当某些事情是真的时,有没有办法忽略CASE中的AND？

Question

我有这个Where条款

Select * From Student_Info si
Inner Join Certifications cc
Inner Join Cert_Earned ce

Where si.grad_date = @grad_date
AND cc.org_no = @org_no

但是我需要一个额外的AND,如果结果是值为false,我应该忽略所有证书

AND cc.industrial = CASE WHEN @industrial = 0 THEN Do Nothing
                     Else @industrial

Answer 1

这通常表示为:

AND (@industrial = 0 OR ccc.industrial = @industrial)