21st Example - Count the Average and Categorizes on PL/SQL

On an assessment will be obtained many different values​​. Those values ​​can be calculated mean values​​. The average value can be grouped into certain groups. Suppose there are found 5 values 60,70,80,90,50. The summarized values can be calculated the average score is 70. Defined 3 categories, LOW if the average value of <60, MID if the average value of 60-85 and HIGH if the average value of> 85. The following PL/SQL block to perform the calculation:


        n1 NUMBER;

        n2 NUMBER;

        n3 NUMBER;

        n4 NUMBER;

        n5 NUMBER;

        rata NUMBER;

        kat VARCHAR2(8);--LOW/MID/HIGH


        n1 := 60;

        n2 := 70;

        n3 := 80;

        n4 := 90;

        n5 := 50;

        rata := (n1+n2+n3+n4+n5)/5;

        IF rata > 85 THEN

           kat := 'HIGH';

        ELSIF rata BETWEEN 60 AND 85 THEN

           kat := 'MID';


           kat := 'LOW';

        END IF;

        DBMS_OUTPUT.PUT_LINE (The category is  '||kat);



There are 5 variables n1, n2, n3, n4, n5. Average variable will summarized values and then divided by five to obtain the average value. Checking category performed using conditional statements IF .. END IF. For the case above, the output shown is "The category is MID".

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