内部联接和删除不在mysql中工作

Question

我有两张表table1和table2。我想根据table1中的条件从table2中删除。

我有以下mysql查询：

DELETE FROM table1 
INNER JOIN table2 ON table2.col1 = table1.col1
WHERE table2.col2 = '1'

这会返回语法错误。上面的语法有问题吗？

Answer 1

您需要指定要删除的表格：

DELETE table1
    FROM table1 INNER JOIN
         table2
         USING (col1) 
    WHERE table2.col2 = '1';

Answer 2

试试这个：

DELETE FROM table1
WHERE EXISTS(
    SELECT 'C'
    FROM table2
    WHERE table2.col1 = table1.col1
    AND table2.col2 = '1'
)

Answer 3

您可以执行以下操作：

DELETE FROM table1 WHERE col1 IN (select col1 from table2 WHERE table2.col2 = '1');