Beginner LevelSQL & MySQL
What are Temporary Tables (CREATE TEMPORARY TABLE) and session scopes?
❓ Interview Prompt: Explain `CREATE TEMPORARY TABLE`, session scoping, automatic dropping on disconnect, and intermediate data processing.
A Temporary Table ('CREATE TEMPORARY TABLE') stores intermediate query results accessible only within the current database connection session:
Key Properties:
•
Invisible to other concurrent database user sessions.
•
Automatically dropped when the session disconnects or closes.
•
Useful for staging complex multi-step data transformations without polluting global schemas.
Code Implementation Example
sql
CREATE TEMPORARY TABLE temp_monthly_sales (
user_id INT PRIMARY KEY,
total_spent DECIMAL(10, 2)
);
INSERT INTO temp_monthly_sales
SELECT user_id, SUM(total_amount)
FROM orders
WHERE order_date >= '2026-01-01'
GROUP BY user_id;💡Staging intermediate data in a session-scoped Temporary Table.
🎯 Interview Key Takeaway
Use Temporary Tables to stage intermediate processing results isolated to the current database session.
#SQL#Temporary Tables#Session Scope#Beginner
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