SQL Alias

















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SQL Aliases




With SQL, aliases can be used for column names and table names.


Column Name Alias

The syntax is:


SELECT column AS column_alias FROM table




Table Name Alias

The syntax is:


SELECT column FROM table AS table_alias



Example: Using a Column Alias
This table (Persons):


LastName
FirstName
Address
City


Hansen
Ola
Timoteivn 10
Sandnes


Svendson
Tove
Borgvn 23
Sandnes


Pettersen
Kari
Storgt 20
Stavanger


And this SQL:



SELECT LastName AS Family, FirstName AS Name
FROM Persons



Returns this result:


Family
Name


Hansen
Ola


Svendson
Tove


Pettersen
Kari




Example: Using a Table Alias
This table (Persons):


LastName
FirstName
Address
City


Hansen
Ola
Timoteivn 10
Sandnes


Svendson
Tove
Borgvn 23
Sandnes


Pettersen
Kari
Storgt 20
Stavanger


And this SQL:



SELECT LastName, FirstName
FROM Persons AS Employees



Returns this result:


LastName
FirstName


Hansen
Ola


Svendson
Tove


Pettersen
Kari







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