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MS SQL Server - GROUP BY statement

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Created by:

Elleanor-Williamson

380

In this article, we would like to show you how to use GROUP BY statement in MS SQL Server.

Quick solution:

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SELECT [column1], [column2], [columnN]
FROM [table_name]
WHERE condition
GROUP BY [column_name]
ORDER BY [column_name];

Practical example

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To show how the GROUP BY statement works, we will use the following table:

Note:

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

Example

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In this example, we will display the number of users in each country descending.

Query:

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SELECT COUNT([name]) AS [number of users], [country]
FROM [users]
GROUP BY [country]
ORDER BY COUNT([name]) DESC;

Output:

MS SQL Server - GROUP BY statement result

Database preparation

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create_tables.sql file:

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CREATE TABLE [users] (
    [id] INT IDENTITY(1,1),
    [name] VARCHAR(100) NOT NULL,
    [country] VARCHAR(15) NOT NULL,
    PRIMARY KEY ([id])
);

insert_data.sql file:

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INSERT INTO [users]
    ([name], [country])
VALUES
    ('Tom', 'Poland'),
    ('Chris', 'Spain'),
    ('Jack', 'Spain'),
    ('Kim', 'Vietnam'),
    ('Marco', 'Italy'),
    ('Kate', 'Spain'),
    ('Nam', 'Vietnam');