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MySQL query to ORDER BY `user_id` IN (1,2,3) AND `name` for custom ordering
To implement IN() for custom ordering, use ORDER BY CASE.
Let us first create a table −
mysql> create table DemoTable752 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(100) ); Query OK, 0 rows affected (0.63 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable752(Name) values('John');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable752(Name) values('Carol');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable752(Name) values('Bob');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable752(Name) values('Mike');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable752(Name) values('Sam');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable752(Name) values('Adam');
Query OK, 1 row affected (0.26 sec)
mysql> insert into DemoTable752(Name) values('Chris');
Query OK, 1 row affected (0.26 sec)Display all records from the table using select statement −
mysql> select *from DemoTable752;
This will produce the following output -
+----+-------+ | Id | Name | +----+-------+ | 1 | John | | 2 | Carol | | 3 | Bob | | 4 | Mike | | 5 | Sam | | 6 | Adam | | 7 | Chris | +----+-------+ 7 rows in set (0.00 sec)
Following is the query to order by with custom values −
mysql> select *from DemoTable752
order by
case
when Id IN (1,2,3) then 1
else Id
END,
Name;This will produce the following output -
+----+-------+ | Id | Name | +----+-------+ | 3 | Bob | | 2 | Carol | | 1 | John | | 4 | Mike | | 5 | Sam | | 6 | Adam | | 7 | Chris | +----+-------+ 7 rows in set (0.00 sec)
Updated on: 03-Sep-2019
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