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Workarounds for the LIMIT Clause in Older Microsoft SQL Server Versions
Microsoft SQL Server 2000 lacked the ROW_NUMBER()
function, making it difficult to replicate the LIMIT
clause's functionality found in databases like MySQL. Several methods exist, each with drawbacks.
Nested queries using TOP
are a common approach. However, this method fails when the desired range exceeds the total number of rows, causing pagination errors, especially on the final "page."
Another technique relies on a unique column within the table. This is inherently limited, as it depends on the existence of a suitable unique identifier.
For SQL Server 2005 and later, the EXCEPT
statement offers a more robust solution. This involves combining nested queries with the EXCEPT
operator to filter out the initial rows, effectively achieving the desired subset.
Illustrative Example: To retrieve rows 50 through 75:
<code class="language-sql">SELECT * FROM ( SELECT TOP 75 COL1, COL2 FROM MYTABLE ORDER BY COL3 ) AS foo EXCEPT SELECT * FROM ( SELECT TOP 50 COL1, COL2 FROM MYTABLE ORDER BY COL3 ) AS bar;</code>
In summary, while workarounds exist for mimicking LIMIT
in SQL Server 2000, none perfectly replicate its behavior without compromises or reliance on additional features. For versions supporting ROW_NUMBER()
(SQL Server 2005 and later), using that function is the recommended and most effective method.
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