MongoDB学习总结

db.createUser( {
    user: "root",
    pwd: "123456",
    roles: [ { role: "root", db: "admin" } ]
  });
  
  db.stus.insert([
    
    
    {
        name: "猪八戒",
        age: 17,
        addr: "高老庄"
    },
    {
        name: "蜘蛛精",
        age: 14,
        addr: "高老庄"
    },
    {
        name: "白骨精",
        age: 12,
        addr: "高老庄"
    },
    {
        name: "孙悟空",
        age: 16,
        addr: "高老庄"
    },
    {
        name: "老沙",
        age: 27,
        addr: "高老庄"
    },
    
])

查询

db.stus.remove({name:"猪八戒"})
db.stus.remove({name:"蜘蛛精"},true) #增加true删除一个
删除集合
db.collection.drop()
删除数据库
db.dropDatabase()

db.stus.update(
    {
        "name": "猪八戒"
    },
    {
        $set: {
            addr: "哈哈哈"
        } #更新指定条件
        $unset: {
            addr: "哈哈哈"
        } #删除制定条件
    },
    {
        multi: true #贪婪修改模式
    }
)

db.createUser.find()