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With SQL, aliases can be used for column names and table names.
通过SQL语句,可以将返回结果的栏目名或是表名重命名
语法:
SELECT column AS column_alias FROM table |
语法:
SELECT column FROM table AS table_alias |
Person数据表:
| LastName | FirstName | Address | City |
|---|---|---|---|
| Hansen | Ola | Timoteivn 10 | Sandnes |
| Svendson | Tove | Borgvn 23 | Sandnes |
| Pettersen | Kari | Storgt 20 | Stavanger |
SQL语句为:
SELECT LastName AS Family, FirstName AS Name |
返回的结果为:
| Family | Name |
|---|---|
| Hansen | Ola |
| Svendson | Tove |
| Pettersen | Kari |
Person数据表:
| LastName | FirstName | Address | City |
|---|---|---|---|
| Hansen | Ola | Timoteivn 10 | Sandnes |
| Svendson | Tove | Borgvn 23 | Sandnes |
| Pettersen | Kari | Storgt 20 | Stavanger |
SQL语句:
SELECT LastName, FirstName |
返回的结果为:
表名换成了Employees:
| LastName | FirstName |
|---|---|
| Hansen | Ola |
| Svendson | Tove |
| Pettersen | Kari |
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