SQL Server 2012 introduces new analytical function LEAD() and LAG(). This functions accesses data from a subsequent row (for lead) and previous row (for lag) in the same result set without the use of a self-join . It will be very difficult to explain this in words so I will attempt small example to explain [...]
Archive for November, 2011
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About Pinal Dave
Pinal Dave is a Microsoft Technology Evangelist (Database and BI). He has written over 2000 articles on the subject on his blog at http://blog.sqlauthority.com. Along with 8+ years of hands on experience he holds a Masters of Science degree and a number of certifications, including MCTS, MCDBA and MCAD (.NET). He is co-author of three SQL Server books - SQL Server Programming, SQL Wait Stats and SQL Server Interview Questions and Answers. Prior to joining Microsoft he was awarded Microsoft MVP award for three continuous years for his contribution in community.
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