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SQL OFFSET and FETCH Usage
essentialsql.com/using-offset-and-fetch-with-the-order-by-clause/Yapay zekadan makale özeti
- Basic Concepts
- OFFSET and FETCH work with ORDER BY to retrieve record ranges
- OFFSET determines starting row, FETCH controls maximum number of rows
- OFFSET must be zero or greater, negative values cause errors
- Main Uses
- Paging allows displaying results in sliding window format
- Top records can be fetched using OFFSET=0 and FETCH=10
- Bottom records require descending order or subquery with count
- Middle data sampling possible using same logic as paging
- Technical Details
- OFFSET and FETCH must be used with ORDER BY clause
- Results are produced after data is sorted
- Negative OFFSET values cause errors
- OFFSET=0 skips all rows, FETCH=0 returns all rows