Question

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ROW_NUMBER() without over in SQL

I have a grid with sorting on each column and have to show only 50 rows at a time.

I am using sql server 2005 as database.

Now there is ROW_NUMBER function in sql server 2005 to filter the data with row number but Over(order by [Column]) is mandatory to use. In my case I have to sort my grid with different columns so I can not use the static columns name in order by clause. The restriction is , I have to use static query.

Can you guys help me out on this problem?

Answer 1

Use several ROW_NUMBER clauses per column and choose the relevant one:

....
    ROW_NUMBER() OVER (ORDER BY [Column1]) as rn1,
    ROW_NUMBER() OVER (ORDER BY [Column2]) as rn2,
    ROW_NUMBER() OVER (ORDER BY [Column3]) as rn3,
    ROW_NUMBER() OVER (ORDER BY [Column4]) as rn4
....

OR use a CASE expression. Note: all datatypes must be compatible

ROW_NUMBER() OVER (ORDER BY CASE @sort
                     WHEN 1 THEN [Column1]
                     WHEN 1 THEN [Column2]
                     WHEN 1 THEN [Column3]
                     ...
                   END

OR If you really want an arbitrary row number then do this:

ROW_NUMBER() OVER (ORDER BY (SELECT 1)) as rn