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Union all operator
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- Article · SQL Server
UNION And UNION ALL SQL Operators
The primary difference between UNION and UNION ALL is union operation eliminates the duplicated rows from the result set, but union all returns all rows after.
- Article · SQL Server
Union and Union All Operator in SQL Server 2012
Learn how SQL Server UNION and UNION ALL combine query results, handle duplicate rows, and differ from each other.
