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MySQL order by field using CASE Statement
To order by field, use CASE statement. Let us first create a table −
mysql> create table DemoTable(StudentId varchar(100)); Query OK, 0 rows affected (1.69 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('STU-980');
Query OK, 1 row affected (0.28 sec)
mysql> insert into DemoTable values('STU-1029');
Query OK, 1 row affected (0.29 sec)
mysql> insert into DemoTable values('STU-189');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable values('STU-890');
Query OK, 1 row affected (0.38 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+ | StudentId | +-----------+ | STU-980 | | STU-1029 | | STU-189 | | STU-890 | +-----------+ 4 rows in set (0.00 sec)
Following is the query to MySQL order by field −
mysql> select *from DemoTable order by case WHEN StudentId = 'STU-890' THEN 1 WHEN StudentId = 'STU-1029' THEN 2 WHEN StudentId = 'STU-980' THEN 3 WHEN StudentId = 'STU-189' THEN 4 end;
This will produce the following output −
+-----------+ | StudentId | +-----------+ | STU-890 | | STU-1029 | | STU-980 | | STU-189 | +-----------+ 4 rows in set (0.08 sec)
Updated on: 22-Aug-2019
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