Скачать или смотреть MySQL Full Course For Absolute Beginners | Part 11

MySQL Full Course For Absolute Beginners | Part 11

Link to MySQL doc: https://dev.mysql.com/doc/refman/8.0/...

In this video, we talk about windowd functions.
A window function performs an aggregate-like operation on a set of query rows. However, whereas an aggregate operation groups query rows into a single result row, a window function produces a result for each query row.

Window functions are:
ROW_NUMBER()
FIRST_VALUE()
NTH_VALUE()
LAST_VALUE()
RANK()
DENSE_RANK()
PERCENT_RANK()
LAG()
LEAD()
CUME_DIST()
NTILE()

00:00 Introduction
02:12 Aggregation functions as window functions
06:11 ROW_NUMBER()
10:21 FIRST_VALUE()
15:08 LAST_VALUE()
18:49 NTH_VALUE()
21:46 LEAD()
23:22 LAG()
26:48 NTILE()
29:00 RANK(), DENSE_RANK() and PERCENT_RANK()
32:55 CUME_DIST()

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