如何根据一个表中的特定值从3个表中删除行

Question

Helo Folks，

我有3张桌子。 A，B，C。

我在表A行中列有＆＃39; date＆＃39;有价值＆＃39; 2000-1-1＆＃39;。

我想根据where A.date = '2000-1-1'从 3 表中删除行。

考虑join on A.ID = B.ID ..或表之间的某种其他类型的连接。

Answer 1

您不能对3个表发出单个delete语句，但可以在一个事务中对3个不同的表包装3个delete语句。

BEGIN TRANSACTION

    DELETE FROM TABLE_A
    WHERE EXISTS (SELECT 1
                  FROM Table_X X
                  WHERE TABLE_A.ID = X.ID)

    DELETE FROM TABLE_B
    WHERE EXISTS (SELECT 1
                  FROM Table_X X
                  WHERE TABLE_B.ID = X.ID)

    DELETE FROM TABLE_C
    WHERE EXISTS (SELECT 1
                  FROM Table_X X
                  WHERE TABLE_C.ID = X.ID)

COMMIT TRANSACTION;