Analiasis used in SQL to give atemporaryname to a table or column within a query. It makes queries more readable and helps in cases where a table needs to be referenced multiple times (e.g., in aself-join).

Example Usage:

sql

SELECT e.Name, d.DepartmentName

FROM Employees AS e

JOIN Departments AS d

ON e.DeptID = d.ID;

Here,Employees is aliased as eandDepartments as d, making the query shorter and clearer.

Why Other Options Are Incorrect:

Option A (HAVING) (Incorrect):Used to filter grouped results, not create aliases.

Option B (NEW) (Incorrect):Not a valid SQL keyword for aliasing.

Option D (UNION) (Incorrect):Combines result sets but does not rename tables.

Thus, the correct answer isALIAS, which allows fortemporary naming of tables or columns.