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SQL Alias
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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