Home Database Mysql Tutorial mongodb 更改数据类型

mongodb 更改数据类型

Jun 07, 2016 pm 04:32 PM
mongodb data Change type

db.bmdMessage.find( { '_id' : { $type : 2 } } ).forEach( function (x) { x._id=ObjectId(x._id); db.bmdMessage.save(x); }); 注意:_id的类型创建了则不允许更改。 参考: 修改MongoDB 字段的类型 官方文档 原文地址:mongodb 更改数据类型, 感谢原作者

db.bmdMessage.find( { '_id' : { $type : 2 } } ).forEach( function (x) { x._id=ObjectId(x._id); db.bmdMessage.save(x); });

注意:_id的类型创建了则不允许更改。
参考:
修改MongoDB 字段的类型
官方文档

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

AI startups collectively switched jobs to OpenAI, and the security team regrouped after Ilya left! AI startups collectively switched jobs to OpenAI, and the security team regrouped after Ilya left! Jun 08, 2024 pm 01:00 PM

Last week, amid the internal wave of resignations and external criticism, OpenAI was plagued by internal and external troubles: - The infringement of the widow sister sparked global heated discussions - Employees signing "overlord clauses" were exposed one after another - Netizens listed Ultraman's "seven deadly sins" Rumors refuting: According to leaked information and documents obtained by Vox, OpenAI’s senior leadership, including Altman, was well aware of these equity recovery provisions and signed off on them. In addition, there is a serious and urgent issue facing OpenAI - AI safety. The recent departures of five security-related employees, including two of its most prominent employees, and the dissolution of the "Super Alignment" team have once again put OpenAI's security issues in the spotlight. Fortune magazine reported that OpenA

70B model generates 1,000 tokens in seconds, code rewriting surpasses GPT-4o, from the Cursor team, a code artifact invested by OpenAI 70B model generates 1,000 tokens in seconds, code rewriting surpasses GPT-4o, from the Cursor team, a code artifact invested by OpenAI Jun 13, 2024 pm 03:47 PM

70B model, 1000 tokens can be generated in seconds, which translates into nearly 4000 characters! The researchers fine-tuned Llama3 and introduced an acceleration algorithm. Compared with the native version, the speed is 13 times faster! Not only is it fast, its performance on code rewriting tasks even surpasses GPT-4o. This achievement comes from anysphere, the team behind the popular AI programming artifact Cursor, and OpenAI also participated in the investment. You must know that on Groq, a well-known fast inference acceleration framework, the inference speed of 70BLlama3 is only more than 300 tokens per second. With the speed of Cursor, it can be said that it achieves near-instant complete code file editing. Some people call it a good guy, if you put Curs

China Mobile: Humanity is entering the fourth industrial revolution and officially announced 'three plans” China Mobile: Humanity is entering the fourth industrial revolution and officially announced 'three plans” Jun 27, 2024 am 10:29 AM

According to news on June 26, at the opening ceremony of the 2024 World Mobile Communications Conference Shanghai (MWC Shanghai), China Mobile Chairman Yang Jie delivered a speech. He said that currently, human society is entering the fourth industrial revolution, which is dominated by information and deeply integrated with information and energy, that is, the "digital intelligence revolution", and the formation of new productive forces is accelerating. Yang Jie believes that from the "mechanization revolution" driven by steam engines, to the "electrification revolution" driven by electricity, internal combustion engines, etc., to the "information revolution" driven by computers and the Internet, each round of industrial revolution is based on "information and "Energy" is the main line, bringing productivity development

An American professor used his 2-year-old daughter to train an AI model to appear in Science! Human cubs use head-mounted cameras to train new AI An American professor used his 2-year-old daughter to train an AI model to appear in Science! Human cubs use head-mounted cameras to train new AI Jun 03, 2024 am 10:08 AM

Unbelievably, in order to train an AI model, a professor from the State University of New York strapped a GoPro-like camera to his daughter’s head! Although it sounds incredible, this professor's behavior is actually well-founded. To train the complex neural network behind LLM, massive data is required. Is our current LLM training process necessarily the simplest and most efficient way? Certainly not! Scientists have discovered that in human toddlers, the brain absorbs water like a sponge, quickly forming a coherent worldview. Although LLM performs amazingly at times, over time, human children become smarter and more creative than the model! The secret of children mastering language. How to train LLM in a better way? When scientists are puzzled by the solution,

The inside story of Google's search algorithm was revealed, and 2,500 pages of documents were leaked with real names! Search Ranking Lies Exposed The inside story of Google's search algorithm was revealed, and 2,500 pages of documents were leaked with real names! Search Ranking Lies Exposed Jun 11, 2024 am 09:14 AM

Recently, 2,500 pages of internal Google documents were leaked, revealing how search, "the Internet's most powerful arbiter," operates. SparkToro's co-founder and CEO is an anonymous person. He published a blog post on his personal website, claiming that "an anonymous person shared with me thousands of pages of leaked Google Search API documentation that everyone in SEO should read." Go to them! "For many years, RandFishkin has been the top spokesperson in the field of SEO (Search Engine Optimization, search engine optimization), and he proposed the concept of "website authority" (DomainRating). Since he is highly respected in this field, RandFishkin

How to configure MongoDB automatic expansion on Debian How to configure MongoDB automatic expansion on Debian Apr 02, 2025 am 07:36 AM

This article introduces how to configure MongoDB on Debian system to achieve automatic expansion. The main steps include setting up the MongoDB replica set and disk space monitoring. 1. MongoDB installation First, make sure that MongoDB is installed on the Debian system. Install using the following command: sudoaptupdatesudoaptinstall-ymongodb-org 2. Configuring MongoDB replica set MongoDB replica set ensures high availability and data redundancy, which is the basis for achieving automatic capacity expansion. Start MongoDB service: sudosystemctlstartmongodsudosys

How to ensure high availability of MongoDB on Debian How to ensure high availability of MongoDB on Debian Apr 02, 2025 am 07:21 AM

This article describes how to build a highly available MongoDB database on a Debian system. We will explore multiple ways to ensure data security and services continue to operate. Key strategy: ReplicaSet: ReplicaSet: Use replicasets to achieve data redundancy and automatic failover. When a master node fails, the replica set will automatically elect a new master node to ensure the continuous availability of the service. Data backup and recovery: Regularly use the mongodump command to backup the database and formulate effective recovery strategies to deal with the risk of data loss. Monitoring and Alarms: Deploy monitoring tools (such as Prometheus, Grafana) to monitor the running status of MongoDB in real time, and

Navicat's method to view MongoDB database password Navicat's method to view MongoDB database password Apr 08, 2025 pm 09:39 PM

It is impossible to view MongoDB password directly through Navicat because it is stored as hash values. How to retrieve lost passwords: 1. Reset passwords; 2. Check configuration files (may contain hash values); 3. Check codes (may hardcode passwords).

See all articles