sql-delete

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Improve performance of deletes on a table variable

I have seen performance tweaks for delete on normal tables in t-sql. But are there performance tweaks on deletes on table variables to be done?[详细]

2023-03-29 17:20 分类：问答
Mysql delete statement with limit

I\'m trying to delete rows from a table but I get an error. DELETE FROM `chat_messages` ORDER BY `timestamp` DESC LIMIT 20, 50;[详细]

2023-03-29 12:34 分类：问答
Slow self-join delete query

Does it get any simpler than this query? delete a.* from matches a inner join matches b ON (a.uid = b.matcheduid)[详细]

2023-03-29 03:01 分类：问答
Delete rows from several tables in one query

What is the proper开发者_运维问答 way to delete rows from several tables in one query? The reason I ask is because I am doing this with PHP.If I use multiple queries to delete from each table one at[详细]

2023-03-28 22:14 分类：问答
PHP hangs on MySQL delete statement

I\'m trying to delete one row of data from a MySQL database (innodb) in a PHP script. But instead of deleting, the PHP script hangs on the query. It\'s a very simple delete statement:[详细]

2023-03-28 16:22 分类：问答
Update a row and delete another one

I\'m trying to update a table wit开发者_运维知识库h values from another table. What I want to do is, each time an update happens, to delete the row in the table where I\'m getting the data from.[详细]

2023-03-28 12:04 分类：问答
SQL Server delete query involving two tables

So I have tables A and B in SQL Server, and columns a and b respectively. I want to do the following in pseudo-query command, but I can\'t seem to figure it out.[详细]

2023-03-28 00:27 分类：问答
MySQL Multi-Delete. Is it possible to multi-delete referenced rows?

If I have a parent table and a child table, is it possible to multi-delete the rows in them without having a \"ON DELETE CASCADE\" constraint?[详细]

2023-03-27 09:53 分类：问答
Moving information from one table to another and then deleting that data from its origin

I\'m making a roster creation tool and one part of the tool is to remove the graduated students from the roster pool and put them into another table called CompletedArchive. After they are copied to t[详细]

2023-03-27 07:28 分类：问答
Using MS Access finding duplicates and deleting them

I\'m trying to delete all duplicates from my database. I found the code below on this website. Problem is it deleted my entire database. Sadly I don\'t know enough about MySQL to tell why it got rid o[详细]

2023-03-26 21:52 分类：问答