markdown Mongo常用语句

Posted 2021-05-05

# Mongo 常用语句
* 跨表联合查询
```bash
rs.slaveOk()
var cid = db.calls.find({pid:10,_id:{$gte:ObjectId("5c16f18db01391a7585e8684")}}).limit(1000).projection({_id:1}).toArray()
var array = new Array()
for(i=0;i<cid.length;i++){
    array.push(cid[i]["_id"])
}
db.call_voice.find({_id:{$in:array}})
```