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How to perform custom sort by field value in MySQL?
To perform custom sort by field value in MySQL, use the FIELD() method in ORDER BY. Let us first create a table:
mysql> create table DemoTable (StudentId int); Query OK, 0 rows affected (0.58 sec)
Following is the query to insert some records in the table using insert command:
mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(110); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(90); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(70); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(120); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(140); Query OK, 1 row affected (0.14 sec)
Following is the query to display records from the table using select command:
mysql> select *from DemoTable;
This will produce the following output:
+-----------+ | StudentId | +-----------+ | 100 | | 110 | | 90 | | 70 | | 120 | | 140 | +-----------+ 6 rows in set (0.00 sec)
Following is the query to perform custom MySQL sort by field value:
mysql> select *from DemoTable order by field(StudentId,'100','70','140','90','120','110');
This will produce the following output:
+-----------+ | StudentId | +-----------+ | 100 | | 70 | | 140 | | 90 | | 120 | | 110 | +-----------+ 6 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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