Solution:Step 1: Analyze each option for errorsNot refreshing the materialized view after data changes causes stale data but no error. Using REFRESH MATERIALIZED VIEW without CONCURRENTLY is allowed but locks the view during refresh. Creating the materialized view without a SELECT statement is inval

[Solved] Consider this SQL:CREATE MATERIALIZED VIEW recent_orders AS SEL... REFRESH MATERIALIZED VIEW recent_orders;Which of the following is a common mistake that would cause an error or unexpected behavior? | PostgreSQL

PostgreSQL - Views and Materialized Views

Consider this SQL:

CREATE MATERIALIZED VIEW recent_orders AS SELECT * FROM orders WHERE order_date > CURRENT_DATE - INTERVAL '7 days';
REFRESH MATERIALIZED VIEW recent_orders;

Which of the following is a common mistake that would cause an error or unexpected behavior?

AUsing REFRESH MATERIALIZED VIEW without CONCURRENTLY

BCreating the materialized view without a SELECT statement

CNot refreshing the materialized view after data changes

DUsing CURRENT_DATE in the WHERE clause

Step-by-Step Solution

Solution:

Step 1: Analyze each option for errors
Not refreshing the materialized view after data changes causes stale data but no error. Using REFRESH MATERIALIZED VIEW without CONCURRENTLY is allowed but locks the view during refresh. Creating the materialized view without a SELECT statement is invalid syntax because materialized views require a SELECT query. Using CURRENT_DATE in the WHERE clause is valid usage.
Step 2: Identify the syntax error
Creating a materialized view without a SELECT statement causes a syntax error, so Creating the materialized view without a SELECT statement is the mistake causing error.
Final Answer:
Creating the materialized view without a SELECT statement -> Option B
Quick Check:
Materialized view requires SELECT query [OK]

Quick Trick: Materialized views must have a SELECT query [OK]

Common Mistakes:

Skipping the SELECT query in CREATE MATERIALIZED VIEW
Ignoring need to refresh after data changes
Assuming REFRESH must use CONCURRENTLY always

Master "Views and Materialized Views" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Consider this SQL:

Step 1: Analyze each option for errors

Step 2: Identify the syntax error

Final Answer:

Quick Check:

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