How to sum elements of a column in MySQL?

Use aggregate function sum() to sum the elements of a column in MySQL. The syntax is as follows −

select sum(yourColumnName1) as anyVariableName1,sum(yourColumnName2) as anyVariableName2,sum(yourColumnName3) as anyVariableName3,............N from yourTableName;

To understand the above syntax, let us create a table. The following is the query to create a table −

mysql> create table SumDemoOnColumns
   −> (
   −> First int,  
   −> Second int,
   −> Third int
   −> );
Query OK, 0 rows affected (0.56 sec)

Insert some data in the table using insert command. The query is as follows −

mysql> insert into SumDemoOnColumns values(10,20,30);
Query OK, 1 row affected (0.18 sec)

mysql> insert into SumDemoOnColumns values(40,50,60);
Query OK, 1 row affected (0.32 sec)

mysql> insert into SumDemoOnColumns values(70,80,90);
Query OK, 1 row affected (0.10 sec)

mysql> insert into SumDemoOnColumns values(100,110,120);
Query OK, 1 row affected (0.16 sec)

Display all records from the table using select statement. The query is as follows −

mysql> select *from SumDemoOnColumns;

The following is the output −

+-------+--------+-------+
| First | Second | Third |
+-------+--------+-------+
|    10 |     20 |    30 |
|    40 |     50 |    60 |
|    70 |     80 |    90 |
|   100 |    110 |   120 |
+-------+--------+-------+
4 rows in set (0.00 sec)

The following is the query to get sum of columns −

mysql> select sum(First) as First,sum(Second) as Second,sum(Third) as Third from SumDemoOnColumns;

The following is the output −

+-------+--------+-------+
| First | Second | Third |
+-------+--------+-------+
|   220 |    260 |   300 |
+-------+--------+-------+
1 row in set (0.00 sec)