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--------------------
