Question

We have a table which has three columns in it:

Customer_name, Age_range, Number_of_people.
1              1-5         10
1              5-10        15

We need to return all the number of people in different age ranges as rows of a single query. If we search for customer #1, the query should just return one row:

Header- Age Range (1-5)             Age Range (5-10)
        10                             15

We needed to get all the results in a single row; When I query for customer 1, the result should be only number of people in a single row group by age_range.

What would be the best way to approach this?

Answer 1

You need to manually perform a pivot:

  SELECT   SUM(CASE WHEN age_range = '5-10' 
                    THEN number_of_people 
                    ELSE NULL END) AS nop5,
           SUM(CASE WHEN age_range = '10-15' 
                    THEN number_of_people 
                    ELSE NULL END) AS nop10
    FROM   customers
   WHERE   customer_name = 1;