I like CTEs and ROW_NUMBER as the two combined allow us to see which rows are deleted (or updated), therefore just change the DELETE FROM CTE… to SELECT * FROM CTE: WITH CTE AS( SELECT [col1], [col2], [col3], [col4], [col5], [col6], [col7], RN = ROW_NUMBER()OVER(PARTITION BY col1 ORDER BY col1) FROM dbo.Table1 ) DELETE FROM … Read more
Delete Table1.* From Table1 Where Exists( Select 1 From Table2 Where Table2.Name = Table1.Name ) = True To expand on my answer, the official SQL specification does not provide for using Joins in action queries specifically because it can create ambiguous results. Thus, it is better (and Access is much happier) if you can avoid … Read more
You cannot specify offset in DELETE‘s LIMIT clause. So the only way to do that is to rewrite your query to something like: DELETE FROM `chat_messages` WHERE `id` IN ( SELECT `id` FROM ( SELECT `id` FROM `chat_messages` ORDER BY `timestamp` DESC LIMIT 20, 50 ) AS `x` ) Supposing that you have primary key … Read more
Arranging proper cascading deletes is wise and is usually the correct solution to this. For certain special cases, there is another solution to this that can be relevant. If you need to perform multiple deletes based on a common set of data you can use Common Table Expressions (CTE). It’s hard to come up with … Read more
Calling DELETE FROM TableName will do the entire delete in one large transaction. This is expensive. Here is another option which will delete rows in batches : deleteMore: DELETE TOP(10000) Sales WHERE toDelete=”1″ IF @@ROWCOUNT != 0 goto deleteMore
You can use HQL for truncate table public int hqlTruncate(String myTable){ String hql = String.format(“delete from %s”,myTable); Query query = session.createQuery(hql) return query.executeUpdate(); }
I am not sure about your requirement. What I understood from your question is you want to delete all the emails of jobs which are closed. try this one; DELETE e FROM emailNotification e LEFT JOIN jobs j ON j.jobId = e.jobId WHERE j.active = 1 AND CURDATE() < j.closeDate
Only open a transaction once you are inside the TRY block and just before the actual statement, and commit it straightaway. Do not wait for your control to go to the end of the batch to commit your transactions. If something goes wrong while you are in the TRY block and you have opened a … Read more