This is from my old blog so dont give me credit for wirting something new 🙂
There is an alternative to TOP clause, which is to use ROWCOUNT. Use ROWCOUNT with care, as it can lead you into all sorts of problems if it’s not turned off.
SET ROWCOUNT 10 SELECT * from Customers ORDER BY CompanyName
WITH, ROW_NUMBER and OVER
This is new from SQL Server 2005 and onwards and looks really useful. Below is an example to get records 20 to 29 from a results set. It might a bit strange at first, but I will go through the query so you’ll see how simple it is.
With Cust AS ( SELECT CustomerID, CompanyName, ROW_NUMBER() OVER (order by CompanyName) as RowNumber FROM Customers ) select * from Cust Where RowNumber Between 20 and 30
The WITH in SQL Server 2005 onwards specifies a temporary named result (CTE), much like a temporary table in previous versions of SQL Server. However, the import parts are the ROW_NUMBER and the OVER statement, which create a row number on each row based on the Company name. This is like adding an identity seed to a temp table with an order by clause.
Look in books online for TABLESAMPLE as well but that does not necesaarily return top records.
2 Comments on “SQL Server: Alternatives to TOP clause – ROWCOUNT, ROW_NUMBER()”
I am just looking for an equivalent to top clause that follows where clause (something similar to Limit in Mysql). I require this to be used in another application to retriev the latest record from DB. The clause that comes next to select cant be used. Can you please help me.
I am looking for an equivalent to trunc function in sql server I require this to be used in another application to