16.20 - Example: Determining Employee Salary Increases - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
March 2019
Programming Reference

You want to raise the salary for each employee in department 600 by $200 for each year spent with the company (up to a maximum of $2500 per month).

To determine who is eligible, and the new salary, enter the following statement:

   SELECT Name, (Salary+(YrsExp*200))/12 AS Projection
   FROM Employee 
   WHERE Deptno = 600 
   AND Projection < 2500 ;

This statement returns the following response:

   Name        Projection
   --------    ----------
   Newman P       2483.33

The statement uses parentheses to perform the operation YrsExp * 200 first. Its result is then added to Salary and the total is divided by 12.

The parentheses enclosing YrsExp * 200 are not strictly necessary, but the parentheses enclosing Salary + (YrsExp * 200) are necessary, because, if no parentheses were used in this expression, the operation YrsExp * 200 would be divided by 12 and the result added to Salary, producing an erroneous value.

The phrase AS Projection in this example associates the arithmetic expression (Salary + (YrsExp * 200)/12) with Projection. Using the AS phrase lets you use the name Projection in the WHERE clause to refer to the entire expression.

The result is formatted without a comma separating thousands from hundreds.