The following example/operation usesinsertMany()to insert documents that include the_idfield. The value of_idmust be unique within the collection to avoid a duplicate key error. try{ db.products.insertMany([ {_id:10,item:"large box",qty:20}, ...
MongoDB gives you the flexibility to normalize or duplicate your data to optimize your application. If you duplicate data in your schema, you must decide how to keep duplicated data consistent across multiple collections. Some applications require duplicated data to be made consistent immediately, whe...
このSplunk Observability Cloud インテグレーションを MongoDB Atlas モニターに使用します。メリット、インストール、設定、メトリクスを参照してください
The collections to be migrated must have PRIMARY KEY or UNIQUE constraints and all fields must be unique. Otherwise, the destination database may contain duplicate data records. If you select collections as the objects to be migrated and you need to edit col...
集合就是 MongoDB 文档组,类似于 RDBMS (关系数据库管理系统:Relational Database Management System)中的表的概念。 集合存在于数据库中,一个库中可以创建多个集合。每个集合没有固定的结构,这意味着你在对集合可以插入不同格式和类型的数据,但通常情况下我们插入集合的数据都会有一定的关联性。 4.3 文档 文档集合...
// 创建全文索引：字段：content， 键的类型：text(全文索引类型)> db.blog.ensureIndex({"content": "text"})> db.blog.insert({ "title": "MongoDB: The Definitive Guide", "summary": "MongoDB Atlas Database as a Service", "content": "The best way to deploy, operate, and scale ...
The collections to be migrated must have PRIMARY KEY or UNIQUE constraints and all fields must be unique. Otherwise, the destination database may contain duplicate data records. If you select collections as the objects to be migrated and you need to edit collections...
Alongside removing indexes that are not used efficiently, look out for duplicate indexes that you don’t need to run as well. We use some scripts to check if there are duplicate indexes or if there are any indexes that are not being used. You can check and use them from our repository:...
"errmsg" : "E11000 duplicate key error collection: test.foo index: username_1 dup key: { : \"mengday\" }" } }) // 第一次 插入不包含索引键的文档,插入成功,不包含索引键系统会默认为索引键的值为null > db.foo.insert({"email": "mengday3@"}) ...
Replace<your-kafka-bootstrap-server>with the address of the Kafka cluster bootstrap server. If the connector restarts for any reason, you may see duplicate records in the topic. If you have carefully followed the steps mentioned above, you should have a MongoDB CDC setup using Atlas and Conf...