Question

i have three SQL server tables like this

i need to select the categories from LS_categoires where nodeid = 183 and select only 5 files from LS_files that related to each category was selected

if i have two categories related to node 183 the result should be 10 rows
is that possible ?

Answer 1

Try this:

  SELECT
  *  
FROM LS_Categories c 
INNER JOIN
( 
   SELECT 
     *, ROW_NUMBER() OVER(PARTITION BY catid
                          ORDER BY item_id ASC) rownum
   FROM LS_ItemTypes
) l  ON c.catid = l.catid
    AND l.rownum <= 5
INNER JOIN LS_Files f ON l.item_id = f.id
where c.nodeid = 183;

This will select first files for each category.