Concatenation Showplan Operator

The Concatenation operator scans multiple inputs, returning each row scanned. Concatenation is typically used to implement the Transact-SQL UNION ALL construct.

The Concatenation physical operator has two or more inputs and one output. Concatenation copies rows from the first input stream to the output stream, then repeats this operation for each additional input stream.

Concatenation is a logical and physical operator.

Concatenation operator iconGraphical execution plan icon

See Also


How to: Display an Actual Execution Plan


Logical and Physical Operators Reference
Displaying Execution Plans by Using the Showplan SET Options (Transact-SQL)

Other Resources

Concatenation Operators
UNION (Transact-SQL)

Help and Information

Getting SQL Server 2005 Assistance