Views are virtual tables defined by SQL queries that simplify complex data representation. They can remove unnecessary columns, aggregate results, partition data, and secure sensitive information.
Example
CREATE VIEW longlist AS
SELECT name, title FROM authors
JOIN authored ON authors.id = authored.author_id
JOIN books ON books.id = authored.book_id;Advanced Usage
- Temporary Views: Exist only for the duration of the database connection.
- Common Table Expression: Serve as temporary views for a single query.
- Soft Deletion: Use views and triggers to mark records as deleted without physically removing them from the table.
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