mongodb create index example
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 ... ,createIndexes, string, The collection for which to create indexes. indexes, array ... For examples of wildcard index creation, see Create a Wildcard Index.
相關軟體 MongoDB 資訊 | |
---|---|
MongoDB 是一個免費且開放源碼的跨平檯面向文檔的數據庫程序。分類為 NoSQL 數據庫程序,MongoDB 使用類似 JSON 的文檔與模式。它為使用 MongoDB 包括數據庫開發人員和 DBA 的任何人提供了豐富的 GUI 工具。主要功能包括:全功能嵌入 MongoDB Shell,用戶友好的 Map-Reduce 操作編輯器,創建 / 刪除數據庫,管理集合及其索引的能力,用戶友好的 G... MongoDB 軟體介紹
mongodb create index example 相關參考資料
Compound Indexes — MongoDB Manual
Create a Compound Index; Sort Order; Prefixes; Index Intersection; Additional ... The following diagram illustrates an example of a compound index on two fields:. 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 createIndexes — MongoDB Manual
createIndexes, string, The collection for which to create indexes. indexes, array ... For examples of wildcard index creation, see Create a Wildcard Index. https://docs.mongodb.com db.collection.createIndex() - MongoDB shell method ...
createIndex(): The db.collection.createIndex() method is used to builds an index on a collection. See also syntax, parameters, examples and ... https://www.w3resource.com db.collection.createIndex() — MongoDB Manual
Create an Index on a Multiple Fields The following example creates a compound index on the orderDate field (in ascending order) and the zipcode field (in descending order.) A compound index cannot inc... https://docs.mongodb.com db.collection.createIndexes() — MongoDB Manual
For example, you cannot specify a compound index key. ... createIndexes() will return an error if you attempt to create indexes with incompatible options. Refer to ... https://docs.mongodb.com Indexes — MongoDB Manual
To create an index in the Mongo Shell, use db.collection.createIndex() . ... The following example creates a single key descending index on the name field: copy. https://docs.mongodb.com MongoDB Indexing Tutorial - createIndex(), dropindex ...
Indexes are very important in any database, and with MongoDB it's no different. Use of createIndex(), getindexes() dropindex() is explained in ... https://www.guru99.com MongoDB 索引| 菜鸟教程
索引是特殊的数据结构,索引存储在一个易于遍历读取的数据集合中,索引是对数据库表中一列或多列的值进行排序的一种结构createIndex() 方法MongoDB.. http://www.runoob.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 |