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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Edit: Before anyone leaves this thread, don't be put off by the regular expressions! They are not the problem, so please stay and read. OK, this query has got my head spinning. I am basically creating a query that goes through each product in a table to update the stock for that particular item with that particular size (i.e. I am talking about shoes - different models and each model has different sizes (uk kids 12 -> uk 11). With each shoe it does (or is meant to do) the following: 1. The PHP script that runs the query is looping through every size outside of the query 2. So for each of these sizes it checks to see whether the product it is currently on matches the size it is on 3. When it finds the size it is on, it then deducts the correct number of units from the stock table 4. The final WHERE clause makes sure this subquery inside the UPDATE only happens when the StockUpdated field of the Product table equals 0 (in other words, the stock hasn't been counted before) Basically what I need to do, is first to make sure what I currently have got does the above correctly but also I need the query to UPDATE the StockUpdated field to 1 only when it has been updated successfully. How could I do this? Unfortunately I cannot just add an extra update entry to the end of the query as this would update the StockUpdated field regardless of whether it has been properly counted or not. Here is the query I have so far (with a little simple PHP around it doing the loop): PHP $shoesizes = array(1 => 'ukk12','ukk13','uk1','uk2','uk3','uk4','uk5','uk6','uk7','uk8','uk9','uk10','uk11'); $numshoesizes = count($shoesizes); for($i = 1; $i < $numshoesizes; $i++) { $stockupdate = " UPDATE heelys_stock,items_ordered SET heelys_stock.size_".$shoesizes[$i]." = (SELECT CASE WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?( )?(Kids)?( )?( )?(UK)?( )?( )?(Kids)?( )?( )?[^0-9]12( )?(' -- if UK Kids 12 THEN heelys_stock.size_ukk12 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?( )?(Kids)?( )?( )?(UK)?( )?( )?(Kids)?( )?( )?[^0-9]13( )?(' -- if UK Kids 13 THEN heelys_stock.size_ukk13 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]1( )?(' -- if UK 1 THEN heelys_stock.size_uk1 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]2( )?(' -- if UK 2 THEN heelys_stock.size_uk2 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]3( )?(' -- if UK 3 THEN heelys_stock.size_uk3 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]4( )?(' -- if UK 4 THEN heelys_stock.size_uk4 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]5( )?(' -- if UK 5 THEN heelys_stock.size_uk5 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]6( )?(' -- if UK 6 THEN heelys_stock.size_uk6 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]7( )?(' -- if UK 7 THEN heelys_stock.size_uk7 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]8( )?(' -- if UK 8 THEN heelys_stock.size_uk8 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]9( )?(' -- if UK 9 THEN heelys_stock.size_uk9 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]10( )?(' -- if UK 10 THEN heelys_stock.size_uk10 - (items_ordered.Amount/items_ordered.Price) WHEN SUBSTRING_INDEX(items_ordered.Product,',',-1) REGEXP '( )?(UK)?( )?[^0-9]11( )?(' -- if UK 11 THEN heelys_stock.size_uk11 - (items_ordered.Amount/items_ordered.Price) FROM items_ordered WHERE items_ordered.StockUpdated = 0) WHERE (heelys_stock.id = (SELECT heelys_stock.id FROM heelys_stock,heelys_shoe WHERE SUBSTRING_INDEX(items_ordered.Product,',',1) = heelys_shoe.full_shoe_name)) , items_ordered.StockUpdated = 1" // at the moment this last update of the items_ordered table happens to every record!!! even if the other part of query fails // update stock for size $i mysql_query($stockupdate); } Hope someone can see how I can do this? I've been working on this query for 2 or 3 hours now and I've been making reasonable progress but now I am really stumped.
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Update Query.
I have 2 tables. BOOKCHAPTERS (book_id,chapter_id) CHAPTERS(chapter_id,chapter_name,chapter_location) I want to be able to update the name (chapter_name) of chapters given a book_id. The chapter_id for each book is simply and auto-incremented column. I currently have the following queery which doesnt seem to work. Code: update chapters c, bookchapters bc set c.chapter_name = ?, c.chapter_location=? where bc.book_id = ? and c.chapter_id=? and bc.chapter_id = c.chapter_id; Now I know you're gonna say 'What's the value of all the prepared values' but I just want to know if the syntax for the query is ok.
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Update IN Query
Code: UPDATE SET COUNT=COUNT+1 IN WHERE SELECT sponsor,mstatus, count( username ) from customer Group by sponsor DESC Having count( username ) = 2
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Multiple Update In 1 Query
I am trying to do the following using PHP and Mysql: $sql=" UPDATE records set appear_order='2' WHERE id='19'; UPDATE records set appear_order='3' WHERE id='17'; UPDATE records set appear_order='4' WHERE id='18'; UPDATE records set appear_order='5' WHERE id='20'; UPDATE records set appear_order='6' WHERE id='16'; "; I am getting the following error message: " Cannot update records: 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 'UPDATE records set appear_order='2' WHERE id='19'; UPDATE recor" I don't know why this isn't working. when I paste this query to phpMyAdmin (I hope you guys know phpMyAdmin) - it works. somehow using a PHP code it does'nt - I get that error message. did anyone every come across this error and knows how to overcome it?
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Msql Update Query
I am trying to tie a mySQL UPDATE query to a variable in php to determine whether or not the query updated any rows or not. All it returns is whether or not the query was successfully executed. I have tried using the mysql_affected_rows() command, but as there are multiple users performing the same action this could lead to ambiguous results.
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Update Value Directly In The Same Query
Is it possible to update a value directly, adding text to it, without getting it first, adding the text in php and then do the update. for example: value in field users: ",45," and then adding ,34, to the field directly by doing something like: update table set users='users,34,' so the value in the field afterwards will be ",45,,34,"?
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Embed Sum() Within Update Query
I'm currently rewriting my website to work with MySql rather than MSSQL and have stumbled across a bit of a problem. Can anyone help? To create a simple example of what I'm trying to achieve - I have 2 tables. I wish to populate the SCORE in TABLEA with a sum of all SCORES in TABLEB where the CODE matches. TABLEA has a single row for each CODE but TABLEB may contain multiple rows (for different weeks).....
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UPDATE OR INSERT In One Query
Is there a way to UPDATE or INSERT a row into a table? Like: "UPDATE INTO table SET value1 = value1 + 1 WHERE uniquekey = $criteria", which will either update an existing row or create a new row, if the row doesn't already exist? The other way would be to check, if there's already a row for $criteria, and then either UPDATE or INSERT the data.
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Maximum Query Update?
Is there a maximum amount of fields that you can update at once as run from php the following works: UPDATE `members` SET `firstname` = '$formfirstname', `surname` = '$formsurname', `usrlevel` = '$formusrlevel', `usrname` = '$formusrname', `grade` = '$formgrade', `phone` = '$formphone', `email` = '$formemail', `comments` = '$formcomments' WHERE `ID` = '1' LIMIT 1 ; Yet the following does not and it only has one extra field to update: UPDATE `members` SET `firstname` = '$formfirstname', `surname` = '$formsurname', `usrlevel` = '$formusrlevel', `usrname` = '$formusrname', `grade` = '$formgrade', `phone` = '$formphone', `email` = '$formemail', `drivingdate` = '$formdrivingdate' `comments` = '$formcomments' WHERE `ID` = '1' LIMIT 1 ;
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Help With Mass Update Query
I have a field in my table (1000 records) called company_number. I've just been informed that all records that start with "1" should actually start with "0". So, for a record where compnay_number = 1000400 the number should actually be 01000400. Can anyone suggest how I would approach updating each record via one SQL statement? SELECT * FROM `myTable` WHERE `company_number` LIKE '%100%' ... then what?
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Stuck On Update Query
I am struggling with a SQL statement and hoped someone would be able to help customer_depots contacts Each table contain fields called 'customer_depot_id' and 'address_id'. What I want to do is update the address_id in the contacts table, with the value of the address_id in the customer_depots table, only where the customer_id values match in each table, AND the address_id in the contacts table is equal to zero. Does this make sense? So, update address_id in contacts, where address_id in contacts = address_id in customer_depots and address id in contacts = zero. This is because a number of address_id's are missing from the contacts table, and I want to replace them with the correspondingvalue from the other table. I have figured out a SELECT statement as shown below, but I need an UPDATE statement as explained above. SELECT cd.ADDRESS_ID FROM customer_depots cd, contacts con WHERE con.CUSTOMER_DEPOT_ID = cd.CUSTOMER_DEPOT_ID AND con.ADDRESS_ID = 0
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Select And Update In One Query
My remoteurl table has 3 columns: id, hits and url. PHP UPDATE remoteurl SET hits=hits+1 WHERE id=2 SELECT url FROM remoteurl WHERE id=2 Instead of using two queries I want to use one query which could select url and update hits column. Is it possible?
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Help Optimizing UPDATE Query
I have 1 query in my script that is taking waaaaay too much time. Is there a way that I can speed up or optimize this query? Right now the query is taking about 600+ seconds to update 500 rows. The Query PHP $update_from_sas_postmeta = "UPDATE wp_postmeta, sas_postmetaSET wp_postmeta.meta_value = sas_postmeta.meta_valueWHERE wp_postmeta.post_id = sas_postmeta.post_idAND wp_postmeta.meta_key = sas_postmeta.meta_key";$update_from_sas_postmeta_result = mysql_query($update_from_sas_postmeta) or die("MySQL ERROR (update_from_sas_postmeta_result): ".mysql_error()); The Tables CREATE TABLE `wp_postmeta` ( `meta_id` bigint(20) NOT NULL auto_increment, `post_id` bigint(20) NOT NULL default Ɔ', `meta_key` varchar(255) default NULL, `meta_value` longtext, PRIMARY KEY (`meta_id`), KEY `post_id` (`post_id`), KEY `meta_key` (`meta_key`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=294705 ; CREATE TABLE `sas_postmeta` ( `meta_id` bigint(20) NOT NULL auto_increment, `post_id` bigint(20) NOT NULL default Ɔ', `meta_key` varchar(255) default NULL, `meta_value` longtext, PRIMARY KEY (`meta_id`), KEY `post_id` (`post_id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ; Sample Data 2, 2, 'page_template', 'default' 3, 3, 'merchant_id', ?' 4, 3, 'merchant', 'SomethingSomething' 5, 3, 'link', 'http://www.website.com/link.html' 6, 3, 'thumbnail', 'http://www.website.com/thumbnail.jpg' More Details When the UPDATE query begins to run, the sas_postmeta table will have 500 records in it and the wp_postmeta table will have about 250,000 records in it.
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