SQL Server Closing Stock values to opening stock of Next month

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SQL Server Closing Stock values to opening stock of Next month



I have a stock table contains three columns: Month, Year and Closing Stock like this:


Month Year CLosingstock
------------------------------
Jan 2017 10
Feb 2017 20
Mar 2017 30
Dec 2017 40
Jan 2018 50
Feb 2018 60



I want to create the new column of Opening stock and the jan 2017 values(10) should be a opening stock to Feb 2017.So How i place the values and other months opening stock to closing stock of next month.




1 Answer
1



Use the window function LAG(). I am assuming your Month is a integer and not string


LAG()


Month


select *, OpeningStock = LAG(ClosingStock) OVER (ORDER BY Year, Month)
from YourTable






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