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MySQL multiple COUNT with multiple columns?
You can use an aggregate function SUM() along with IF(). Let us first create a table −
mysql> create table DemoTable ( FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (2.80 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('Adam','Smith');
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable values('John','Smith');
Query OK, 1 row affected (0.36 sec)
mysql> insert into DemoTable values('John','Doe');
Query OK, 1 row affected (1.38 sec)
mysql> insert into DemoTable values('Bob','Doe');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('Sam','Smith');
Query OK, 1 row affected (0.25 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | Adam | Smith | | John | Smith | | John | Doe | | Bob | Doe | | Sam | Smith | +-----------+----------+ 5 rows in set (0.00 sec)
Here is the query to MySQL multiple COUNT with multiple columns.
mysql> select sum(if(FirstName='John',1,0)) as John_Count, sum(if(LastName='Smith',1,0)) as Smith_Count from DemoTable;
This will produce the following output −
+------------+-------------+ | John_Count | Smith_Count | +------------+-------------+ | 2 | 3 | +------------+-------------+ 1 row in set (0.00 sec)
Updated on: 30-Sep-2019
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