SQL Delete with Subquery

问题

I'm trying to delete from a table with the results of a subquery. The results return a unique tuple, and currently I end up deleting more than just the results returned because i'm only checking col1 results.

DELETE FROM Table1 exTable
WHERE exTable.col1 = ... AND exTable.col2 = ...
(SELECT col1, col2
FROM ...)

回答1:

Use a join to match more than 1 column.

DELETE t1
FROM Table1 t1
inner join 
(
   select col1, col2 
   from other_table 
   where ...
) t2 on  t2.col1 = t1.col1 
     and t2.col2 = t1.col2

来源：https://stackoverflow.com/questions/17448044/sql-delete-with-subquery