What is Rank Function in Structured Query Language (SQL)?
What is Rank Function in SQL?
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Chapters:
00:00 Introduction
00:05 What is the RANK Function in SQL?
00:10 Purpose and Basics of the RANK Function in SQL
00:16 How RANK Function Assigns Ranks in SQL
00:24 Example Scenario: Ranking Based on Sales Units in SQL
00:31 Setting Up the RANK Function in SQL
00:37 Using PARTITION BY for Grouping in SQL
00:46 Using ORDER BY for Sorting in SQL
00:52 Practical Example with Data Table
00:57 Ranking within Specific Regions
01:03 Troubleshooting: Incorrect Outputs
01:10 Handling Data Types and Errors in SQL
01:18 Sorting Order: Ascending vs. Descending in SQL
01:26 Handling Duplicate Values in Ranking in SQL
01:32 Detailed Example with Duplicate Values
01:38 Conclusion and Summary
In this video from Educate Cube, the RANK function is explained as a window function used to assign ranks to rows within a result set based on values in one or more columns. It is especially useful for ranking data within groups.
Key points covered:
RANK Function: Assigns ranks based on specified order and grouping.
Syntax: `RANK() OVER (PARTITION BY column ORDER BY column [ASC|DESC])`.
Application: Demonstrates ranking sales units within different regions, sorting and handling ties.
Handling Ties: Duplicate values receive the same rank, and the next rank is skipped.
The video includes practical examples and explains how to correctly use the RANK function for accurate results.
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