Mysql query to Delete records after select..? [duplicate]

问题

This question already has answers here:

MySQL Error 1093 - Can't specify target table for update in FROM clause (15 answers)

Closed 2 years ago.

after selecting records i want to delete that records..i tried following query - (after removing ,MAX(value) but its showing- You can't specify target table 'test' for update in FROM clause

DELETE FROM test WHERE ext_no IN 
(
SELECT   ext_no, MAX(value)
FROM     test
GROUP BY ext_no
HAVING   COUNT(*) > 2 AND 
         COUNT(*) = COUNT(CASE value WHEN 0 THEN 1 END)
);

回答1:

You can try below - you need to use subquery for inner select statement

DELETE FROM test WHERE ext_no IN 
(
select ext_no from
(
SELECT   ext_no, MAX(value)
FROM     test
GROUP BY ext_no
HAVING   COUNT(*) > 2 AND 
         COUNT(*) = COUNT(CASE value WHEN 0 THEN 1 END)
)t)

来源：https://stackoverflow.com/questions/53370339/mysql-query-to-delete-records-after-select