在“case”表达式中使用'in'语句

Question

如何在我的“case expression”中使用IN？

这是我的查询，我想算，如果任何比赛一样mumbai然后发现为mumbai：个别支数的

select TYPEOFPRODUCT, 
     SUM(CASE(BRANCH) WHEN IN('Mumbai1' OR 'Mumbai2') THEN 1 ELSE 0 END) AS 'Mumbai' 
     SUM(CASE(BRANCH) WHEN IN('Delhi1' OR 'DelhiMain') THEN 1 ELSE 0 END) AS 'Delhi' 
from los_ext 
group by TYPEOFPRODUCT 

Answer 1

你被关闭，你只需要以逗号分隔值IN而不是使用OR，并且CASE表达式有两种格式，将该字段与之后的条件相关联更加灵活，所以我更喜欢只使用它：

SELECT TYPEOFPRODUCT 
     ,SUM(CASE WHEN BRANCH IN('Mumbai1','Mumbai2') THEN 1 ELSE 0 END) AS Mumbai 
     ,SUM(CASE WHEN BRANCH IN('Delhi1', 'DelhiMain') THEN 1 ELSE 0 END) AS Delhi 
FROM los_ext 
GROUP BY TYPEOFPRODUCT 

Answer 2

它的查询语句select和

select TYPEOFPRODUCT, 
SUM(CASE WHEN (BRANCH = 'Mumbai1' OR BRANCH = 'Mumbai2') THEN 1 ELSE 0 END) AS 'Mumbai', 
SUM(CASE WHEN (BRANCH = 'Delhi1' OR BRANCH = 'DelhiMain') THEN 1 ELSE 0 END) AS 'Delhi' 
from los_ext 
group by TYPEOFPRODUCT