Question

I am having some trouble with a MySQL query. I have a field in a table called “ID”, I want a query that deletes all rows in that table unless they have a certain ID, I want more to be able to define more than 1 ID in the query.

Any ideas?

Answer 1

DELETE
FROM yourTable
WHERE yourID NOT IN (1,2,3,4) -- place your list here

Or of you do not want to list your ids, you can use a subquery which would contain the list of ids you want to keep:

DELETE
FROM yourTable
WHERE yourID NOT IN (SELECT * FROM yourTable WHERE ...)