How to Get the Grand Total and Subtotal in One Row in SQL Server

Learn how to write an SQL query to retrieve both `grand totals` and `subtotals` for different channels in a single row, enhancing your report configurations in SQL Server.
---
This video is based on the question https://stackoverflow.com/q/73685636/ asked by the user 'jymskrl' ( https://stackoverflow.com/u/11218734/ ) and on the answer https://stackoverflow.com/a/73685684/ provided by the user 'Thorsten Kettner' ( https://stackoverflow.com/u/2270762/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to get the grand total and the subtotal in one row?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Simplifying SQL Totals: Getting Grand Total and Subtotals in One Row

When working with SQL databases, particularly in SQL Server, you may find yourself needing to get a grand total alongside subtotals for different categories in a single output row. This approach not only simplifies data presentation but also improves clarity in your reports. In this guide, we will explore a common issue related to this problem and present a well-structured solution to achieve the desired results.

The Problem Statement

Imagine you have a table named CHANNEL_AMOUNT that records the amount associated with different channels. Upon querying this table, you want to showcase results like the following:

[[See Video to Reveal this Text or Code Snippet]]

However, the initial query you implemented produced the following incorrect output:

[[See Video to Reveal this Text or Code Snippet]]

The results are incorrect because the query mistakenly groups by both ID, CHANNEL_ID, and AMOUNT, leading to multiple entries instead of the expected single-row output per ID.

Analyzing the Original Query

Your original SQL query looked like this:

[[See Video to Reveal this Text or Code Snippet]]

The problem with this query arises from the grouping conditions. When we use GROUP BY, we need to clarify our intention — in this case, to generate a single result row per ID.

Crafting the Correct Query

To achieve the intended results — displaying both the total and subtotals in one row per ID — you'll want to restructure your SQL query. Here’s a corrected version of the query that produces the desired output:

[[See Video to Reveal this Text or Code Snippet]]

Breaking Down the Solution

Using SUM for Aggregation:

SUM(amount) AS grand_total calculates the overall total for each ID.

The SUM(CASE...) statements allow you to selectively sum amounts based on the channel IDs.

Grouping by ID:

The GROUP BY id ensures that results aggregate into a single row per unique ID.

Order Results:

The ORDER BY id clause sorts the final output by ID, enhancing readability.

Important Considerations

Using CASE within the SUM function is the standard approach in SQL Server since it does not support the FILTER clause that is available in standard SQL for aggregations.

Make sure that your data in the CHANNEL_AMOUNT table is clean and accurately reflects the different channel entries to avoid inconsistencies in your output.

Conclusion

Achieving a grand total alongside subtotals for different categories in SQL Server queries can initially seem tricky. However, with the appropriate understanding of grouping and aggregation, we can successfully format our data presentation. By restructuring our SQL command, we've enhanced our reporting capabilities significantly.

Feel free to integrate this adjusted SQL query into your reporting mechanism to elevate your data insights!

Видео How to Get the Grand Total and Subtotal in One Row in SQL Server канала vlogize