hello,
I try to execute this sql in mysql shell,but got error as:
mysql> select * from (select uin,count(*) as dd from active_users where
date >= date_add(curdate(),interval -30 day) group by uin) where dd >=3;
ERROR 1248 (42000): Every derived table must have its own alias
But I can execute the sql statement of "select uin,count(*) as dd from
active_users where date >= date_add(curdate(),interval -30 day) group by
uin" successfully.
How to fixup it? thanks!
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