SQL Statement Join With CASE

Question

I have problem with this 3 table below from MS ACCESS to do \"SQL CASE IF ELSE\" where I don\'t how to start.

Table A (Registrations)

Name    | Desc              


        

Answer 1

It's not too clear from the question how TableA and TableB are related togheter, but it looks like you want a UNION ALL query and you want to exclude some categories:

SELECT
  c.Name,
  c.Year,
  c.Class,
  ab.Desc,
  ab.Amount
FROM
  TableC AS C INNER JOIN (
    SELECT * FROM TableA WHERE Desc NOT IN ('BOOKS', 'UNIFORM', 'OTHERS')
    UNION ALL
    SELECT * FROM TableB WHERE Desc NOT IN ('BOOKS', 'UNIFORM', 'OTHERS')
  ) AS ab
  ON c.Name = ab.Name AND c.Year = ab.Year

then you can use a Pivot using the previous query as a subquery:

TRANSFORM Sum(Amount) AS SumOfAmount
SELECT Name, Year, Class, Sum(Amount) AS [Sum_Amount]
FROM (

  ...the query above...

) AS s
GROUP BY Name, Year, Class
PIVOT Desc;