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PostgreSQL - search for NULL values in multiple columns

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Created by:
Tehya-Blanchard
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In this article, we would like to show you how to find rows with NULL values in many columns in PostgreSQL.

Quick solution:

Practical example

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To show how to find rows with NULL values in many columns, we will use the following table:

PostgreSQL - select rows with NULL values in multiple columns - example data
PostgreSQL - select rows with NULL values in multiple columns - example data

Note:

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

Example 1

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In this example, we will select all rows with NULL value both in email and department_id column using IS NULL and AND keywords.

Query:

Result:

PostgreSQL - select rows with multiple NULL column values - result
PostgreSQL - select rows with multiple NULL column values - result

Example 2

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In this example, we will select all rows with NULL value both in email and department_id column using COALESCE() function.

Query:

Result:

PostgreSQL - select rows with multiple NULL column values - result
PostgreSQL - select rows with multiple NULL column values - result

Database preparation

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create_tables.sql file:

insert_data.sql file:

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