MySQL Order By
MySQL order by data sorting is important where we want to display the data in any particular order. MySQL provides ORDER BY clause to display data in an ordered way. The result set can be sorted in either ascending or descending order, by default it sort the data in ascending order and we can also sort by either single or multiple columns.
Syntax of ORDER BY
SELECT * FROM table_name ORDER BY 'field_name(s)'MySQL Order By Exercise
1. Write a MySQL statement to select data of all departments in descending order by age.
Suppose the table is -
+----+--------------+------------+-----+
| id | name | department | age |
+----+--------------+------------+-----+
| 1 | Maria Gloria | CS | 22 |
| 2 | John Smith | IT | 23 |
| 3 | Gal Rao | CS | 22 |
| 4 | Jakey Smith | EC | 24 |
| 5 | Rama Saho | IT | 22 |
| 6 | Maria Gaga | EC | 23 |
+----+--------------+------------+-----+
Solution
The default sort order is ascending, with smallest values first. To sort the data in descending order, add the DESC keyword to the name of the column you are sorting by -
The following statement returns student data of all departments in descending order by age.
mysql> SELECT * FROM students
-> ORDER BY age DESC;
Output of the above statement -
+----+--------------+------------+-----+
| id | name | department | age |
+----+--------------+------------+-----+
| 4 | Jakey Smith | EC | 24 |
| 2 | John Smith | IT | 23 |
| 6 | Maria Gaga | EC | 23 |
| 1 | Maria Gloria | CS | 22 |
| 3 | Gal Rao | CS | 22 |
| 5 | Rama Saho | IT | 22 |
+----+--------------+------------+-----+
2. Write a MySQL statement to select data of all departments in ascending order by name and age.
Solution
The following statement returns student data of all departments in ascending order by name and age.
mysql> SELECT * FROM students
-> ORDER BY 'name', 'age';
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