Hello all, I'm new to sql and have a question if someone would be kind enough to help me with, if I have a table that stores telemarketers by ID_number and the customer that they spoke to by CU_number and I use a select statement such as;
SELECT ID_number, count( CU_number ) FROM MyTable GROUP BY ID_number; To find the number of calls that each telemarketer made, this works fine but how do I then use the results that are returned to find those telemarketers that made the most telephone calls ? I tried SELECT ID_number, max( count( CU_number ) ) but this causes an error "#1111 - Invalid use of group function " I also tried SELECT ID_number, count( CU_number ) AS CC FROM MyTable GROUP BY ID_number WHERE CC = max( CC ); But this also causes an error, anyone able to offer some pointers ? Thanks Dave.
