Mysql order by clause
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This document discusses aggregate functions like count, max, min, avg and sum. It also covers the order by clause for sorting results in ascending or descending order, the having clause for filtering group results, and the distinct clause for removing duplicate rows. Examples are given showing how to use the group by clause with aggregate functions, order results, and select distinct values.
Mysql order by clause
- 1. Aggregate Functions Order by clause Having Clause Distinct Clause
- 13. The default sort order is ascending, with smallest values first. To sort in reverse (descending) order, add the DESC keyword to the name of the column you are sorting by:
- 17. SELECT ordernumber , itemsCount , sum(priceeach) AS total FROM orderdetails GROUP BY ordernumber
- 20. order to remove the duplicate rows, we use the DISTINCT operator in the SELECT statement. General Syntax SELECT DISTINCT columns FROM table_name WHERE where_conditions
- 21. SELECT lastname FROM employees ORDER BY lastname
- 22. SELECT DISTINCT lastname FROM employees ORDER BY lastname