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MongoDB 学习笔记一

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2016-06-07 16:31:15920browse

#查看数据库show dbs;#查看当前数据库db;#查看集合/表 show collections;show tables; #为了兼容mysql习惯#给user集合插入一条JSON数据db.user.insert({name: 'user1', age: 25});#查询数据db.user.find();#删除集合数据db.user.remove();# 把"name"为"user2

#查看数据库
show dbs;
#查看当前数据库
db;
#查看集合/表         
show collections;
show tables; #为了兼容mysql习惯
#给user集合插入一条JSON数据
db.user.insert({name: 'user1', age: 25});
#查询数据
db.user.find();
#删除集合数据
db.user.remove();
# 把"name"为"user2"修改为"user200"
db.user.update({name:'user2'}, {$set: {name:'user200'}});
#把"name"为"user200"的"sex"修改为"male"如果不存在,则增加
db.user.update({name:'user200'}, {$set:{sex:'male'}});
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