Aquery filter documentcan use thequery operatorsto specify conditions in the following form: {<field1>:{<operator1>:<value1>},...} 删除的行为表现 索引 Delete operations do not drop indexes, even if deleting all documents from a collection. 原子性 MongoDB中所有的写操作在单一文档层级上是原子...
delete: <collection>, deletes: [ { q : <query>, limit : <integer>, collation: <document>, hint: <document|string> }, ... ], comment: <any>, let: <document>, // Added in MongoDB 5.0 ordered: <boolean>, writeConcern: { <write concern> }, ...
deleteMany() 语法格式 db.collection.deleteMany( <filter>, { writeConcern: <document>, collation: <document> } ) remove() 语法格式 语法一 db.collection.remove( <query>, <justOne> ) 语法二 db.collection.remove( <query>, { justOne: <boolean>, writeConcern: <document>, collation: <document...
官网文档https://www.mongodb.com/docs/manual/tutorial/query-embedded-documents/#match-an-embedded-nested-document 测试数据 db.inventory.insertMany([{item:"journal",qty:25,size:{h:14,w:21,uom:"cm"},status:"A"},{item:"notebook",qty:50,size:{h:8.5,w:11,uom:"in"},status:"A"},{it...
Up to 20 documents displays in the tab. 2 Optional. Specify a filter. To specify filter condition, type in aquery filterdocument in the filter bar. For example, to specify equality condition, use a filter document of the form: { <field1>: <value1>, ... } ...
{ "_id" : { "_data" : "825F156B6B0000000129295A1004C982483732384D28AE57C6500C6018BF46645F696400645F156B640DE1FAAEF1B3DF840004" }, "operationType" : "delete", "clusterTime" : Timestamp(1595239275, 1), "ns" : { "db" : "phoenix", "coll" : "test" }, "documentKey" : { "_...
query:{_id: sequenceName }, update: {$inc:{sequence_value:1}}, "new":true }); return sequenceDocument.;} 2. 使用 Javascript 函数 接下来我们将使用 getNextSequenceValue 函数创建一个新的文档, 并设置文档 _id 自动为返回的序列值: >db.products.insert({ "_id":getNextSequenceValue("product...
To delete a single document, use the deleteOne endpoint. Use the filter property in the request body to specify the search criteria. If more than one document matches the criteria, only the first match will be deleted. Delete Many Documents You can use deleteMany to delete multiple documents...
MongoDB 是文档型数据库,其文档组织结构是 BSON(Binary Serialized Document Format) 是类 JSON 的二进制存储格式,数据组织和访问方式完全和 JSON 一样。支持动态的添加字段、支持内嵌对象和数组对象,同时它也对 JSON 做了一些扩充,如支持 Date 和 BinData 数据类型。正是 BSON 这种字段灵活管理能力赋予了 Mongo ...
[root@mongo01 ~]# mongostat --host mongo03.tyun.cn:27017 --authenticationDatabase admin -u root 5 Enter password: insert query update delete getmore command dirty used flushes vsize res qrw arw net_in net_out conn set repl time *0 *0 *0 *0 0 4|0 0.3% 78.8% 0 5.43G 3.34G 0...