[Solved] What does the SQL function NTILE(n) do when applied to a dataset? — Ans: It divides the dataset into n groups with roughly equal number of rows. | SQL

SQL - Window Functions Fundamentals

What does the SQL function NTILE(n) do when applied to a dataset?

AIt filters rows based on a condition.

BIt sorts the dataset in ascending order.

CIt counts the total number of rows in the dataset.

DIt divides the dataset into <code>n</code> groups with roughly equal number of rows.

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of NTILE
NTILE divides rows into a specified number of groups, distributing rows as evenly as possible.
Step 2: Compare options with NTILE behavior
Only It divides the dataset into n groups with roughly equal number of rows. correctly describes this grouping behavior; others describe different SQL functions.
Final Answer:
It divides the dataset into n groups with roughly equal number of rows. -> Option D
Quick Check:
NTILE splits data into equal groups = It divides the dataset into n groups with roughly equal number of rows. [OK]

Quick Trick: NTILE splits rows into equal groups by number [OK]

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What does the SQL function NTILE(n) do when applied to a dataset?