retrieve specific range of rows in a SQL Server table

Question

Hello everyone,

I have a table structure like (OrderID [uniqueidentifier], OrderDesciption [nvarchar]), I am using ADO.Net + C# + VSTS 2008 + SQL Server 2008. The table is big, and I want to let client give me two inputs, begin range index and end range index, and I will return specific rows of the table which is in the range (between begin range index and end range index).

For example, if the client inputs to me 50, 100, and I want to return the 50th row until the 100th row.

thanks in advance, George

Answer 1

Basically, your best bet in SQL Server 2005 and 2008 is a CTE - Common Table Expression - with a ROW_NUMBER() function in it - something like this:

WITH MyOrders AS
(
  SELECT
    OrderID,
    OrderDescription,
    ROW_NUMBER() OVER (ORDER BY OrderID) as 'RowNum'
  FROM YourOrders
)
SELECT * FROM MyOrders
WHERE RowNum BETWEEN 50 AND 100

But this requires a useful and suitable ORDER BY clause, and ordering by a GUID is really not a good idea. DATETIME or an ever-increasing ID would be best.

Marc

Answer 2

SELECT * FROM ( SELECT *, ROW_NUMBER() OVER (ORDER BY OrderId) as row FROM Orders) a WHERE row > 5 and row <= 10

Answer 3

You can use ROW_NUMBER in TSQL (2005 onwards) to do this:

SELECT  ID, Foo, Bar
FROM     (SELECT  ROW_NUMBER() OVER (ORDER BY ID ASC) AS Row,
          ID, Foo, Bar
FROM    SomeTable) tmp
WHERE   Row >= 50 AND Row <= 100

Or with LINQ-to-SQL etc:

var qry = ctx.Table.Skip(50).Take(50); // or similar

Answer 4

Try this, the result will be ordered by OrderID column. Change MyTable with your table.

SELECT * 
FROM ( SELECT *, ROW_NUMBER() OVER (ORDER BY OrderID) AS row FROM MyTable) a 
WHERE row > 50 AND row <= 100

The selected rows are from 50 to 100, but notice that the 50th row is not included in the result.

Answer 5

Here's the best comparison of ADO.NET paging techniques I've seen:

http://www.codeproject.com/KB/aspnet/PagingLarge.aspx

a little old but still worth reading

Answer 6

i tried the query SELECT * FROM ( SELECT *, ROW_NUMBER() OVER (ORDER BY item_number) AS row FROM t_item_master) a WHERE row > 6000 AND row <= 68908 but it returns many rows as usual not the expected rows between 6000 and 68908