Introduction to the installation and basic operation of Mongodb in Node
1. Install mongodb
brew install mongodb
2. Database configuration
1)vim ~/.bash_profile 2)立刻生效 source .bash_profile # mongod db export PATH=/usr/local/Cellar/mongodb/3.4.9/bin:${PATH}
3. Open mongoldb
1) sudo mongod // 开启服务 2) mongo // 链接mongodb
4. Basic database operations
1) sho abs; // 显示数据库 2)use userinfo //如果有则切换到userinfo数据库,如果没有就创建userinfo 3) db //返回userinfo,表示当前userinfo处于准备状态 4) db.users.insert({username:'admin',password:'123'}) //向userinfo中的users集合插入一条数据。如果有合集users则向该集合插入数据,如果没有,则先创建users集合,再插入数据 5)db.users.find().pretty() //显示users集合中的数据,pretty()是格式化 6)db.users.remove({name:'xxx'}) //删除name为'xxx'的记录 7)db.users.remove({}) //删除users集合中的所有数据 8)db.users.drop() //删除users集合 9)db.users.findOne({name:'xxx'}) //查询name为'xxx'的记录,只返回遇到的第一条记录 10)db.users.find() //返回所有name为'xxx'的记录
5. Close the database:
Execute the following command on the command line
use admin; db.shutdownServer();
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