sql-delete
Delete from one table with join
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
Mysql delete statement with limit
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
In SQL, is UPDATE always faster than DELETE+INSERT?
A bit too late with this answer, but since I faced a similar question, I made a test with JMeter and a MySQL server on same machine, where I have used: A transaction Controller (generating parent sample) that contained two JDBC Requests: a Delete and an Insert statement A sepparate JDBC Request containing the Update … Read more
How to write a SQL DELETE statement with a SELECT statement in the WHERE clause?
You need to identify the primary key in TableA in order to delete the correct record. The primary key may be a single column or a combination of several columns that uniquely identifies a row in the table. If there is no primary key, then the ROWID pseudo column may be used as the primary … Read more
How to delete in MS Access when using JOIN’s?
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
How to delete and update a record in Hive
As of Hive version 0.14.0: INSERT…VALUES, UPDATE, and DELETE are now available with full ACID support. INSERT … VALUES Syntax: INSERT INTO TABLE tablename [PARTITION (partcol1[=val1], partcol2[=val2] …)] VALUES values_row [, values_row …] Where values_row is: ( value [, value …] ) where a value is either null or any valid SQL literal UPDATE Syntax: … Read more
SQL DELETE with JOIN another table for WHERE condition
Due to the locking implementation issues, MySQL does not allow referencing the affected table with DELETE or UPDATE. You need to make a JOIN here instead: DELETE gc.* FROM guide_category AS gc LEFT JOIN guide AS g ON g.id_guide = gc.id_guide WHERE g.title IS NULL or just use a NOT IN: DELETE FROM guide_category AS … Read more
TSQL Try / Catch within Transaction or vice versa?
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
Best way to delete millions of rows by ID
It all depends … Assuming no concurrent write access to involved tables or you may have to lock tables exclusively or this route may not be for you at all. Delete all indexes (possibly except the ones needed for the delete itself). Recreate them afterwards. That’s typically much faster than incremental updates to indexes. Check … Read more