使用多个条件从MongoDB中的集合中删除数据？
您可以remove()为此使用。首先让我们创建一个包含文档的集合-
> db.deleteDataDemo.insertOne({_id:1,"Name":"Larry"});
{ "acknowledged" : true, "insertedId" : 1 }
> db.deleteDataDemo.insertOne({_id:2,"Name":"Chris"});
{ "acknowledged" : true, "insertedId" : 2 }
> db.deleteDataDemo.insertOne({_id:3,"Name":"Robert"});
{ "acknowledged" : true, "insertedId" : 3 }
> db.deleteDataDemo.insertOne({_id:4,"Name":"David"});
{ "acknowledged" : true, "insertedId" : 4 }
> db.deleteDataDemo.insertOne({_id:5,"Name":"Carol"});
{ "acknowledged" : true, "insertedId" : 5 }
> db.deleteDataDemo.insertOne({_id:6,"Name":"Sam"});
{ "acknowledged" : true, "insertedId" : 6 }以下是在find()方法的帮助下显示集合中所有文档的查询-
> db.deleteDataDemo.find().pretty();
这将产生以下输出-
{ "_id" : 1, "Name" : "Larry" }
{ "_id" : 2, "Name" : "Chris" }
{ "_id" : 3, "Name" : "Robert" }
{ "_id" : 4, "Name" : "David" }
{ "_id" : 5, "Name" : "Carol" }
{ "_id" : 6, "Name" : "Sam" }以下是通过使用多个条件从MongoDB中的集合中删除数据的查询。这里我们使用了两个条件，即_id4和NameDavid-
> db.deleteDataDemo.remove({'_id':4,'Name':"David"});
WriteResult({ "nRemoved" : 1 })让我们再次检查所有文件-
> db.deleteDataDemo.find().pretty();
这将产生以下输出-
{ "_id" : 1, "Name" : "Larry" }
{ "_id" : 2, "Name" : "Chris" }
{ "_id" : 3, "Name" : "Robert" }
{ "_id" : 5, "Name" : "Carol" }
{ "_id" : 6, "Name" : "Sam" }