SQL Trick | Compare Current Month's Sale with 1st Month's Sale | LAG | OFFSET | Windows Functions

In this SQL Trick, we use the Windows LAG Function and its Offset property to Compare Current Month's Sale with the Sale of the 1st Month in the Same Year.

You can check detailed explanation in the below video tutorial -
https://www.youtube.com/watch?v=CDGwVXknZXI

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Видео SQL Trick | Compare Current Month's Sale with 1st Month's Sale | LAG | OFFSET | Windows Functions канала Learn at Knowstar