php - How do I delete duplicate rows in SQL? -


this question has answer here:

i trying delete duplicate rows using sql, whilst leaving 1 of rows behind.

the table trying delete duplicate rows called table "a" made of:

a.aid, a.bid, a.aname, a.atype, a.aprice.

in table have number of duplicate rows of data same apart a.id.

i trying create query duplicates , remove duplicate making sure 1 of rows left behind. using phpmyadmin , mysql.

delete member   id in (select *               (select id member                     group member_id, quiz_num, question_num, answer_num having (count(*) > 1)                   )             );

use group , count


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