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SQL Alias

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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:

Table Employees:

LastName FirstName
Hansen Ola
Svendson Tove
Pettersen Kari


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