Tag：data base
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Time：2020-12-24
–Create database database namecreate database Unit2_1712A –Use database [open database]–Use database nameuse Unit2_1712A –Delete database–Drop database namedrop database Unit2_1712A –Backup database–Backup database name to disk =’path of file storage ‘backup database Unit2_1712A to disk=’F:\\beifen\bk.bak’ –Restore database–Restore database database database name from disk =’File storage path ‘restore database Unit2_1712A from disk=’F:\\beifen\bk.bak’ […]
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Time：2020-5-27
1、 The concept of session Cookie is to save the key value pair data on the browser side, while session is to save the key value pair data on the server side Session use depends on cookies: after session is used, a session ID data will be stored in the cookie, and the browser will […]
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Time：2020-5-27
Simulate user registration and login:The MySQL database has been installed, and the database information is in the config.py The database plug-in needs to be installed in the corresponding project. On first execution, on the web- test.py Open in db.create_ All () will automatically create the corresponding table in the database, and then comment out db.create_ […]
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Time：2020-5-27
Ten years ago (2009) in September, I was ordered to set up the Taobao technical support department at that time. Then I started the technical budget work in 2010. When I first reported the budget to Dr. Wang Jian, then the group’s chief architect, I proudly said: “in 2010, Taobao will no longer buy minicomputers”, […]
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Time：2020-5-27
background In order to improve the efficiency of IT project management, Improve the monitoring and management level of demand and development quality system get ready Server linux Operating environment – JDK1.8 Database – MySQL 5.6 Installation package – atlas-jira-software-8.5.4-x64.bin Registration software – Atlas agent MySQL connection driver – mysql-connector-java-5.1.47 tar.gz plan JIRA exclusive user, useradd […]
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Time：2020-5-27
Starting a business is the best way to invest in yourself Science and technology maker: as a famous art youth in the technology circle, which moment will make you happier and complete a beautiful code or music score? Or get cheers and applause from the outside world? Huang Dongxu: in a long period of time […]
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Time：2020-5-27
1. Introduction The task of read-write separation is to choose which database to execute for a SQL. As for who will choose which database, there are only two things. One is the middleware, the other is the program itself. Therefore, generally speaking, there are two ways to realize read-write separation. The first is to rely […]
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Time：2020-5-27
In this paper, the method of JSP uploading excel and inserting excel into database is introduced. Share with you for your reference. The details are as follows: This import excel is bound with POJO, (disadvantage) the excle header must be the field value of POJO 1. HTML page: <form method=”post” enctype=”multipart/form-data”> <table> <tr> <td></td> <td> […]
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Time：2020-5-27
1. About mybatis Learning video: https://www.bilibili.com/vide… Persistence: the process of transforming program data into persistent and transient state Persistence layer: the code block that completes the persistence work, collectively referred to as Dao layer Mybatis: a semi persistent framework to simplify database connection and operation. It is the current mainstream Official website: https://mybatis.org/mybatis-3… 2. The […]
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Time：2020-5-26
Four types of NoSQL The position of NoSQL database in the whole database field is self-evident. In the era of big data, although RDBMS is excellent, RDBMS is gradually unable to cope with many database processing tasks in the face of rapidly growing data scale and increasingly complex data models. At this time, NoSQL has […]
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Time：2020-5-26
preface In a distributed system, when cache and database exist at the same time, if there are write operations, do you want to operate the database first or cache first? Think about the possible problems before you look down. I’ll explain it in several ways. Cache maintenance scheme I Suppose there is a write (thread […]
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Time：2020-5-26
Introduction to Das DAS is a database access middleware developed by Xinye technology. It is an integrated relational database access solution that integrates database management, ORM, dynamic SQL construction and sub database and sub table support. See here, you will say young! There are so many ORM frameworks and sub database and sub table components, […]
