Question

我有一个包含许多列的大表，特别是我需要使用的三个列：CaseGroup，CaseStatus和CaseDesc。我试图基于打开的CaseStatus，多个CaseGroups来提取数据，然后在一个casegroup上只提供乱丢的CaseDesc。这是我已经拥有的简单部分：

Select  CaseID, CaseStatus, CaseGroup, CaseDesc
FROM  CodeEnforcement
WHERE  CaseStatus = 'Open' AND CaseGroup IN ('ProStd', 'San', 'Tow', 'Weeds')

我想要所有CaseDesc for ProStd，Tow和Weeds。但是，对于San我只想要LIKE '%littering%'。我该如何完成呢？我必须加入两个选择语句吗？

Answer 1

您可以使用以下查询：

Select  CaseID, CaseStatus, CaseGroup, CaseDesc
FROM  CodeEnforcement
WHERE  CaseStatus = 'Open' AND 
       (CaseGroup IN ('ProStd', 'Tow', 'Weeds') OR
        (CaseGroup = 'San' AND CaseDesc LIKE '%littering%'))

Answer 2

您应该在条件中添加or。这样的事情。

Select  CaseID, CaseStatus, CaseGroup, CaseDesc
FROM  CodeEnforcement
WHERE  CaseStatus = 'Open' AND (CaseGroup IN ('ProStd', 'Tow', 'Weeds')
or (CaseGroup = 'San'and CaseDesc like '%littering%')) --make sure you use parentheses

在WHERE子句中对一个语句进行额外过滤

2 个答案: