标签:数据 info code stack mit reg color img 需要
P版云环境
自助mongo 数据库集群
sip_host01:PRIMARY> show dbs admin 0.000GB bk-cmdb-adapter 0.031GB config 0.000GB host-evacuation-service 0.000GB local 0.046GB onlinesnapshot-service 0.000GB order-business 0.000GB tstack_cmdb_prod 0.002GB
sip_host01:PRIMARY> use tstack_cmdb_prod switched to db tstack_cmdb_prod sip_host01:PRIMARY>
查询 t_inst__Server 这个col(表)中的数据;pretty() 格式化输出
sip_host01:PRIMARY> db.t_inst__Server.find().pretty() (以下ip已经更改)
{ "_id" : ObjectId("5caf296d7b16cee38a9ba0c5"), "svrCategory" : "VirtualParent", "allIp" : [ "0.0.0.0" ], "hostName" : "openstack-com09", "cloudStatus" : "入云成功", "creator" : "admin", "ip" : "0.0.0.0", "flavorId" : { "disk" : "2048", "instanceId" : "d2c1566a-6477-45b4-a0c8-9b7f58e5f331", "name" : "TENCENTRegion_PM-01", "cpu" : "48", "ram" : "131072" }, "dept" : { "number" : "admin", "deptName" : "默认部门", "instanceId" : "43979", "deptId" : "43979", "name" : "默认部门-43979" }, "osId" : { "instanceId" : "ab091c65-0a78-4445-9fe1-bbcd2df39953", "osVersion" : "3.10.0", "name" : "CentOS7.2_3.10.0_3.10.0", "osName" : "CentOS7.2" }, "serverId" : "074EE5D1-FEBE-5BA6-B5A3-8436D7B84E83", "version" : "1", "operator" : [ "admin" ], "bakOperator" : [ "admin" ], "idcPosId" : { "instanceId" : "32f61ddf-29d7-5469-a434-b200b6524b97", "name" : "滨海BRD0601_A01_17", "posCode" : 17 }, "instanceId" : "37036798-6539-5643-b68a-e86861454d6b", "regionId" : { "number" : "hs_Experience", "instanceId" : "74acf61f-c369-4a6a-a5ac-38e233f31483", "name" : "hs_Experience" }, "regionHostId" : "hs_Experience_17", "assetId" : "tstack-asset11", "hostType" : "物理机", "posUnit" : NumberLong(1), "name" : "openstack-com09", "ctime" : ISODate("2019-04-11T11:47:57.693Z"), "status" : "运营中", "businessModuleId" : null, "cloudTime" : null, "hypervisor" : null, "imageId" : null, "networkId" : [ "" ], "subnetId" : [ "" ] }
$type操作符是基于BSON类型来检索集合中匹配的数据类型,并返回结果。
MongoDB 中可以使用的类型如下表所示:
如果想获取 "t_inst__Server" 集合中 title 为 String 的数据,你可以使用以下命令:
db.t_inst__Server.find({"title" : {$type : 2}})
或
db.t_inst__Server.find({"title" : {$type : ‘string‘}})、
输出结果:
如果你需要在MongoDB中读取指定数量的数据记录,可以使用MongoDB的Limit方法,limit()方法接受一个数字参数,该参数指定从MongoDB中读取的记录条数。
limit()方法基本语法如下所示:
>db.COLLECTION_NAME.find().limit(NUMBER)
以下实例为显示查询文档中的两条记录:
标签:数据 info code stack mit reg color img 需要
原文地址:https://www.cnblogs.com/lsw-blogs/p/10949956.html