SQL - As clause

Data System Architecture


The as sql clause renames a relation or the attribute of a relation.

This is a runtime operation and does not rename a table or a column. To rename a table or a column, the alter statement should be used.

This equivalent operator in relational algebra is the rename operator


select a as a1 from R as R1

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Relational Operator - Rename

Rename or (renaming) is a relational operator that rename: a relation or an attribute of the relation rename the attribute a from R to b as Rename the 4 attributes {A, B, A, C} resulting...

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