MySQL delete multiple rows in one query conditions unique to each row

问题

So I know in MySQL it's possible to insert multiple rows in one query like so:

INSERT INTO table (col1,col2) VALUES (1,2),(3,4),(5,6)

I would like to delete multiple rows in a similar way. I know it's possible to delete multiple rows based on the exact same conditions for each row, i.e.

DELETE FROM table WHERE col1='4' and col2='5'

DELETE FROM table WHERE col1 IN (1,2,3,4,5)

However, what if I wanted to delete multiple rows in one query, with each row having a set of conditions unique to itself? Something like this would be what I am looking for:

DELETE FROM table WHERE (col1,col2) IN (1,2),(3,4),(5,6)

Does anyone know of a way to do this? Or is it not possible?

回答1:

You were very close, you can use this:

DELETE FROM table WHERE (col1,col2) IN ((1,2),(3,4),(5,6))

Please see this fiddle.

回答2:

A slight extension to the answer given, so, hopefully useful to the asker and anyone else looking.

You can also SELECT the values you want to delete. But watch out for the Error 1093 - You can't specify the target table for update in FROM clause.

DELETE FROM
    orders_products_history
WHERE
    (branchID, action) IN (
    SELECT
        branchID,
        action
    FROM
        (
        SELECT
            branchID,
            action
        FROM
            orders_products_history
        GROUP BY
            branchID,
            action
        HAVING
            COUNT(*) > 10000
        ) a
    );

I wanted to delete all history records where the number of history records for a single action/branch exceed 10,000. And thanks to this question and chosen answer, I can.

Hope this is of use.

Richard.

来源：https://stackoverflow.com/questions/14904067/mysql-delete-multiple-rows-in-one-query-conditions-unique-to-each-row

标签

mysql

unique-constraint

multiple-records