Indexes are used to search your documents, allowing you to specify which document fields to search for and which to return for matching entries. To query a collection using search and/or sort criteria, you must first create an index with the necessary attributes to support your query.
Indexes are similar to SQL indexes in that they accelerate document lookups, but they are also similar to SQL views where you can control the presentation of the results for matching entries. Unlike SQL indexes, Fauna indexes are required to perform most search and sorting operations.
For more information, see Indexes.
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