[Solved] What result does this query produce?SELECT employee_id, salary, DENSE_RANK() OVER (ORDER BY salary ASC) AS rank FROM employees; | PostgreSQL

PostgreSQL - Window Functions in PostgreSQL

What result does this query produce?

SELECT employee_id, salary, DENSE_RANK() OVER (ORDER BY salary ASC) AS rank FROM employees;

AAssigns ranks to employees based on ascending salary, with no gaps in ranking

BAssigns ranks with gaps where salaries are tied

CCalculates cumulative salary totals per employee

DReturns employees ordered by salary without ranking

Step-by-Step Solution

Solution:

Step 1: Understand DENSE_RANK()
DENSE_RANK() assigns ranks without gaps for tied values.
Step 2: Analyze ORDER BY salary ASC
Ranks are assigned starting from lowest salary upwards.
Final Answer:
Assigns ranks to employees based on ascending salary, with no gaps in ranking -> Option A
Quick Check:
DENSE_RANK() gives consecutive ranks even if ties exist [OK]

Quick Trick: DENSE_RANK() avoids gaps in ranking [OK]

Common Mistakes:

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What result does this query produce?