How to Efficiently Implement Row Offsets in SQL Server?

Offset rows in SQL Server

Standard SQL syntax does not directly support retrieving results starting from a specified offset. Unlike other database systems that provide an OFFSET clause, SQL Server requires a different approach to achieve similar functionality without extracting unnecessary rows.

SQL Server 2005 and above

For 2005 and above, you can use the ROW_NUMBER() function in combination with a derived table and a WHERE clause to efficiently offset the results. An example is as follows:

<code class="language-sql">SELECT col1, col2 
FROM (
    SELECT col1, col2, ROW_NUMBER() OVER (ORDER BY ID) AS RowNum
    FROM MyTable
) AS MyDerivedTable
WHERE MyDerivedTable.RowNum BETWEEN @startRow AND @endRow</code>

In this query, the ROW_NUMBER() function assigns a sequence number to each row based on the ID column to ensure correct sorting.

SQL Server 2000

For SQL Server 2000, you can explore other technologies such as:

• Efficient paging for large result sets in SQL Server 2000: This article guides how to use stored procedures to implement row offsets.
• A more efficient way to paginate large result sets: This blog post provides a solution using the ROW_NUMBER() function and subqueries, similar to the method in SQL Server 2005.

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