MongoDB

Delete Documents, Drop Collection in MongoDB

Delete Documents, Drop Collection in MongoDB

To delete documents in MongoDB, you can use the deleteOne() or deleteMany() methods. These methods allow you to remove one or multiple documents, respectively. Here’s an example of using the deleteOne() method to remove a single document: db.collection.deleteOne({ _id: ObjectId("your_document_id_here") }); Enter fullscreen mode Exit fullscreen mode If you want to delete all documents, you can use the deleteMany() method: db.collection.deleteMany({}); Enter fullscreen mode Exit fullscreen mode Additionally, you can delete all documents that match a specific condition: db.collection.deleteMany({ your_query_here }); Enter fullscreen mode Exit fullscreen mode To delete an entire collection, use the drop() method: db.collection.drop(); Enter fullscreen mode…
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Sử dụng MongoDB hiệu quả trong Nodejs

Sử dụng MongoDB hiệu quả trong Nodejs

MongoDB là một database hướng tài liệu (document), một dạng NoSQL database. Vì thế, MongoDB sẽ tránh cấu trúc table-based của relational database để thích ứng với các tài liệu như JSON có một schema rất linh hoạt gọi là BSON. MongoDB sử dụng lưu trữ dữ liệu dưới dạng Document JSON nên mỗi một collection sẽ các các kích cỡ và các document khác nhau. Các dữ liệu được lưu trữ trong document kiểu JSON nên truy vấn sẽ rất nhanh. 1. Khi nào nên dùng MongoDB? Ví dụ như các hệ thống realtime (thời gian thực) yêu cầu…
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Look out below: AI’s double-edged sword slashes Dell, MongoDB, Salesforce and more – SiliconANGLE

Look out below: AI’s double-edged sword slashes Dell, MongoDB, Salesforce and more – SiliconANGLE

Perhaps it shouldn’t come as a surprise that the artificial intelligence boom was never going to be unalloyed good for every enterprise technology provider looking to leverage AI. But this week, investors got a taste of the downside and they didn’t like it, sending stocks of Dell Technologies, MongoDB, Salesforce, UiPath Nutanix, Workday and more plummeting as it became apparent that spending on generative AI technologies such as ChatGPT is stealing budget from other tech spending, at least on the software side. And for Dell, all those AI servers it sold didn’t produce better profits because, as theCUBE Research Chief…
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