Sample chapter: T-SQL Querying: TOP and OFFSET-FETCH


This chapter from T-SQL Querying starts with the logical design aspects of the filters. It then uses a paging scenario to demonstrate their optimization. The chapter also covers the use of TOP with modification statements. Finally, the chapter demonstrates the use of TOP and OFFSET-FETCH in solving practical problems like top N per group and median.

Classic filters in SQL like ON, WHERE, and HAVING are based on predicates. TOP and OFFSET-FETCH are filters that are based on a different concept: you indicate order and how many rows to filter based on that order. Many filtering tasks are defined based on order and a required number of rows. It’s certainly good to have language support in T-SQL that allows you to phrase the request in a manner that is similar to the way you think about the task.

This chapter starts with the logical design aspects of the filters. It then uses a paging scenario to demonstrate their optimization. The chapter also covers the use of TOP with modification statements. Finally, the chapter demonstrates the use of TOP and OFFSET-FETCH in solving practical problems like top N per group and median.

Read the complete chapter here: https://www.microsoftpressstore.com/articles/article.aspx?p=2314819.

Comments (0)

Skip to main content