Recall & Review
beginner
What is a SQL view?
A SQL view is like a saved query. It shows data from one or more tables but does not store data itself. It acts like a virtual table.
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beginner
How does a view help simplify complex queries?
A view saves a complex query so you can use it easily later. You just select from the view instead of writing the full query again.
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intermediate
Can you update data through a view?
Sometimes yes, if the view is simple and directly maps to one table. But if the view joins many tables or uses aggregation, updates usually are not allowed.
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beginner
What happens when you query a view?
The database runs the saved query behind the view and shows the results as if it was a table.
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beginner
Why use views instead of tables?
Views help keep data safe by hiding columns or rows. They also make queries easier and keep your database organized.
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What does a SQL view store?
✗ Incorrect
A view stores the query definition, not the actual data.
Which of these is true about views?
✗ Incorrect
Views save complex queries so you can use them easily.
Can you update data through any view?
✗ Incorrect
Updates through views are allowed only if the view is simple and directly linked to one table.
What is the main benefit of using a view?
✗ Incorrect
Views hide complex queries and make it easier to access data.
When you select from a view, what happens?
✗ Incorrect
Selecting from a view runs the saved query and shows the results.
Explain what a SQL view is and how it works as a saved query.
Think of a view as a shortcut to a query.
You got /4 concepts.
Describe the benefits and limitations of using views in a database.
Consider both what views help with and what they cannot do.
You got /4 concepts.