How to Use TSQL Lead and Lag Functions in SQL Server

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In this episode, I’ll explain how to use the T-SQL Lead and Lag functions in SQL Server. This techniques is very handy for situations where you need to put values from the next or previous rows onto the current row for things like calculations in analytics, or just for workflow. If you ever needed to code this functionality on a platform that did not support such a function, you will definitely appreciate how easy it is to do here.

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#TSQL #LeadandLagFunctions #SQL #SQLserver

  1. Sean MacKenzie Data Engineering
  2. TSQL lead and lag functions in SQL server
  3. tsql lead
  4. tsql lag
  5. tsql get value from previous row
  6. tsql get value from next row
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Комментарии
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Very cool. Been using MSSQL for ten years and had never even heard of these before!
Am going through your back catalog and appreciating these great gems!

TubeDude
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Hi Sean, your video was super helpful in making me understand how lag works. I have a follow up question, am I able to use several columns in the partition? And how does adding addtl columns affect the lag output?

unusualsweets