SQL中Case When的用法

SELECT *,
CASE WHEN sex = '1' THEN '男'
WHEN sex = '2' THEN '女'
ELSE '其他' END

 from test 

 

SELECT *,
CASE WHEN sex = '1' and phone ='110' THEN '30%'
WHEN sex = '2' and phone ='113' THEN '女'
WHEN sex = '3' and name ='张七' THEN '50%'
ELSE '其他' END

from test

 优先级问题--------------------