tsql - T SQL 根据计算字段删除记录

Question

我想删除表中 6 个字段的答案为零/空的行：

Delete
from TableA
WHERE (a + b + c + d + e + f) IS NULL

谢谢

Answer 1

 WHERE COALESCE((a + b + c + d + e + f), 0) = 0

或者

 WHERE NULLIF((a + b + c + d + e + f), 0) IS NULL

不需要对每一列都有这个

Answer 2

尝试这个

DELETE T FROM
  dbo.TableA T
  WHERE COALESCE(a, 0) + 
        COALESCE(b, 0) + 
        COALESCE(c, 0) +
        COALESCE(d, 0) +
        COALESCE(e, 0) +
        COALESCE(f, 0) = 0

看到这个 SQLFiddle

Answer 3

如果您只想删除这些行，那么您可以使用查询

DELETE FROM TableName
WHERE (a + b + c + d + e + f) IS NULL OR (a + b + c + d + e + f) = 0

我希望它会帮助你。:)

Answer 4

您的意思是如果所有字段为空，或者如果 1 个或多个字段为空？

它可能很简单：

delete
from TableA
WHERE (a + b + c + d + e + f) IS NULL