GROUP BY SQL query to get number of records, average , maximum minimum & sum over a group of records
plus2net.com
GROUP BY SQL query to get number of records, average , maximum minimum & sum over a group of records
https://www.plus2net.com/sql_tutorial/sql_group_by.phpBy using group by query we can use aggregate functions like count(), max(), min() , avg() , sum() to get data over a group of records. command will create groups in the field name specified and will count the numberof records in the groups.SELECT count(*) as total_records, class FROM ...
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