49261 mySQL query help

I need a mySQL expert to help me write three queries: Query 1 file_id | name | comon_id need to distinct by common_id and be able to do WHERE ____ ORDER ___ common_id | votes | total common_id is unique referances top table common_id query 2: needs to do math and get value of total/votes and then return common_id into query ordering table1 by common_id query 3 : counts how groups and coutns common_id in table1 and orders by highest number

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