FROM `u_account_balance` a left join c_coupon b on a.source_id=b.id
left join c_activity c on b.activity_id=c.id WHERE a.staus = 0 and a.source_type = 0 $where_str) UNION
( SELECT a.id, a.user_id,0 as source_id , a.money, a.user_name, a.create_time, 2 AS is_essay, a.status,0 as title FROM `u_account_check` a WHERE `a.status` IN ( 0, 1, 2 ) $where_str)
( SELECT a.id, a.user_id,0 as source_id , a.money, a.user_name, a.create_time, 2 AS is_essay, a.status,0 as title FROM `u_account_check` a
WHERE a.status IN ( 0, 1, 2 ) $where_str)
) AS aaa ORDER BY `create_time` DESC LIMIT {$pageNo}, {$pageSize}";