如何在Mongo中描述收藏? [英] How do I describe a collection in Mongo?

问题描述

所以这是学习Mongo Db的第3天.我来自MySql宇宙...

So this is Day 3 of learning Mongo Db. I'm coming from the MySql universe...

很多时候，当我需要为我不熟悉的MySql表编写查询时，我会使用"desc"命令-基本上告诉我应该在查询中包括哪些字段.

A lot of times when I need to write a query for a MySql table I'm unfamiliar with, I would use the "desc" command - basically telling me what fields I should include in my query.

对于Mongo数据库，我该怎么做?我知道，我知道...我正在无模式数据库中搜索模式. =)但是用户还会如何知道在查询中使用哪些字段?

How would I do that for a Mongo db? I know, I know...I'm searching for a schema in a schema-less database. =) But how else would users know what fields to use in their queries?

我走错路了吗?显然，我正在尝试使用MySql在Mongo数据库中做事. Mongo的方式是什么?

Am I going at this the wrong way? Obviously I'm trying to use a MySql way of doing things in a Mongo db. What's the Mongo way?

推荐答案

在编辑器/mongoshell中键入以下查询

Type the below query in editor / mongoshell

var col_list= db.emp.findOne();
for (var col in col_list) { print (col) ; }

输出将为您提供集合中的列名称:

output will give you name of columns in collection :

_id
name
salary

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