mongodb 数据操作(1)

切换/创建数据库

use test    

添加数据
db.student.save({name:"J33ack",age:25})

查看数据库
show dbs

删除当前数据库

db.dropDatabase()

创建集合

db.createCollection("student")

查看集合
show collections

删除几个

db.student.drop()

重命名集合
db.student.renameCollection("stu")

查看集合记录数量

db.student.count()

查看数据空间容量
db.student.dataSize()

添加记录

db.student.save([
{name:"李强1",sex:"男",birthday:"2019-10-22",class:"5-1",city:"北京"},
{name:"李强2",sex:"男",birthday:"2019-10-22",class:"5-1",city:"北京"},
{name:"李强3",sex:"男",birthday:"2019-10-22",class:"5-1",city:"北京"},
{name:"李强4",sex:"男",birthday:"2019-10-22",class:"5-1",city:"北京"},
{name:"李强5",sex:"男",birthday:"2019-10-22",class:"5-1",city:"北京"}
])