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Check how many rows are in a MySQL database table?
To know how many rows are in a ySQL database table, you need to use aggregate function COUNT(*).
The syntax is as follows
SELECT COUNT(*) FROM yourTableName;
To understand the above syntax, let us create a table. The query to create a table is as follows
mysql> create table CountRowsDemo - > ( - > Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, - > Name varchar(20) - > ); Query OK, 0 rows affected (0.78 sec)
Insert some records in the table using insert command.
The query is as follows
mysql> insert into CountRowsDemo(Name) values(NULL);
Query OK, 1 row affected (0.15 sec)
mysql> insert into CountRowsDemo(Name) values('Sam');
Query OK, 1 row affected (0.25 sec)
mysql> insert into CountRowsDemo(Name) values(NULL);
Query OK, 1 row affected (0.11 sec)
mysql> insert into CountRowsDemo(Name) values('Mike');
Query OK, 1 row affected (0.21 sec)
mysql> insert into CountRowsDemo(Name) values('David');
Query OK, 1 row affected (0.11 sec)
mysql> insert into CountRowsDemo(Name) values(NULL);
Query OK, 1 row affected (0.11 sec)
mysql> insert into CountRowsDemo(Name) values(NULL);
Query OK, 1 row affected (0.09 sec)
mysql> insert into CountRowsDemo(Name) values('Carol');
Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement.
The query is as follows
mysql> select *from CountRowsDemo;
The following is the output
+----+-------+ | Id | Name | +----+-------+ | 1 | NULL | | 2 | Sam | | 3 | NULL | | 4 | Mike | | 5 | David | | 6 | NULL | | 7 | NULL | | 8 | Carol | +----+-------+ 8 rows in set (0.00 sec)
Now let us run the following query to count rows from a table
mysql> select count(*) AS TotalRows from CountRowsDemo;
The following is the output
+-----------+ | TotalRows | +-----------+ | 8 | +-----------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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