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PostgreSQL - find rows where column is empty string (blank)

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Created by:
Dirask Admin - Marvin
1820

In this article, we would like to show you how to find rows where the column value is an empty string in PostgreSQL.

Quick solution:

SELECT * FROM "table_name" WHERE "column_name" = '';

If your column is NULL then the below query works:

SELECT * FROM "table_name" WHERE "column_name" IS NULL;

Practical example

To show how to find rows where the column value is an empty string, we will use the following table:

PostgreSQL - find rows with blank column - example data
PostgreSQL - find rows with blank column - example data

Note:

At the end of this article you can find database preparation SQL queries.

Example

In this example, we will find rows from users table with empty email column.

Query:

SELECT *
FROM "users"
WHERE "email" = '';

Result:

PostgreSQL - find rows with blank column - result
PostgreSQL - find rows with blank column - result

Database preparation

create_tables.sql file:

CREATE TABLE "users" (
	"id" SERIAL,
	"name" VARCHAR(50) NOT NULL,
	"surname" VARCHAR(50) NOT NULL,
	"email" VARCHAR(50),
	PRIMARY KEY ("id")
);

insert_data.sql file:

INSERT INTO "users"
	( "name", "surname", "email")
VALUES
	('John', 'Stewart', 'john@email.com'),
	('Chris', 'Brown', ''),
	('Kate', 'Lewis',''),
	('Ailisa', 'Gomez', 'ailisa@email.com'),
	('Gwendolyn', 'James', ''),
	('Simon', 'Collins', ''),
	('Taylor', 'Martin',''),
	('Andrew', 'Thompson', 'andrew123@email.com');

PostgreSQL - problems

PostgreSQL - find rows where column is empty string (blank)
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