July 2012
Intermediate to advanced
816 pages
27h 38m
English
Content preview from Programming Microsoft® SQL Server® 2012Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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New T-SQL Functions in SQL Server 2012
The latest version of SQL Server augments T-SQL with many new functions. In this section, we cover the 22 new functions (and 1 changed function) introduced in SQL Server 2012. We’ll start by covering the new T-SQL analytic functions, because they operate using the same windowing principles we were just discussing.
New Analytic Functions
Eight new analytic functions have been added to T-SQL. All of them work in conjunction with an ordered window defined with an associated ORDER BY clause that can be optionally partitioned with a PARTITION BY clause and framed with a BETWEEN clause. The new functions are:
FIRST_VALUE
LAST_VALUE
LAG
LEAD
PERCENT_RANK
CUME_DIST
PERCENTILE_CONT
PERCENTILE_DISC
In Example 2-32, the FIRST_VALUE, ...
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