Tag：data
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Time：2020-9-23
Overview of the article Understanding computer network and its classification What is a computer network The computer network is mainly made up of some common and programmable hardwareThrough these hardware, different types of data can be transmitted and a wide range of applications can be supported Computer network is not only the concept of software, […]
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Time：2020-9-23
Clickhouse performance test In order to verify the performance of Clickhouse, we will conduct multi-dimensional test on the Clickhouse based on the actual business scenarios. Build test data In the actual business, the most common business scenario includes two tables, the main order table and the order details tableUsually two tables willjoinInquiry, orgroup byQuery, the […]
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Time：2020-9-23
Abstract:INFOCAMERE is an IT company affiliated to the Italian Chamber of Commerce. It mainly designs and develops the latest and innovative IT solutions and services. It connects the chamber of Commerce and its database through a network accessible to the public. With INFOCAMERE, Italian and foreign enterprises, public institutions, trade associations, professional groups and simple […]
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Time：2020-9-23
This article mainly describes how to import data from neo4j toNebula GraphDatabase。 Before we talk about how to operate data import, let’s first understand how the nebula graph implements this import function. Data processing principle of nebula graph exchange The name of our import tool is Nebula graphExchangeSpark is used as the import platform to […]
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Time：2020-9-23
An overview of the article Understanding computer network and its classification What is computer network The computer network is mainly made up of some common and programmable hardwareThrough these hardware, different types of data can be transmitted and a wide range of applications can be supported Computer network is not only the concept of software, […]
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Time：2020-9-23
The execution of the program and the encryption and decryption process are unique. No matter the internal developers or external hackers attack, even if they get the data and private key and the root authority of the server, they can’t decrypt and restore the data. Swoole divides encryption and decryption into three parts (program […]
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Time：2020-9-23
preface In the Web1.0 era, there is no concept of the front end. If you want to write, you should write it together with the back end. Before and after the code is mixed together, such as PHP development front and back end, and then derived MVC development model and framework. Web1.0 Era The original […]
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Time：2020-9-23
Navicat Data Modeler 3Is a powerful database analysis and design management software, the software volume is small, but the function is very powerful, has the inborn superiority in the data storage aspect, can help everybody to improve the efficiency, the redesign function and the interface, brings a kind of brand-new experience for the creation of […]
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Time：2020-9-23
Abstract: This article will introduce the difference between ngql and SQL, the query language of nebula graph. This article was first published on the official blog of nebula graph: https://nebula-graph.com.cn/p… Although this article mainly introduces the differences between ngql and SQL, we will not discuss the two languages in depth, but compare the two languages […]
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Time：2020-9-23
1. What storage engines does MySQL have? Please list the differences in detail? InnoDB: transactional storage engine with high concurrent read frequency Memory: storage engine, stored in memory, small amount of data, fast speed Merge: Archive: archive, with good compression mechanism 2. How to design the database layer of high concurrency system? What are the […]
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Time：2020-9-22
Today, in the secondary development, we encounter the Vue life cycle again. I didn’t know what I knew before. I read an article today and I feel that it’s written well. Record here: https://segmentfault.com/a/1190000011381906 Here is a rough summary of myself 1. Beforecreate: at this point, there is no assignment, just initialization. 2. […]
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Time：2020-9-22
In gwa2java, the HTML form of file upload is called “mixed loading of passenger and freight” HTTP request processing. File upload processing is a special application in HTTP web development, which has certain requirements for developers. Whether PHP or JSP is popular, it needs to be handled. Since I really can’t remember how to handle […]
