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MySQL select * with distinct id?
You can use GROUP BY command for select with distinct id. The syntax is as follows −
SELECT *FROM yourTableName GROUP BY yourColumnName;
To understand the above syntax, let us create a table. The query to create a table is as follows −
mysql> create table DistinctIdDemo -> ( -> Id int, -> Name varchar(20), -> Age int -> ); Query OK, 0 rows affected (1.03 sec)
Insert some records in the table using insert command. Here, we have added ID with duplicate values.
The query is as follows −
mysql> insert into DistinctIdDemo values(1,'Mike',23); Query OK, 1 row affected (0.16 sec) mysql> insert into DistinctIdDemo values(2,'Sam',24); Query OK, 1 row affected (0.20 sec) mysql> insert into DistinctIdDemo values(1,'Carol',23); Query OK, 1 row affected (0.15 sec) mysql> insert into DistinctIdDemo values(1,'John',28); Query OK, 1 row affected (0.33 sec) mysql> insert into DistinctIdDemo values(3,'David',26); Query OK, 1 row affected (0.22 sec) mysql> insert into DistinctIdDemo values(2,'Larry',29); Query OK, 1 row affected (0.20 sec)
Let us now display records −
mysql> select *from DistinctIdDemo;
The following is the output −
+------+-------+------+ | Id | Name | Age | +------+-------+------+ | 1 | Mike | 23 | | 2 | Sam | 24 | | 1 | Carol | 23 | | 1 | John | 28 | | 3 | David | 26 | | 2 | Larry | 29 | +------+-------+------+ 6 rows in set (0.00 sec)
Here is the query to get all records from the table with distinct id −
mysql> select *from DistinctIdDemo group by Id;
The following is the output −
+------+-------+------+ | Id | Name | Age | +------+-------+------+ | 1 | Mike | 23 | | 2 | Sam | 24 | | 3 | David | 26 | +------+-------+------+ 3 rows in set (0.00 sec)
Updated on: 30-Jun-2020
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