Category:Database

  • Mybatis – plus 3.0 – RELEASE profile

    Time:2019-10-23

    Mybatis-Plus is a Mybatis dynamic SQL automatic injection of Mybatis CRUD operation middleware, reduce your development cycle optimization dynamic maintenance of XML entity fields, no intrusion omni-directional ORM auxiliary layer so that you have more time to spend with your family. Code name: super lollipop, one word sweet, two words very sweet, three words super […]

  • Mo tianlun document open test, three good gifts you take

    Time:2019-10-23

    Event detailsMok documents are organized by technical experts and uploaded to the database related solutions. Currently support PDF, PPT, WORD, TXT format files, users can browse all documents online free, but also through the ink value to download to the local. Now open beta, invite you to become a technical expert and upload documents, three […]

  • An interesting trigger implementation based on sql-on-hbase products

    Time:2019-10-23

    background Now there are many SQ on HBase products: Trafodion, Impala, Greplum and so on, but few have support the trigger function of products, perhaps because under this application scenario is rarely used to trigger, but there is no denying that the trigger is a very useful function, this article focuses on some lack of […]

  • 12 gestures that enterprises use databases

    Time:2019-10-23

    Database, as the basic software of IT system, plays a very great role. So what are some of the ways in which an enterprise can choose to use a database? What are the characteristics of different ways? This paper will analyze twelve situations (the first six are local and the last six are cloud-based) from […]

  • When fintech meets cloud native, how does ant financial do security architecture?

    Time:2019-10-23

    Ant financial has spent the past 15 years reshaping payments that have transformed lives, serving more than 1.2 billion people worldwide, and all this has been underpinned by technology. At the 2019 hangzhou yunqi conference, ant financial will share its 15 years of technological precipitation and future-oriented financial technology innovation with participants. We have compiled […]

  • Install and configure Redis under Ubuntu16.04

    Time:2019-10-23

    Statement: the content of this article is reproduced to [Ubuntu16.04 installation and configuration of Redis] I. preconditions You need to connect to the Internet and then execute the sudo apt-get update package Execute the installation command sudo apt-get install redis-server After execution, as shown below, we enter y to confirm the installation and use the […]

  • Mongoose error: getaddrinfo ENOTFOUND localhost localhost:27017

    Time:2019-10-23

    { Error: getaddrinfo ENOTFOUND localhost localhost:27017 at errnoException (dns.js:50:10) at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:92:26) code: ‘ENOTFOUND’, errno: ‘ENOTFOUND’, syscall: ‘getaddrinfo’, hostname: ‘localhost’, host: ‘localhost’, port: 27017 } mongoose.connect(‘mongodb://localhost:27017/db1’,{ poolSize:5, useNewUrlParser: true },err=>{ if(err){ console.error(err) }else { Console.log (‘mongodb successfully connected ‘) } }) Try changing localhost to 127.0.0.1 mongoose.connect(‘mongodb://127.0.0.1:27017/db1’,{ poolSize:5, useNewUrlParser: true },err=>{ if(err){ console.error(err) […]

  • 10 lines of Python code, batch compression of 500 pictures, is too powerful

    Time:2019-10-23

    This article is original and first published on the public account [Python is a cat, without authorization, do not reprint.The original address: https://mp.weixin.qq.com/s/5hpFDgjCpfb0O1Jg-ycACw Readers familiar with “Python cat” should know that all of my posts use highly distinctive illustrations — cat for the original article and dog for the reproduced article, with rare exceptions. These […]

  • Improve performance, build MySQL read-write separation environment (1)

    Time:2019-10-21

    This is a scattered note before brother song. I’ll sort it out and share it with you! MySQL read-write separation is a very common requirement in Internet projects. Trapped in Linux and MySQL version problems, many people often fail to build. Today, brother song will give you a successful example. Later, I will share with […]

  • Mongodb installation and operation

    Time:2019-10-21

    I. database installation under win Enter the Mongo official website and select the corresponding MSI version to download. During installation, the mongod service installation and some database configurations are checked by default. For example, the existing database connection tool Robo 3T can cancel the compass installation checked by default. If the startup service reports MP […]

  • Three popular databases of NoSQL, memcached, redis and mongodb

    Time:2019-10-21

    Preface NoSQL, generally refers to non relational database. With the continuous development of the Internet, the traditional relational database has been unable to cope with the new Internet model websites, especially the super large-scale and high concurrent SNS type pure dynamic websites, which has exposed many problems that are difficult to overcome, while the non […]

  • Dbask Q & a session 6

    Time:2019-10-21

    Introduction Recently, we have newly connected DB preparation room in dbask applet and added more than 60 technical experts. We look forward to more experts in database field and authors of public account joining motianlun to create an open, mutual and professional database technology community. Quiz collection Next, we will share the problems and diagnosis […]