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What are the types of indexes? Types of indexes:
Clustered: It sorts and stores the data row of the table or view in order based on the index key.
Non clustered: it can be defined on a table or view with clustered index or on a heap. Each row contains the key and row locator.
Unique: ensures that the index key is unique
Spatial: These indexes are usually used for spatial objects of geometry
Filtered: It is an optimized non clustered index used for covering queries of well defined data
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