📘 Episode 30: CTE vs TEMP TABLE in SQL | Which One Should You Use? | SQL Interview Lab
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📘 Episode 30: CTE vs TEMP TABLE in SQL | Which One Should You Use? | SQL Interview Lab
3 просмотра · 7 часов назад
Tiny Learn Hub
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3 просмотра · 7 часов назад
📘 SQL Interview Lab – Episode 30
Ever wondered whether you should use a CTE or a Temporary Table in SQL?
Both can work with intermediate results, but they are useful in different situations.
In this episode, we'll understand:
✅ CTE vs Temporary Table
✅ How a CTE works
✅ How a Temporary Table works
✅ Reusing a Temporary Table
✅ CTE vs Temp Table differences
✅ Temporary tables and indexes
✅ When to use a CTE
✅ When to use a Temporary Table
✅ Common SQL performance misconceptions
✅ Practical SQL Interview Challenge
💡 SIMPLE WAY TO REMEMBER
CTE
→ Named query step
TEMP TABLE
→ Reusable temporary data
🚨 IMPORTANT
Don't assume that a Temporary Table is always faster than a CTE.
Performance depends on the database engine, data size, query structure, indexes, execution plan and how the intermediate result is used.
🎯 EPISODE 30 CHALLENGE
Using Orders_30:
Find categories whose TOTAL SALES are greater than 100,000.
Return:
• Category
• TotalSales
First solve it using a CTE.
BONUS:
Solve the same requirement using a TEMP TABLE.
Pause the video and try solving it yourself before checking the pinned comment!
📘 SQL Interview Lab
Learn SQL one concept at a time.
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