mongodb index example
You cannot create a compound multikey index if more than one to-be-indexed field of a document is an array. For example, consider a collection that contains ... ,The value of the field in the index specification describes the kind of index for that field. For example, a value of 1 specifies an index that orders items in ...
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 mongodb index example 相關參考資料
Single Field Indexes — MongoDB Manual
For example, a value of 1 specifies an index that orders items in ascending order. A value of -1 specifies an index that orders items in descending order. https://docs.mongodb.com Multikey Indexes — MongoDB Manual
You cannot create a compound multikey index if more than one to-be-indexed field of a document is an array. For example, consider a collection that contains ... https://docs.mongodb.com Compound Indexes — MongoDB Manual
The value of the field in the index specification describes the kind of index for that field. For example, a value of 1 specifies an index that orders items in ... https://docs.mongodb.com Use Indexes to Sort Query Results — MongoDB Manual
For example, create an ascending index on the field a for a collection records : ... For example, an index key pattern a: 1, b: 1 } can support a sort on a: 1, b: 1 } ... https://docs.mongodb.com MongoDB Indexing - Tutorialspoint
MongoDB Indexing - Learn MongoDB in simple and easy steps starting from basic to advanced concepts with examples including what is mongoD?, why and ... https://www.tutorialspoint.com Indexes — MongoDB Manual
Create an Index. To create an index in the Mongo Shell, use db.collection.createIndex() . The db.collection.createIndex method only creates an index if an index of the same specification does not alre... https://docs.mongodb.com Create Indexes to Support Your Queries — MongoDB Manual
If you only ever query on a single key in a given collection, then you need to create just one single-key index for that collection. For example, you might create an ... https://docs.mongodb.com db.collection.createIndex() — MongoDB Manual
For example, the collection myColl has a compound index on the numeric fields score and price and the string field category ; the index is created with the ... https://docs.mongodb.com Text Indexes — MongoDB Manual
With a wildcard text index, MongoDB indexes every field that contains string data for each document in the collection. The following example creates a text index ... https://docs.mongodb.com |