小编Axm*_*med的帖子

我想在OUTER APPLY中写IF条件.我需要返回多个列,所以我不想写子查询

SELECT name FROM v_users 
OUTER APPLY
(
    IF CAST(reg_date AS DATE)<CAST('03/25/2017' AS DATE)
   SELECT gender,email,age,class FROM tb_register_old WHERE id=v_users.user_id;
ELSE 
   SELECT gender,email,age,class FROM tb_register_new WHERE id=v_users.user_id;
)s