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SUM
Aggregate function. Calculate the sum of a set of numbers. NULL values are ignored. If no values can be summed, this function returns NULL.
Syntax
SUM ( [DISTINCT] expression )
Arguments
- DISTINCT: optional keyword. If present, will sum the unique values.
- expression: any expression. This may be a column name, the result of another function, or a math operation.
Return Type
A double if the input type is double, otherwise decimal.
Examples
CREATE TABLE sumptuous (id int primary key, number1 int, number2 int);
INSERT INTO sumptuous VALUES (1, 1024, 4096), (2, 23452, NULL);
SELECT SUM(number1), SUM(number2) FROM sumptuous;
+--------------+--------------+
| SUM(number1) | SUM(number2) |
+--------------+--------------+
| 24476 | 4096 |
+--------------+--------------+
