SQL SUM( ) Function

The SUM() Function

The SUM() function returns the total sum of a numeric column.

SQL SUM() Syntax

SELECT SUM(column_name) FROM table_name

SQL SUM() Example

We have the following "result" table:

Student_No	Subject_No	Year_Exam	Marks
ST101	SU03	1	69
ST102	SU01	1	61
ST101	SU04	1	70
ST101	SU05	1	87
ST103	SU01	2	51
ST103	SU03	1	59
ST103	SU01	3	56
ST108	SU01	1	78
ST105	SU05	2	98

Now we want to find the sum of all "Marks" .

We use the following SQL statement:

SELECT SUM(Marks) AS Total_Marks FROM result;

The result-set will look like this:

Total_Marks

629