[Solved] You need to frequently generate reports showing total sales by region, but sometimes want to filter regions... Which SQL feature best supports this flexible reuse without creating permanent objects? | SQL

SQL - Common Table Expressions (CTEs)

You need to frequently generate reports showing total sales by region, but sometimes want to filter regions with sales over 10000. Which SQL feature best supports this flexible reuse without creating permanent objects?

ACreate a permanent view with the sales aggregation and filter in the reports

BUse a Common Table Expression (CTE) to define total sales and apply filters as needed

CWrite nested subqueries each time with the filter applied

DUse a temporary table to store sales data and filter it

Step-by-Step Solution

Solution:

Step 1: Identify need for flexible reuse without permanent objects
CTEs provide temporary named result sets reusable within a query.
Step 2: Evaluate options
Permanent views create stored objects; nested subqueries reduce readability; temporary tables require extra management.
Final Answer:
Use a Common Table Expression (CTE) to define total sales and apply filters as needed -> Option B
Quick Check:
CTEs enable flexible, temporary reusable query parts [OK]

Quick Trick: CTEs allow flexible filtering without permanent objects [OK]

Common Mistakes:

Choosing views which are permanent
Rewriting nested subqueries repeatedly
Using temporary tables unnecessarily

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More SQL Quizzes

Which SQL feature best supports this flexible reuse without creating permanent objects?

Step 1: Identify need for flexible reuse without permanent objects

Step 2: Evaluate options

Final Answer:

Quick Check:

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