mysql操做查询结果case when then else end用法举例

Case具备两种格式。简单Case函数和Case搜索函数。  –简单Case函数  CASE sex           WHEN ‘1’ THEN ‘男’           WHEN ‘2’ THEN ‘女’  ELSE ‘其余’ END  –Case搜索函数  CASE WHEN sex = ‘1’ THEN ‘男’           WHEN sex = ‘2’ THEN ‘女’  EL

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