sql-delete

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How do I merge two tables in MySQL and where table 1 is primary

How do I merge two tables in MySQL? I\'ve looked at several other posts on this topic but they don\'t go into enough detail for me.[详细]

2023-03-10 23:38 分类：问答
Functions on Save, Edit, Delete button

Please help me what codes to put on save, edit, delete buttons. I created an employee information management. Also how to integrate this button to my database (mysql). Example when I click save it wil[详细]

2023-03-10 01:53 分类：问答
JDBC statement fails to delete row in specific MySql table

I have a table, say example1 and I\'m using a jdbc statement to delete one of its rows. I have tried various methods, from delete from example1 where id = 1 to statement.addbatch(sql) but it does not[详细]

2023-03-09 20:50 分类：问答
How to find the time of a row updated into a table in Sql Server 2005?

Is it possible to find the time when the row was updated into a table. For Example IDNAMECOURSE ------------------[详细]

2023-03-09 00:34 分类：问答
Recoved deleted rows in postgresql

After running a query like delete from table tablename Can the records be recovered? From what I know Postgresql is开发者_开发百科 just marking the records as deleted.Try pg file dump.[详细]

2023-03-08 15:35 分类：问答
Delete rows following a duplicate

I have a list of user login and logout stamps. Unfortunately a LOGIN entry might not always be followed by a LOGOUT entry.[详细]

2023-03-08 11:48 分类：问答
how to delete records from several child tables in the same query

I ve got a database model开发者_如何学Goize like this, One mother table let\'s call it table_mother, and severals child tables.[详细]

2023-03-08 07:17 分类：问答
MySQL LIMIT on DELETE statement

I put together a test table for a error I recently came across. It involves the use of LIMIT when attempting to delete a single record from a MySQL table.[详细]

2023-03-08 05:39 分类：问答
Nested Delete in MySql based on Timestamp

I have a database containing all the content updates for a CMS driven website.I want to create a query that will clean out all the old stuff, but leave me the most recent few (5) copies of each page ([详细]

2023-03-08 03:22 分类：问答
How do I delete duplicate rows and keep the first row?

I made a mistake and I have unwanted duplicates. I have a table with 4 key fields. A1, k1, k2, k3. A1 is auto increment and the primary key.[详细]

2023-03-07 17:50 分类：问答