如何在 MongoDB 中删除文档?
mongodbdatabasebig data analytics更新于 2026/2/14 9:07:17
要删除文档，请使用 remove()。让我们创建一个包含文档的集合 −
> db.demo79.insertOne({"Name":"Chris"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2bdb2271bf0181ecc42293")
}
> db.demo79.insertOne({"Name":"David"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2bdb2671bf0181ecc42294")
}
> db.demo79.insertOne({"Name":"Bob"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2bdb2971bf0181ecc42295")
}
> db.demo79.insertOne({"Name":"Mike"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2bdb2c71bf0181ecc42296")
}
借助 find() 方法显示集合中的所有文档 −
> db.demo79.find();
这将产生以下输出 −
{ "_id" : ObjectId("5e2bdb2271bf0181ecc42293"), "Name" : "Chris" }
{ "_id" : ObjectId("5e2bdb2671bf0181ecc42294"), "Name" : "David" }
{ "_id" : ObjectId("5e2bdb2971bf0181ecc42295"), "Name" : "Bob" }
{ "_id" : ObjectId("5e2bdb2c71bf0181ecc42296"), "Name" : "Mike" }
以下是在 MongoDB 中删除文档的查询 −
> db.demo79.remove({"Name":"Bob"});
WriteResult({ "nRemoved" : 1 })
借助 find() 方法显示集合中的所有文档 −
> db.demo79.find();
This will produce the following output. We deleted a document successfully −
{ "_id" : ObjectId("5e2bdb2271bf0181ecc42293"), "Name" : "Chris" }
{ "_id" : ObjectId("5e2bdb2671bf0181ecc42294"), "Name" : "David" }
{ "_id" : ObjectId("5e2bdb2c71bf0181ecc42296"), "Name" : "Mike" }
