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How to get the count of each distinct value in a column in MySQL?
Let us see an example to get the count of each distinct value in a column. Firstly, we will create a table.
The CREATE command is used to create a table.
mysql> create table DistinctDemo1 - > ( - > id int, - > name varchar(100) - > ); Query OK, 0 rows affected (0.43 sec)
Inserting records
mysql> insert into DistinctDemo1 values(1,'John'); Query OK, 1 row affected (0.34 sec) mysql> insert into DistinctDemo1 values(2,'John'); Query OK, 1 row affected (0.20 sec) mysql> insert into DistinctDemo1 values(3,'John'); Query OK, 1 row affected (0.09 sec) mysql> insert into DistinctDemo1 values(4,'Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into DistinctDemo1 values(5,'David'); Query OK, 1 row affected (0.12 sec)
Displaying all records
mysql> select *from DistinctDemo1;
The following is the output that displays all the records.
+------+-------+ | id | name | +------+-------+ | 1 | John | | 2 | John | | 3 | John | | 4 | Carol | | 5 | David | +------+-------+ 5 rows in set (0.00 sec)
The following is the syntax to get the count.
mysql> SELECT name,COUNT(1) as OccurenceValue FROM DistinctDemo1 GROUP BY name ORDER BY OccurenceValue;
Here is the output.
+-------+----------------+ | name | OccurenceValue | +-------+----------------+ | Carol | 1 | | David | 1 | | John | 3 | +-------+----------------+ 3 rows in set (0.04 sec)
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