MYSQL - select TABLE A rows that are not in Table B except the rows are in TABLE C

Question

TABLE A:

dvdID.......dvdTitle

d01..........Avenger

d02..........Avenger

d03..........Spiderman

TABLE B:

rentID.......dvdID

r01...........d01

r02...........d02

r03...........d03

TABLE C:

returnID.......rentID

t01...............r01

i want to select dvd that not in Table B (rented) except it in Table C (returned) so the output should be like this:

OUTPUT:

dvdID.......dvdTitle

d01..........Avenger

could you help me?

Answer 1

Try this,

SELECT *
FROM A 
WHERE (NOT EXISTS (SELECT * FROM B WHERE B.dvdID=A.dvdID))
   OR (EXISTS (SELECT * FROM C,B WHERE C.rentID=B.rentID and B.dvdID=A.dvdID))

here is SQLFiddle

Answer 2

You can use existential quantifiers in your SQL conditions, represented by the EXISTS keyword:

SELECT *
FROM TableA a
WHERE NOT EXISTS (        -- No rental record
    SELECT *
    FROM TableB b
    WHERE b.dvdID=a.dvdID -- The record is for this DVD, and...
      AND NOT EXISTS (    -- ...there is no return record
          SELECT * FROM TableC c WHERE c.rentID=b.rentID
      )
)

The query reads almost like a poorly constructed English sentence, but it explains what is going on.

Answer 3

From your sample data set it is clear that you need the dvds whose rent exists in TableC for this you can do so a simple INNER join ,last join from table3 will satisfy the rent exist condition for a dvd from table1

select t1.* FROM
Table1 t1
LEFT JOIN Table2 USING(dvdID)
JOIN Table3 USING(rentID)

Fiddle Demo

Answer 4

try this Option 1

select * from A 
where dvdID not in (Select dvdID from B where rentID not in (select rentID from C))

Answer 5

You should use JOINS instead of EXISTS / NOT EXISTS

SELECT 
    a.*
FROM TableA a
    LEFT join TableB b
        on b.id=a.id
    LEFT Join TableC c 
        on c.id=a.id
WHERE
    b.id is null 
    OR (b.id is not null AND c.id is not null)

Answer 6

Try this:

SELECT TableA.dvdID, TableA.dvdTitle 
FROM TableA
LEFT JOIN TableB ON TableA.dvdID = TableB.dvdID
LEFT JOIN TableC ON TableC.rentID = TableB.rentID
WHERE TableB.rentID IS NULL
   OR (TableB.rentID IS NOT NULL
       AND TableC.returnID IS NOT NULL)