Each column in a SELECT result has a name that is derived from the list of specified column names (expressions) that generated the data. The name is typically the column name from which the data came.
For example, the columns in the result
SELECT EmpNo, Name FROM Employee;
are labeled EmpNo and Name by default.
In some cases, it is necessary to associate a column name that is different from the default column name with a result. Teradata Database provides two ways to name a column.
|This phrase for naming …||Is …|
|NAMED||a Teradata extension to the ANSI SQL:2011 standard.|
|AS||ANSI SQL:2011 compliant.|