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MySQL query to count rows with a specific column?
Let us first create a table −
mysql> create table DemoTable841( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Value varchar(100) ); Query OK, 0 rows affected (0.67 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable841(Value) values('X');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable841(Value) values('Y');
Query OK, 1 row affected (0.39 sec)
mysql> insert into DemoTable841(Value) values('Y');
Query OK, 1 row affected (1.62 sec)
mysql> insert into DemoTable841(Value) values('Z');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable841(Value) values('X');
Query OK, 1 row affected (0.81 sec)
mysql> insert into DemoTable841(Value) values('Z');
Query OK, 1 row affected (0.26 sec)Display all records from the table using select statement −
mysql> select *from DemoTable841;
This will produce the following output −
+----+-------+ | Id | Value | +----+-------+ | 1 | X | | 2 | Y | | 3 | Y | | 4 | Z | | 5 | X | | 6 | Z | +----+-------+ 6 rows in set (0.00 sec)
Following is the query to count rows with a specific column in MySQL −
mysql> select Value,Concat(COUNT(Value),' Times') from DemoTable841 group by Value;
This will produce the following output −
+-------+-------------------------------+ | Value | Concat(COUNT(Value),' Times') | +-------+-------------------------------+ | X | 2 Times | | Y | 2 Times | | Z | 2 Times | +-------+-------------------------------+ 3 rows in set (0.04 sec)
Updated on: 03-Sep-2019
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