SQL语句中case语句语法学习

① 简单Case语句，语法如下：

CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN result ...] [ELSE result] END

SELECT (CASE value WHEN 1 THEN 'one'  WHEN 2 THEN 'two' ELSE 'more' END) value from myValue ;

CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...] [ELSE result] END

select  (CASE WHEN sex = '1' THEN '男'  WHEN sex = '2' THEN '女' ELSE '其他' END)  gender

from myValue;