在'case'表达式中使用'in'语句

Question

如何在我的“案例表达”中使用int？

这是我的查询，如果找到IN之类的任何匹配作为mumbai，我想要计数：

mumbai

Answer 1

你很接近，你只需要用IN逗号分隔值而不是OR，CASE表达式有两种格式，在{WHEN后面加上标准的字段{1}}更灵活，所以我更喜欢单独使用它：

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

其查询选择各个分支的总和

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