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我希望返回列A为空或列B为空,但两者都为空的那些行的SQL语句中,我的WHERE子句应该是什么?SQL WHERE语句?
我希望返回列A为空或列B为空,但两者都为空的那些行的SQL语句中,我的WHERE子句应该是什么?SQL WHERE语句?
WHERE (ColA is NULL AND ColB is NOT NULL)
OR (ColB is NULL AND ColA is NOT NULL)
(A IS NULL OR B IS NULL) AND NOT (A IS NULL AND B IS NULL)