在一個語句中的額外過濾在WHERE子句

Question

我有很多列的大表，特別是我需要使用的三個表：CaseGroup，CaseStatus和CaseDesc。我試圖根據打開的CaseStatus，多個CaseGroups，然後在一個病例組上只有亂七八糟的CaseDesc來提取數據。這裏是我已經有的簡單部分：

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

我希望所有CaseDesc for ProStd，Tow和Weeds。但是，對於我只想要LIKE '%littering%'。我該如何去做到這一點？我必須加入兩條select語句嗎？

Answer 1

您可以使用下面的查詢：

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

您應該添加or你的條件。像這樣的東西。

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