The UNION ALL operator is used to combine the result-set of two or more SELECT statements. The UNION ALL operator includes all rows from each statement, including any duplicates.

Nov 17, 2025 · UNION ALL Operator is used to combine the results of two or more SELECTstatements into a single result set. Unlike the UNION operator, which eliminates duplicate records and UNION …

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

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 …

When you need to combine results from two or more SELECT queries, SQL gives you two closely related operators: UNION and UNION ALL. They look similar but behave differently — especially …

SQL has a special operator UNION that lets you combine query results from different tables. There are two UNION operators in SQL - UNION and UNION ALL. Most of this article applies both to UNION …

Jul 21, 2025 · UNION and UNION ALL are essential SQL tools for combining query results. Whether you're aggregating records from partitions or unifying multi-system data, knowing how to use these …

What Is the SQL UNION ALL Operator? The UNION ALL operator combines the result sets of two or more SELECT statements into a single result set, preserving all rows, including duplicates.

Oct 1, 2025 · What Is UNION ALL in SQL? The UNION ALL operator also combines the results of two or more SELECT statements, but unlike UNION, it does not remove duplicate rows. All rows from each …

Sep 20, 2016 · UNION and UNION ALL come into play here. Both are handy tools for stacking the results of two or more SELECT statements on top of each other, but they handle repeats differently. …