Try this [#4124113@0 -ROLIA.NET 相约加拿大网上社区之枫下论坛 & 枫下部落, 枫下论坛主坛 ]

字体：小中大特

Try this

by registereduser (立牌坊) at 2007.12.16 13:55 (#4124113@0)

SELECT *
FROM table_name
WHERE column_1 IS NULL OR
column_2 IS NULL OR
column_1 <> column_2;

该话题已在历史区内，不能被修改或回复。收藏投诉