Question

If I have a table with a schema like this

table(Category, SubCategory1, SubCategory2, Status)

I would like to group by Category, SubCategory1 and aggregate the Status such that
if not all Status values over the group have a certain value Status will be 0 otherwise 1.

So my result set will look like

(Category, SubCategory1, Status)

I don’t want to write a function. I would like to do it inside the query.

Answer 1

Assuming that status is a numeric data type, use:

  SELECT t.category, 
         t.subcategory1,
         CASE WHEN MIN(t.status) = MAX(t.status) THEN 1 ELSE 0 END AS status
    FROM dbo.TABLE_1 t
GROUP BY t.category, t.subcategory1