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Union Union All

SQL UNION, UNION ALL

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The UNION ALL command combines the result set of two or more SELECT statements (allows duplicate values). The following SQL statement returns the cities ...

Difference between UNION and UNION ALL

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UNION and UNION ALL are SQL operators used to concatenate 2 or more result sets. This allows us to write multiple SELECT statements, retrieve the desired ...

What is the difference between UNION and UNION ALL? - Stack ...

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Sep 18, 2008 ... The basic difference between UNION and UNION ALL is union operation eliminates the duplicated rows from the result set but union all returns ...

UNION (Transact-SQL) - SQL Server | Microsoft Docs

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Aug 7, 2017 ... Concatenates the results of two queries into a single result set. You control whether the result set includes duplicate rows: UNION ALL - Includes ...

SQL Union vs Union All in SQL Server

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Apr 18, 2019 ... SQL Union All Operator Overview ... The SQL Union All operator combines the result of two or more Select statement similar to a SQL Union ...

SQL: UNION ALL Operator

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Description. The SQL UNION ALL operator is used to combine the result sets of 2 or more SELECT statements. It does not remove duplicate rows between the ...

UNION vs. UNION ALL in SQL Server

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Oct 29, 2019 ... UNION ALL. This operation again allows you to join multiple datasets into one dataset, but it does not remove any duplicate rows. Because this ...

The UNION [ALL], INTERSECT, MINUS Operators

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You can combine multiple queries using the set operators UNION , UNION ALL , INTERSECT , and MINUS . All set operators have equal precedence. If a SQL ...

Example UNION ALL query - Amazon Redshift

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Provides examples of how to use a UNION ALL query.

MySQL 5.7 Reference Manual :: 13.2.9.3 UNION Clause - MySQL

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UNION DISTINCT and UNION ALL. By default, duplicate rows are removed from UNION results. The optional DISTINCT keyword has the same effect but makes it  ...

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