select COUNT(distinct a.oid) count from member a wherea.tid = '2001' AND a.type = 0AND a.delete_at is null执行是2.7s 库里有25w数据select COUNT(a.id) count from member a wherea.tid = '2001' AND a.type = 0AND a.delete_at is null执行..
错误如下:in:[select customers_info_date_account_created from customers_info where customers_info_id =12345 LIMIT 1 ]If you were entering information, press the BACK button in your browser and re-check the information you had ente..
问题一:user_comment是进行分表的,分表的算法是根据user表的id取余来的,现在user连表user_comment进行查询,怎么动态的根据user表的id而取到动态的user_comment表例子:select * from user left join user_comment on user.id=user_comment.user..