mongoDB入门

mongodb学习

  启动
        ./mongod --dbpath /home/chen1234/mongodb/local/mongodb/bin/data/db --logpath  ./mongod --logpath /home/chen1234/mongodb/local/mongodb/bin/log/mongod.log --fork
   

  增加
       db.person.insert({_id:3,name:'hanmaimei',hobby:['basketball','football'],intro:{title:'my love boy',content:'we are love boy very much'}})



  查询

           #不等于
        db.person.find({_id:{$ne:3},name:'chenguming'})
            
           #in    
        db.person.find({name:{$in:['zhangsan','chenguming']}})

           #既不是也不是 且只显示名字
        db.person.find({$nor:[{name:'chenguming'},{name:'zhangsan'}]},{name:1}) 

           #求模  _id/3==0的数据拿出来

        db.person.find({_id:{$mod:[3,0]}},{name:1})
            
           #正则匹配

        db.person.find({name:{$regex:'\^chen\*'}})