T-SQL Power! Windows That Open Doors Adam

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Presentation transcript:

T-SQL Power! Windows That Open Doors Adam

T-SQL POWER! © 2016 Adam Machanic Adam Machanic Consultant Boston, MA and Beyond Speaker PASS, TechEd, Connections … Writer Books, magazines, web sites Founder

T-SQL POWER! © 2016 Adam Machanic Agenda Background Lots of Demos(That’s it.)

T-SQL POWER! © 2016 Adam Machanic Windowing and Framing … … Frames – as many as you need

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Partitioning and Framing Rows ROWS BETWEEN 1 PRECEDING AND CURRENT ROW ROWS BETWEEN 3 PRECEDING AND 2 FOLLOWING

T-SQL POWER! © 2016 Adam Machanic Commonly Used Window Function Types Ranking ROW_NUMBER RANK DENSE_RANK Analytic Offset LAG LEAD Aggregate SUM AVG COUNT MIN MAX Analytic Framed FIRST_VALUE LAST_VALUE

T-SQL POWER! © 2016 Adam Machanic Query Processor Iterators of Interest

T-SQL POWER! WINDOWS THAT OPEN DOORS demo

T-SQL POWER! © 2016 Adam Machanic Summary Window functions make complex T-SQL much easier Performance, on the other hand, is up to you Be creative! There are endless use cases for these features Beware of RANGE mode