EN
PostgreSQL - LOWER() function example
0 points
In this article, we would like to show you how to use LOWER() function in PostgreSQL.
Quick solutions:
xxxxxxxxxx1
SELECT LOWER('SOME TEXT...');xxxxxxxxxx1
SELECT LOWER("column_name") FROM "table_name";To show how the LOWER() function works, 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 all the names from users table in lowercase.
Query:
xxxxxxxxxx1
SELECT LOWER("name") AS "Lowercase names" FROM "users";Output:
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');