本文主要給大家介紹了MongoDB數(shù)據(jù)查詢的相關(guān)內(nèi)容，對(duì)大家具有一定的參考價(jià)值，需要的朋友們一起來(lái)學(xué)習(xí)學(xué)習(xí)吧。

導(dǎo)入測(cè)試數(shù)據(jù)

在開始之前我們應(yīng)該先準(zhǔn)備數(shù)據(jù)方便演示，這里我插入的了幾條數(shù)據(jù)，數(shù)據(jù)如下：

db.user.insertMany(
[{
name:’jack’,
age:22,
sex:’Man’,
tags:[‘python’,’c++’,’c’],
grades:[22,33,44,55],
school:{
name:’shida’,
city:’xuzhou’
}
},{
name:’jhon’,
age:33,
sex:null,
tags:[‘python’,’java’],
grades:[66,22,44,88],
school:{
name:’kuangda’,
city:’xuzhou’
}
},
{
name:’xiaoming’,
age:33,
tags:[‘python’,’java’],
grades:[66,22,44,88],
school:{
name:’kuangda’,
city:’xuzhou’
}
}
]
)