ClickHouse/docs/en/sql-reference/aggregate-functions/reference/sum.md

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sum

Calculates the sum. Only works for numbers.

Syntax

sum(num)

Parameters

• num: Column of numeric values. (U)Int*, Float*, Decimal*.

Returned value

• The sum of the values. (U)Int*, Float*, Decimal*.

Example

First we create a table employees and insert some fictional employee data into it.

Query:

CREATE TABLE employees
(
    `id` UInt32,
    `name` String,
    `salary` UInt32
)
ENGINE = Log

INSERT INTO employees VALUES
    (87432, 'John Smith', 45680),
    (59018, 'Jane Smith', 72350),
    (20376, 'Ivan Ivanovich', 58900),
    (71245, 'Anastasia Ivanovna', 89210);

We query for the total amount of the employee salaries using the sum function.

Query:

SELECT sum(salary) FROM employees;

Result:

   ┌─sum(salary)─┐
1. │      266140 │
   └─────────────┘