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SUM_IF

SUM_IF​

The suffix -If can be appended to the name of any aggregate function. In this case, the aggregate function accepts an extra argument – a condition.

SUM_IF(<column>, <cond>)

Example​

Create a Table and Insert Sample Data

CREATE TABLE order_data (
  id INT,
  customer_id INT,
  amount FLOAT,
  status VARCHAR
);

INSERT INTO order_data (id, customer_id, amount, status)
VALUES (1, 1, 100, 'Completed'),
       (2, 2, 50, 'Completed'),
       (3, 3, 80, 'Cancelled'),
       (4, 4, 120, 'Completed'),
       (5, 5, 75, 'Cancelled');

Query Demo: Calculate the Total Amount of Completed Orders

SELECT SUM_IF(amount, status = 'Completed') AS total_amount_completed
FROM order_data;

Result

| total_amount_completed |
|------------------------|
|         270.0          |