The UNION operator is used to combine the result-set of two or more SELECT statements. The UNION operator automatically removes duplicate rows from the result set.

This tutorial shows you how to use the SQL UNION operator to combine the result sets of two queries into a single result set.

Feb 10, 2026 · The SQL UNION operator is used to combine the result sets of two or more SELECT queries into a single output. It removes duplicate rows and returns only unique records from all …

Nov 18, 2025 · Concatenates the results of two queries into a single result set. You control whether the result set includes duplicate rows: UNION ALL - Includes duplicates. UNION - Excludes duplicates. A …

May 6, 2024 · Just like union in set theory, UNION in SQL allows you to combine the result sets of separate SELECT queries. In this article, you will learn what UNION is, how it works, how to use it, …

Nov 30, 2025 · Using UNION with SQL queries is a great way to explore the power of databases like MySQL and SQL servers. UNION allows you to combine results from different SELECT statements …

This SQL tutorial explains how to use the SQL UNION operator with syntax and examples. The SQL UNION operator is used to combine the result sets of 2 or more SELECT statements.

What Is the SQL UNION Operator? The UNION operator combines the result sets of two or more SELECT statements, removing duplicate rows to produce a single, unique set of results.

Here, the SQL command selects the age column (only the unique values) from both tables where the age is greater than or equal to 20. The UNION ALL operator selects fields from two or more tables …

Sep 24, 2023 · It enables us to retrieve related data from different tables in a single query. Let’s see how this works with an example: But hold on! There’s something you need to remember while using …