Question

Please refer below script

            declare @table1 table
            (
            col1 int
            )  

            insert into @table1 values(1)
            insert into @table1 values(3)
            insert into @table1 values(3)
            insert into @table1 values(6)
            insert into @table1 values(4)
            insert into @table1 values(4)
            insert into @table1 values(4) 

The below query gives

            select col1 ,COUNT(col1) cntCol1 from @table1 group by col1

this output

            ----------------
            col1   | cntCol1
            -------| -------
            | 1    | 1    | 
            | 3    | 2    | 
            | 4    | 3    | 
            | 6    | 1    | 
            ---------------

is it possible to get the below output

            ----------------
            col1   | cntCol1
            -------| -------
            | 1    | 1    | 
            | 3    | 1    | 
            | 3    | 2    |  
            | 4    | 1    |  
            | 4    | 2    |  
            | 4    | 3    | 
            | 6    | 1    | 
            ---------------

If so, could you please help me with the query.

Thanks,
Esen.

Answer 1

SQL Fiddle

      SELECT col1, ROW_NUMBER() OVER (partition by col1 order by col1) cntCol1
        FROM @table1
    ORDER BY col1, cntCol1    

Sample Data:

 declare @table1 table
            (
            col1 int
            )  

            insert into @table1 values(1)
            insert into @table1 values(3)
            insert into @table1 values(3)
            insert into @table1 values(6)
            insert into @table1 values(4)
            insert into @table1 values(4)
            insert into @table1 values(4) 

Results:

| COL1 | CNTCOL1 |
------------------
|    1 |       1 |
|    3 |       1 |
|    3 |       2 |
|    4 |       1 |
|    4 |       2 |
|    4 |       3 |
|    6 |       1 |