Bird
0
0

Which scenario best shows why aggregation is useful in SQL?

easy📝 Conceptual Q2 of 15
SQL - Aggregate Functions
Which scenario best shows why aggregation is useful in SQL?
AChanging a customer's address
BAdding a new product to inventory
CCounting total customers from a customer list
DDeleting old orders
Step-by-Step Solution
Solution:

  1. Step 1: Identify aggregation use cases

    Aggregation is used to calculate totals or counts from many rows.

  2. Step 2: Match scenario to aggregation

    Counting total customers is a classic aggregation example using COUNT().

  3. Final Answer:

    Counting total customers from a customer list -> Option C

  4. Quick Check:

    Aggregation scenario = counting totals [OK]
Quick Trick: Aggregation answers 'how many' or 'how much' questions [OK]
Common Mistakes:
MISTAKES
  • Confusing aggregation with data modification
  • Choosing options about changing or deleting data

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SQL Quizzes
Aggregate Functions - Combining multiple aggregates - Quiz 8hard GROUP BY and HAVING - HAVING clause for filtering groups - Quiz 6medium INNER JOIN - How the join engine matches rows - Quiz 8hard INNER JOIN - Joining on primary key to foreign key - Quiz 12easy LEFT and RIGHT JOIN - LEFT JOIN preserving all left rows - Quiz 11easy Table Constraints - Foreign key ON DELETE behavior - Quiz 9hard Table Constraints - Foreign key ON UPDATE behavior - Quiz 10hard Views - CREATE VIEW syntax - Quiz 2easy Views - Querying through views - Quiz 6medium Views - Why views are needed - Quiz 3easy