Question

I have this code from another post :

SELECT bar
  FROM (SELECT S.subcategoryname As bar, 
               C.CategoryName AS SortName,
               ROW_NUMBER() OVER (PARTITION BY C.CategoryName 
                                      ORDER BY subcategoryname) As RowNum
          FROM category C 
     LEFT JOIN subCategory S ON C.CategoryID = S.CategoryID 
        UNION ALL
        SELECT C.CategoryName As bar, 
               C.CategoryName AS SortName, 
               0
          FROM category C) foo
ORDER BY foo.SortName, RowNum

It works, but how can I retrieve more than just categoryName and subCategoryName. Is there a way to retrieve data from all columns?

my code:

select  * from (select s.titlu_subcerinta as bar,c.titlu_Cerinta As SortName, ROW_NUMBER() over(partition by c.titlu_Cerinta order by titlu_subcerinta) as RowNum
from cerinteProiect c left join subcerinteProiect s on c.id_cerinta = s.id_cerinta
UNION ALL
select c.titlu_Cerinta As bar, c.titlu_Cerinta As SortName,0
from cerinteProiect c
)
foo
order by
foo.SortName,RowNum

Answer 1

As OMG Ponies said, the first SELECT FROM is pulling data from foo. If you don’t return all columns from C in there, your outer query has no way to get them.

Expand both parts of your inner query to capture the whole table, like as follows:

SELECT * --grab everything you get in the subquery
  FROM (SELECT S.subcategoryname As bar, 
               C.* --note how this grabs EVERYTHING in Category, as you want
               ROW_NUMBER() OVER (PARTITION BY C.CategoryName 
                                      ORDER BY subcategoryname) As RowNum
          FROM category C 
     LEFT JOIN subCategory S ON C.CategoryID = S.CategoryID 
        UNION ALL
        SELECT C.CategoryName As bar, 
               C.*, --this grabs everything again
               0
          FROM category C) foo
ORDER BY CategoryName, RowNum --both of these come from foo - no need to specify it