Solution:Step 1: Analyze the WINDOW clauseThe window w orders rows by salary descending.Step 2: Understand RANK() OVER wRANK() assigns ranks to rows ordered by salary descending, with ties sharing rank.Final Answer:Rank of employees ordered by salary descending -> Option DQuick Check:RANK() OVER win

[Solved] Consider this query:SELECT employee, salary, RANK() OVER w AS rank FROM employees WINDOW w AS (ORDER BY salary DESC)What does the rank column represent? | PostgreSQL

PostgreSQL - Window Functions in PostgreSQL

Consider this query:

SELECT employee, salary, RANK() OVER w AS rank
FROM employees
WINDOW w AS (ORDER BY salary DESC)

What does the rank column represent?

ASalary multiplied by rank

BTotal number of employees

CRow number without ordering

DRank of employees ordered by salary descending

Step-by-Step Solution

Solution:

Step 1: Analyze the WINDOW clause
The window w orders rows by salary descending.
Step 2: Understand RANK() OVER w
RANK() assigns ranks to rows ordered by salary descending, with ties sharing rank.
Final Answer:
Rank of employees ordered by salary descending -> Option D
Quick Check:
RANK() OVER window = ordered rank [OK]

Quick Trick: RANK() respects window ORDER BY clause [OK]

Common Mistakes:

Confusing RANK() with ROW_NUMBER()
Ignoring ORDER BY in window
Assuming rank is a multiplication

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Consider this query:

Step 1: Analyze the WINDOW clause

Step 2: Understand RANK() OVER w

Final Answer:

Quick Check:

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