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What are the types of views?

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Types of views: (1) Standard view—virtual table, query stored; data fetched at query time. (2) Materialized view—physical storage; pre-computed results; faster reads, needs refresh. (3) Indexed view (SQL Server)—materialized with indexes. (4) Secure view (Snowflake)—hides underlying data from unauthorized users. Use standard views for abstraction; materialized for performance. Trade-off: Materialized views have storage and refresh cost....

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