Question

Suppose I have a table that has three integer fields and one string field (just data).

For example it looks like:

Id      Category    Value   Data
1       1           3       ...
2       1           4       ...
3       2           2       ...
4       2           4       ...
5       3           5       ...
6       3           6       ...
7       3           2       ...
8       4           1       ...

What I want to do is for each Category, include the row with the minimum Value field in the result set. In this case, it would return:

Id      Category    Value   Data
1       1           3       ...
3       2           2       ...
7       3           2       ...
8       4           1       ...

How to write such a query?

Thanks!

Answer 1

select T1.Id,
       T1.Category,
       T1.Value,
       T1.Data
from YourTable as T1
  inner join (
               select Category,
                      min(Value) as Value
               from YourTable
               group by Category
             ) as T2
    on T1.Category = T2.Category and
       T1.Value = T2.Value