SUM
Aggregate function.
The SUM() function calculates the sum of a set of values.
Caution: NULL values are not counted.
Analyze Syntax
func.sum(<column>)
Analyze Examples
func.sum(table.quantity).alias('total_quantity_sold')
| total_quantity_sold |
|---------------------|
|         41          |
SQL Syntax
SUM(<expr>)
Arguments
| Arguments | Description | 
|---|---|
| <expr> | Any numerical expression | 
Return Type
A double if the input type is double, otherwise integer.
SQL Examples
Create a Table and Insert Sample Data
CREATE TABLE sales_data (
  id INT,
  product_id INT,
  quantity INT
);
INSERT INTO sales_data (id, product_id, quantity)
VALUES (1, 1, 10),
       (2, 2, 5),
       (3, 3, 8),
       (4, 4, 3),
       (5, 5, 15);
Query Demo: Calculate the Total Quantity of Products Sold
SELECT SUM(quantity) AS total_quantity_sold
FROM sales_data;
Result
| total_quantity_sold |
|---------------------|
|         41          |