Valued CASE Expression Examples | Teradata Vantage - 17.10 - Example: Calculating the Fraction of Cost - Advanced SQL Engine - Teradata Database

The following example uses a Valued CASE expression to calculate the fraction of cost in the total cost of inventory represented by parts of type ‘1’:

   SELECT SUM(CASE part
               WHEN '1' 
               THEN cost
               ELSE 0
              END
             )/SUM(cost)
   FROM t;