Unique Records
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How To Get Unique Records Without Using Distinct In SQL Server
In this guide, you'll learn how to retrieve unique records in SQL Server without using the DISTINCT keyword. We'll explore alternative methods like GROUP BY, ROW_NUMBER(), and Common Table Expressions (CTE) to optimize performance and handle duplicates more efficiently in your queries.
UNION vs UNION ALL in SQL Server
The SQL UNION operator combines the results of two or more SELECT statements, removing duplicate rows. In contrast, UNION ALL combines results while retaining all duplicates. UNION may impact performance due to the overhead of duplicate removal, whereas UNION ALL is generally faster and more resource-efficient.
