MySQL query to select distinct order by id


For this, use ORDER BY MAX(). Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Id int,
   -> Name varchar(100)
   -> );
Query OK, 0 rows affected (0.81 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(10,'John');
Query OK, 1 row affected (0.51 sec)

mysql> insert into DemoTable values(10,'John');
Query OK, 1 row affected (0.10 sec)

mysql> insert into DemoTable values(20,'Sam');
Query OK, 1 row affected (0.17 sec)

mysql> insert into DemoTable values(20,'Sam');
Query OK, 1 row affected (0.11 sec)

mysql> insert into DemoTable values(30,'David');
Query OK, 1 row affected (0.13 sec)

mysql> insert into DemoTable values(30,'David');
Query OK, 1 row affected (0.11 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+------+-------+
| Id   | Name  |
+------+-------+
|   10 | John  |
|   10 | John  |
|   20 | Sam   |
|   20 | Sam   |
|   30 | David |
|   30 | David |
+------+-------+
6 rows in set (0.00 sec)

Following is the query to select distinct order by id −

mysql> select Name from DemoTable
   -> group by Name
   -> order by max(Id) DESC
   -> limit 2;

This will produce the following output −

+-------+
| Name  |
+-------+
| David |
| Sam   |
+-------+
2 rows in set (0.06 sec)
raja
Published on 11-Jul-2019 16:56:42
Advertisements