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MS SQL Server - count rows with NULL values

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In this article, we would like to show you how to count rows with NULL values in MS SQL Server.

Quick solution:

SELECT COUNT(*) AS 'alias_name'
FROM [table_name]
WHERE [column_name] IS NULL;

Practical example

To show you how to count rows with NULL values, we will use the following users table:

MS SQL Server - example data used to count rows with NULL values
MS SQL Server - example data used to count rows with NULL values

Note:

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

Example

In this example, we will count the number of rows with NULL values in department_id column.

Query

SELECT COUNT(*) AS 'NULL_values_in_column'
FROM [users]
WHERE [department_id] IS NULL;

Result:

MS SQL Server - count rows with NULL values - result
MS SQL Server - count rows with NULL values - result

Database preparation

create_tables.sql file:

CREATE TABLE [users] (
	[id] INT IDENTITY(1,1),
	[name] VARCHAR(50) NOT NULL,
	[surname] VARCHAR(50) NOT NULL,
	[department_id] INT,
    [salary] DECIMAL(15,2) NOT NULL,
	PRIMARY KEY ([id])
);

insert_data.sql file:

INSERT INTO [users]
	( [name], [surname], [department_id], [salary])
VALUES
	('John', 'Stewart', 1, '6000'),
	('Chris', 'Brown', 2, '6000'),
	('Kate', 'Lewis', 3, '4000'),
	('Ailisa', 'Gomez', NULL, '4000'),
	('Gwendolyn', 'James', NULL, '4000'),
	('Simon', 'Collins', 4, '4000'),
	('Taylor', 'Martin', 2, '2000'),
	('Andrew', 'Thompson', NULL, '2000');

MS SQL Server - problems

MS SQL Server - count rows with NULL values
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