sql语句判断身份证性别等

SELECT  t.card_number '身份证号',SUBSTR(t.card_number,,) AS "省份",

SUBSTR(t.card_number,,)    "出生年月",

SUBSTR(t.card_number,,)  "性别" ,

CASE (SUBSTR(t.card_number,,)%)

WHEN  THEN '男'

WHEN   THEN '女'

END AS  '性别'

FROM user t ;