. im' thinking it has to do with the data type being INT...

Why doesn't it update it ?.. It says it was successful.
Affected rows: 0 (Query took 0.0002 sec)

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Update Statement
UPDATE products_to_categories SET products_to_categories.categories_id = 666
FROM products, products_to_categories
WHERE products_to_categories.products_id = products.products_id
AND products.products_model = 'PAC-P6512'

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Update Statement
Can someone please let me know what is wrong with the following statement?

UPDATE user_attribute, user
SET user_attribute.value = user.login
WHERE user_attribute.userid = user.id;

I keep getting a syntax error but don't see the mistake made.

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Update Statement
this works on my machine but not where my site is hosted. They do use an older version of mysql could that be problem

update inv, newprice set inv.cost = newprice.price where inv.itemcode = newprice.itemcode

works fine on my machine her ebut on server i get error..

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Conditional Update Statement
I have a table with a field of ID numbers. I want to update this field and replace the ID numbers. For example I want every record that currently has the ID number 2,5,6,or 9 to be replaced with a 1. Every record with 1 or 4 to be replaced with 2 ...

I can't seem to form the update statement to do this. I can do them one at a time but this won't work because if I change 2,5,6, and 9 to 1 then when I run then update for 1 and 4 it will change them all. Does this make any sense?

I want some way to be able to use a condition...if id=2 or 4 or 6 set it to 1 and if id= 1 or 4 set it to 2.

My failed attempt:

mysql> update client_software set software_id=1
WHERE (software_id=2 or software_id=5 or software_id=6 or software_id=9)
AND software_id=2 WHERE (software_id=3 or software_id=7 or software_id=8)
AND software_id=3 WHERE (software_id=1 or software_id=4);

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DELETE,UPDATE Or Other Statement In WHERE
I would like to let my admins write WHERE statements. . In panel where you can see all users of my site, admin should have input where he can put some filters in WHERE statment. E.G. standard query is
SELECT login FROM USERS .
and admin would write age > 18 and male = 'f'
. php script would conact it and it would execute
SELECT login FROM users WHERE age > 18 and male = 'f'
I have question about security of this solution. Is possible to put in WHERE statement sobe dangeurous statemetns like DELETE of UPDATE?

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Update Statement Problem? Plz Help.
I've a simple doubt of whether can or can't i update two tables by using joins as below. the below update statement matched 2 rows one each for two tables but didn't update.

mysql> update audio join pcr_info on audio.audio_sid=pcr_info.pcr_sid set audio.
audio_pid=4896,audio.audio_prgm_num=3,audio.audio_type="MPEGLayer1",audio.audio_
sr=44.1,audio.audio_mode="1_0",audio.audio_bitrate=320,pcr_info.pcr_pid=49 where
pcr_info.pcr_prgm_num=3 and pcr_info.pcr_sid="2501" and audio.audio_pid=4896 an
d pcr_info.pcr_pid=49;
Query OK, 0 rows affected (0.00 sec)
Rows matched: 2 Changed: 0 Warnings: 0

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Special UPDATE Statement
UPDATE some_table st SET some_page_no=((select count(*) FROM some_table WHERE some_table_id<st.some_table_id and some_id=st.some_id and some_type='OK') div 10)+1 WHERE some_id=345 and some_type='OK'

I want to use the above to make a fast page index (10 on each page). I had something similar in mssql and it worked, but in myssql I get this error:

"You can't specify target table 'some_table' for update in FROM clause"

What have I done wrong or can the above simply not be done?

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Select + Update In One Statement
I have these statements.

$selectdata = "SELECT * FROM imagetrack WHERE fimsid = ".$_GET["fimsid"]." AND name = '".$_GET["service"] . "'";

$query = mysql_query($selectdata) or die(mysql_error());
$update = "UPDATE imagetrack SET seen = seen+1 WHERE fimsid = ".$_GET["fimsid"]." AND name = '".$_GET["service"] . "'";

Basically i was wondering if there was a statement where i can select everything and update the seen in one statement.

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Conditions In UPDATE Statement
i have some data to be updated in a specific row - WHERE id=1

data:
$min_time, $max_time, $time, $attempts

so, i would like to calculate new avg and replace min_time with new value, if new min_time is smaller then that one stored in the database.

"UPDATE mytable SET
avg=(avg*attempts+$time) DEV (attempts+1),
min_time=**here i could use help** ??IF(min_time>$min_time)$min_time ELSE min_time??
**and similar with max_time .

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Select And Update Statement
Is it possible to combine a select and update statement in mysql? If
so, what is the syntax.

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SQL Statement For A Selective Update
I have a table with a field called 'imagepath', in this table is data represented by the two following path types:
1. J:DIRDIRDIR
and
2. 172.21.2.7DIRDIRDIR
What I need to do is udpdate the data to represent the following:
172.21.10.1DIRetc.

In other words don't update the dir paths just update the mapped dirve and old unc to the new unc.

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UPDATE Statement Doesn't Work
TABLE - abc

ID NAME
___________
1 hello
12 abc


UPDATE `abc` SET `ID`='5' AND `NAME`='hello' WHERE `ID`='1' AND `NAME`='hello'

wherenver I try to update this table using above sql statement, it doesn't work. I just get "Row match:1 Changed:0" message.

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If Condition In Update Statement
I have a table with three fields - stockLevel, backOorder and allocated (there are other fields but these are the inportant ones here).

Is it possible to create a SQL update query that will deduct a qty from the stockLevel if there is sufficient stock and if not deduct as much as possible and put the this amount on allocated and the remainder on backOrder?

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Long Old UPDATE Statement
I have the following SQL which gives me the row Im after

SELECT *
FROM staff, staffemails
WHERE staff.users_username='$user'
and staff.staff_id = staffemails.staff_id

thing is I now want to perform an update on the result of this query. Ive tried

UPDATE staffemails
SET is_registered ='0'
WHERE staff.users_username = '$user'
and staffemails.staff_id = staff.staff_id .

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UPDATE / JOIN STATEMENT
i have problems after updating mysql from 4.x to 5.0.19. This statement should update about 3000 rows but it only does 15 but there are definitely another 2000 rows with an older date and matching nr!

UPDATE tab1,tab2
SET tab2.newdate = NOW()
WHERE tab1.nr=tab2.nr;

I tried the variation with inner joining tab1 as well. same result.
Does anyone has an idea solving this problem? Perhaps it´s a bug?

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Update Statement Not Working
Why does this simple update statement not work with a mysql version 3.23.49,
it does work when using 4.0.24..... ?

UPDATE listitem,vjbase,list SET listitem.showsec = 7 WHERE listitem.id_vjbase = vjbase.vjbase_id AND listitem.id_vjbase = 3 AND vjbase.id_viduser = 61000 AND listitem.id_list = list.list_id AND listitem.id_list = 1 AND list.id_viduser = 61000

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MySQL/PHP - SQL UPDATE Statement
I am trying to update one field in my table in MySQL.  I cannot get this field to update.  Can someone possibly tell me what is wrong with my SQL statement?

$SQL="UPDATE umcritsurv SET IQ_Use_Q9='$IQ_Use_Q9' WHERE fldAuto='54'";

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Help With Simple SQL Statement To Update Zipcodes
I have a varchar(5) field in a database called 'zip_code'. I imported some zipcodes from an Excel spreadsheet, but the spreadsheet had truncated any zipcode that started with a "0" and removed the zero, so the correct zipcode of "08993" was incorrectly placed into the record as "8993".

Would someone help me write a SQL statement to run on the field zip_code that would look at the data, if it was four characters long, add a "0" to the start and keep the remaining four characters in place?

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QUERY One Table And Update Another In ONE Statement?
ZIP_CODE:
zip_code
latitude
longitude

customers:
customer_id
...
zip_code
latitude
longitude

The lat and long in the customers table is blank. I want to lookup customers' zip code in the ZIP_CODE, get the related lat & long and update the customers table with that information. The result being that after this query is run, the customers table now has lat & long data.

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UPDATE Statement To A Single Position
I am running into problems trying to write SQL to update a single position within a field for throusands of records.

Thousands of records on a table have an incorrect number in a field (UIDY) and I am looking for the most simple way to update them all.

If it were only a single record, I would execute the following:
Update MF_VEND_ADDR_DOC set UIDY = '&4027&7608&7607&1609&VC19&VC19000055&&0&999&M' where UIDY = '&4025&7608&7607&1609&VC19&VC19000055&&0&999&M'

The only difference in those two lines is that I want to change the &4025& to &4027&.  

Does anyone know of a way to update thousands of similar records by updating the 5th position in the UIDY field, thus eliminating the need to list out each UIDY value?

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CASE Statement In Update Command
I'm trying to update one table (tbl_usage) based on information from another table (tbl_subscriptions) joined by the userID. The usage table tracks the number of times a user hits a page, and decrements the count each time. When the user has a zero count, they are redirected to a warning page.

Each week the count is reset depending on what type of license they have (licenseType) and how many of those licenses they've bought (numLicenses). A group license (G) gives them 100 hits, and an individual license (I) gives them 5 hits.

I'm trying to use a case statement to perform this count reset operation, but I can't seem to get it to work. The following case statement works just fine: Code:

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Convert A Nested Update Statement
i have a nested update statement in my sql server as follows
UPDATE DIM_EVENT .

SET INVOICE_AMOUNT =
(SELECT SUM(INV.INVOICE_AMOUNT_TOTAL)
FROM INVOICE INV
WHERE INV.INVOICE_REFERENCE_NUMBER = DIM_EVENT.OBJECT_ID
AND INV.INVOICE_AMOUNT_TOTAL IS NOT NULL)
WHERE DIM_EVENT.EVENT_TYPE_CODE IN ('OFULN', 'OAUTH', 'CRDRL');
what is the equivalent in MySQL.

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Nested Select In Update Statement
my nested Select-Update-Statement doesn't work. I think it's because the SELECT-Statement returns an empty set.. is there a posibillity to run this statement if there is no empty set and insert NULL if it is? Or is there another error at all?

CODEUPDATE proj_user_suche SET acronym = (SELECT name FROM acronym LEFT OUTER JOIN link_acronym ON acronym.id_acronym = link_acronym.id_acronym WHERE projekte_nr="23") WHERE id_proj_user_suche="17"

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Convert SELECT Statement To UPDATE
How do I convert the following SELECT statement to UPDATE statement? If I'm not mistaken, UPDATE statement could not involve more than one table.

SELECT * FROM F0116 LEFT JOIN F0101 ON F0116.ALAN8=F0101.ABAN8 WHERE F0116.ALCTR='' AND F0101.ABMCU='1'

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MySql Update Or Insert Statement To Modify A Word In All Caps
I have a field in my database called Subtopic. In this field I have a word LITERATURE in all caps. I need to change the word LITERATURE to LITERATURE followed by a colon then an empty space. Can someone give me the MySql statement I can paste into phpMyAdmin to make this change? Note: The Subtopic field contains the word "literature" but not in all caps because the Subtopic field is part the database that is an encyclopedia. Therefore, I want to change ONLY the word LITERATURE if the word LITERATURE is in all caps.

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Slow
What generally would be the reason why all my db driven sites are running slowly or even hanging. I am on braodband speed but just changed hosts.

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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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Slow Authentication
MySQL V 5.0.18 on SUSE 10.1

I'm not a complete *nix noob, but I sure as hell ain't a *nix or MySQL pro.

This is a new installation. Everything screaming fast. Unless it deals w/authentication.

Try to get in w/SQLyog from W2K locally ... intitial connection takes ~20 seconds. Then everything screaming fast.

Web Server (W03) attempts to connect via MyODBC ... same result ... initial connection takes ~20 seconds. Subsequent queries screaming fast.

VNC into the box at any time ... everything fast. (would seem to eliminate network/connection issues)

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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 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 Subselect
I've got two tables:
lo_users: nickname|id|...
lo_friends: from|to|...

The following query takes < 0.01 sec:
SELECT IF(`from` = '10855', `to`, `from`) userid FROM lo_friends WHERE (`from` = '10855' OR `to` = '10855') AND STATUS = '1'

...but if I use it in a subselect, the whole thing takes about 0.54 sec:
SELECT u.nickname FROM (SELECT IF(`from` = '10855', `to`, `from`) userid FROM lo_friends WHERE (`from` = '10855' OR `to` = '10855') AND STATUS = '1') f LEFT JOIN lo_users u ON u.id = f.userid

What can I do to make the query faster? "from" and "to" are indexed and lo_users.id is the primary key.

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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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MySQL Slow
I had downloaded a few years back mySQL v3.51 installed but never used it. Now I wanted to convert some B-TREE databases to mySQL and did some testing via ODBC to insert 70,000 records: My results:

MS ACCESS: ~60,000 msecs
MYSQL v3.51 ~18,000 msecs

Impressed with the speed, I went ahead and got the latest MySQL v5.1. Uninstalled the older version, I had nothing there to preserve, so I did a simple new install with MySQL v5.1. I noticed the size of the files and BINEXE increasted by 1,000,000%. Ok, Bulky. Not a problem.

I reran the same ODBC test, and now I got:

MYSQL v5.1: ~450,000 msecs or 7.5 freaking MINUTES!

What the hell happen? Nothing was done. I'm knew to MYSQL. I just installed it with all the defaults. I did choose "developer's machine" for the "optimizer wizard"

I can't redistribute MYSQL v3.51 and force it down people's throats! I have to use what they are using already, if already installed. Not even my current system takes 1 minute to add 70,000 records. Why 7.5 minutes? All it is simple inserts/free statements.

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