17.00 - 17.05 - Example: Determining Employee Salary Increases - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
Release Number
June 2020
English (United States)
Last Update

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.