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How to implement Count (*) as variable from MySQL to display the number of records in a table?
The alias name can be used as a variable name in MySQL as shown in the below syntax −
select count(*) AS anyAliasName from yourTableName;
Let us first create a table −
mysql> create table DemoTable695 ( FirstName varchar(100) ); Query OK, 0 rows affected (0.72 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable695 values('Chris');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable695 values('Robert');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable695 values('David');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable695 values('Mike');
Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −
mysql> select *from DemoTable695;
This will produce the following output -
+-----------+ | FirstName | +-----------+ | Chris | | Robert | | David | | Mike | +-----------+ 4 rows in set (0.00 sec)
Following is the query to consider count(*) as variable in MySQL −
mysql> select count(*) AS TOTAL_NO_OF_RECORDS from DemoTable695 ;
This will produce the following output -
+---------------------+ | TOTAL_NO_OF_RECORDS | +---------------------+ | 4 | +---------------------+ 1 row in set (0.02 sec)
Updated on: 21-Aug-2019
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