sql删除列

Question

表中有四列

如果a4列为空，我想删除

那我为什么要写代码

delete MAX(ID) as a1,a2,a3,a4 
FROM dbo.T07StokDurum where a4 is null
GROUP BY DesenKodu,Ebat
HAVING COUNT(*) > 1

Answer 1

您的删除语法不正确。参见SQL DELETE Statement。

DELETE FROM dbo.T07StokDurum WHERE a4 IS NULL

Answer 2

如果您要删除A4列为空的整行，只需：

DialogRef

..会的。不需要您编写的其余代码。除非您尝试执行其他未指定的操作。