我想从两列表中删除不匹配的记录吗？

Question

我想通过比较表的两列来删除不匹配的记录？

Answer 1

请尝试这个。

DELETE FROM @tbl WHERE Column1 != Column2

    OR

DELETE A FROM @tbl1 A
LEFT JOIN @tbl2 B
ON A.Id = B.Id 
WHERE B.Id IS NULL

Answer 2

如果要比较两个表：

DELETE FROM Table1
WHERE (COLUMN)
NOT IN
(SELECT Table2.COLUMN  FROM Table2,TABLE1 where Table2.COLUMN=TABLE1.COLUMN)

其他：

    DELETE FROM Table1 where column1!=column2

Answer 3

您还可以使用“左联接”删除不匹配的记录。

DELETE t1 FROM @TABLE1 t1 
LEFT JOIN @TABLE2 t2 on t1.NAME1 = t2.NAME2
WHERE t2.ID IS NULL

DEMO