EN
PostgreSQL - calculate average of column values and display the result with no decimals
0 points
In this article, we would like to show you how to calculate the average of column values and display the result with no decimals PostgreSQL.
Quick solution:
xxxxxxxxxx1
SELECT ROUND(AVG("column_name"), 0)2
FROM "table_name";To show how to calculate the average of column values and display the result with no decimals, we will use the following table:
Note:
At the end of this article you can find database preparation SQL queries.
In this example, we will display the average salary rounded to 0 decimal places with ROUND() function.
Query:
xxxxxxxxxx1
SELECT ROUND(AVG("salary"), 0)2
FROM "users";Output:
Note:
Go to this article to read more about
ROUND()function - PostgreSQL - ROUND() function example.
create_tables.sql file:
xxxxxxxxxx1
CREATE TABLE "users" (2
"id" SERIAL,3
"name" VARCHAR(50) NOT NULL,4
"surname" VARCHAR(50) NOT NULL,5
"department_id" INTEGER,6
"salary" DECIMAL(15,2) NOT NULL,7
PRIMARY KEY ("id")8
);insert_data.sql file:
xxxxxxxxxx1
INSERT INTO "users"2
( "name", "surname", "department_id", "salary")3
VALUES4
('John', 'Stewart', 1, '3512.00'),5
('Chris', 'Brown', 2, '1344.00'),6
('Kate', 'Lewis', 3, '6574.00'),7
('Ailisa', 'Gomez', NULL, '6500.00'),8
('Gwendolyn', 'James', 2, '4200.00'),9
('Simon', 'Collins', 4, '3320.00'),10
('Taylor', 'Martin', 2, '1500.00'),11
('Andrew', 'Thompson', NULL, '2100.00');