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This article shows you what the MongoDB query code is like, the content is concise and easy to understand, it can definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Prepare data

Db.post.insert ([{title: 'MongoDB Overview', desc:' My first post', author: 'zhangsan', url:' http://www.zhangsan.com', tags: ['mongodb',' database', 'NoSQL'], likes: 10}, {title:' NoSQL Database', desc:'My first post', author: 'zhangsan', url:' http://www.zhangsan.com', tags: ['mongodb' 'database',' NoSQL'], likes: 2, comments: [{user:'wangwu', message:'My first comment', dateCreated: new Date (2020 like: 1}]})

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Db.post.find () .pretty ()

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Db.post.find ({"author": "zhangsan", "title": "MongoDB Overview") {"_ id": ObjectId ("5f1848c4b4a5c402168ec83c"), "title": "MongoDB Overview", "desc": "My first post", "author": "zhangsan", "url": "http://www.zhangsan.com"," tags ": [" mongodb "," database "," NoSQL "] "likes": 10} the above is what the MongoDB query code looks like Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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