Solution:Step 1: Check window frame syntaxThe frame clause must specify ROWS or RANGE explicitly before frame boundaries.Step 2: Identify error causeThe query has ORDER BY name BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW, missing the required ROWS or RANGE keyword before BETWEEN.Final Answer:The win

[Solved] Consider this query:SELECT name, salary, SUM(salary) OVER w FROM employees WINDOW w AS (PARTITION BY department ORDER BY name BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW);It returns an error.... | PostgreSQL

PostgreSQL - Window Functions in PostgreSQL

Consider this query:

SELECT name, salary, SUM(salary) OVER w
FROM employees
WINDOW w AS (PARTITION BY department ORDER BY name BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW);

It returns an error. What is the likely cause?

AThe window frame clause requires ROWS or RANGE keyword explicitly

BThe window frame clause is invalid without RANGE keyword

CThe WINDOW clause must come after ORDER BY clause

DThe window name cannot be used in the OVER clause

Step-by-Step Solution

Solution:

Step 1: Check window frame syntax
The frame clause must specify ROWS or RANGE explicitly before frame boundaries.
Step 2: Identify error cause
The query has ORDER BY name BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW, missing the required ROWS or RANGE keyword before BETWEEN.
Final Answer:
The window frame clause requires ROWS or RANGE keyword explicitly -> Option A
Quick Check:
Window frame needs ROWS or RANGE keyword [OK]

Quick Trick: Always specify ROWS or RANGE in window frame [OK]

Common Mistakes:

Placing WINDOW clause after ORDER BY
Omitting ROWS or RANGE keyword
Using window name incorrectly in OVER

Master "Window Functions in PostgreSQL" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Consider this query:

Step 1: Check window frame syntax

Step 2: Identify error cause

Final Answer:

Quick Check:

Want More Practice?