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Maintain the custom order of the IDs passed in MySQL
To maintain the custom order of IDs, use ORDER BY CASE statement. Let us first create a table −
mysql> create table DemoTable1550 -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.61 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1550 values(101,'Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1550 values(110,'Bob'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable1550 values(105,'Carol'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1550 values(109,'Mike'); Query OK, 1 row affected (0.17 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1550;
This will produce the following output −
+------+-------+ | Id | Name | +------+-------+ | 101 | Chris | | 110 | Bob | | 105 | Carol | | 109 | Mike | +------+-------+ 4 rows in set (0.00 sec)
Here is the query to maintain the order of the IDs passed −
mysql> select * from DemoTable1550 -> where Id IN(109,101,110) -> order by case Id -> when 109 then 1001 -> when 101 then 1002 -> when 110 then 1003 -> end;
This will produce the following output −
+------+-------+ | Id | Name | +------+-------+ | 109 | Mike | | 101 | Chris | | 110 | Bob | +------+-------+ 3 rows in set (0.00 sec)
Updated on: 12-Dec-2019
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