MySQL query to count rows with a specific column?

MySQLMySQLi Database

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)
raja
Published on 03-Sep-2019 10:55:38
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