mongodb createindex unique
MongoDB cannot create a unique index on the specified index field(s) if the ... Refer to the createIndex() documentation for additional index creation options. ,createIndex() is a wrapper around the createIndexes command. ... Creates a unique index so that the collection will not accept insertion or update of documents ... , ... for your email field. http://docs.mongodb.org/manual/tutorial/create-a-unique-index/ ... Use unique keyword, or simply make _id value to be email. ... Mongodb ensureIndex has been deprecated, use createIndex instead.,MongoDB creates a unique index on the _id field during the creation of a collection. The _id ... createIndex method only creates an index if an index of the same ... ,MongoDB 索引索引通常能够极大的提高查询的效率，如果没有索引 ... MongoDB使用createIndex() 方法来创建索引。 ... unique, Boolean, 建立的索引是否唯一。 ,function createIndex($key, array $options = []): string ... Creates a unique index. ... refer to the createIndexes command reference in the MongoDB manual. ,createIndex( "email" : 1 }, unique : true } ). The following example first attempts to insert a document containing the target field and a generated Unique ID into ... ,Unique Indexes. A unique index ensures that the indexed fields do not store duplicate values; i.e. enforces uniqueness for the indexed fields. By default, MongoDB creates a unique index on the _id field during the creation of a collection. ,mongoDB可以建立index以利未來的searching，在以後searching時如果 ... 如果在有重覆的值的欄位建立unique index，那麼就要使用drop indexes的功能了。此功能 ... ,MongoDB Manual 3.4 唯一索引. ... createIndex() method with the unique option set to true. ... createIndex( <key and index type specification>, unique: true } ) ...
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 mongodb createindex unique 相關參考資料
Create a Unique Index — MongoDB Manual 3.0.3
MongoDB cannot create a unique index on the specified index field(s) if the ... Refer to the createIndex() documentation for additional index creation options. http://www.dba86.com db.collection.createIndex() — MongoDB Manual
createIndex() is a wrapper around the createIndexes command. ... Creates a unique index so that the collection will not accept insertion or update of documents ... https://docs.mongodb.com How to make user's email unique in mongoDB? - Stack Overflow
... for your email field. http://docs.mongodb.org/manual/tutorial/create-a-unique-index/ ... Use unique keyword, or simply make _id value to be email. ... Mongodb ensureIndex has been deprecated, use... https://stackoverflow.com Indexes — MongoDB Manual
MongoDB creates a unique index on the _id field during the creation of a collection. The _id ... createIndex method only creates an index if an index of the same ... https://docs.mongodb.com MongoDB 索引| 菜鸟教程
MongoDB 索引索引通常能够极大的提高查询的效率，如果没有索引 ... MongoDB使用createIndex() 方法来创建索引。 ... unique, Boolean, 建立的索引是否唯一。 http://www.runoob.com MongoDBCollection::createIndex() — PHP Library Manual 1.2
function createIndex($key, array $options = []): string ... Creates a unique index. ... refer to the createIndexes command reference in the MongoDB manual. https://docs.mongodb.com Unique Constraints on Arbitrary Fields — MongoDB Manual
createIndex( "email" : 1 }, unique : true } ). The following example first attempts to insert a document containing the target field and a generated Unique ID into ... https://docs.mongodb.com Unique Indexes — MongoDB Manual
Unique Indexes. A unique index ensures that the indexed fields do not store duplicate values; i.e. enforces uniqueness for the indexed fields. By default, MongoDB creates a unique index on the _id fie... https://docs.mongodb.com [mongoDB]index功能的筆記@ 雷伊的工作心得:: 隨意窩Xuite日誌
mongoDB可以建立index以利未來的searching，在以後searching時如果 ... 如果在有重覆的值的欄位建立unique index，那麼就要使用drop indexes的功能了。此功能 ... https://blog.xuite.net 唯一索引— MongoDB Manual 3.4 - MongoDB中文社区
MongoDB Manual 3.4 唯一索引. ... createIndex() method with the unique option set to true. ... createIndex( <key and index type specification>, unique: true } ) ... http://www.mongoing.com |