SELECT CURDATE() AS '日期', (CASE tableA.gender WHEN '0' THEN '男' WHEN '1' THEN '女' ELSE DATE_SUB(CURDATE(),INTERVAL 1 DAY) END ) AS '性别, FROM tableA
SELECT CURDATE() AS '日期', (CASE tableA.gender WHEN '0' THEN '男' WHEN '1' THEN '女' ELSE DATE_SUB(CURDATE(),INTERVAL 1 DAY) END ) AS '性别, FROM tableA