Tag：data base
-
Time：2020-1-21
“Go to o” is a hot topic in recent years, which also brings about various doubts, including existing database evaluation, technology selection, etc. Going to o is a systematic project, which needs to be fully evaluated. In this paper, through self-developed tools, generate database portraits, provide first-hand data for o-assessment, and hope to give you […]
-
Time：2020-1-21
order This article focuses on the cache aside mode of the lower cache. Cache Aside There are two main points: The application program fetches the data from the cache first. If it doesn’t get the data, it fetches the data from the database. After success, it puts it into the cache. Update is to update […]
-
Time：2020-1-21
Alimei’s Guide:Architect is a team leader who can not only control the whole but also understand the local bottlenecks and provide solutions according to specific business scenarios. Behind the seemingly perfect “personality model”, it is a hard exploration. Today, nine Mo, a technical expert from Alibaba, systematically summarizes many years of experience to help more […]
-
Time：2020-1-21
601. The flow of people in the gymnasium A new gymnasium has been built in city x, and the daily traffic information is recorded in these three columns:Serial number (id)、date (date)、 Visitors flowrate (people)。 Please write a query statement to find the peak period, which requires three consecutive days or more, and the daily traffic […]
-
Time：2020-1-21
TiDB Markdown Plugin Repo: https://github.com/imiskolee/tidb-wasm-markdownA plug-in that enables tidb to run in markdown. background On Wednesday, I saw that the circle of friends was frantically brushing tidb – wasm, an interesting thing? Tidb + webassembly).This is indeed an exciting work result, which provides a good idea for the application of wasm. The project itself is […]
-
Time：2020-1-21
Database 2 > > > MySQL storage engine introduction MySQL basic data type Integrity constraints of MySQL tables A preliminary understanding of MySQL database Mysql database table detailed operation The execution order of MySQL’s logical query statements MySQL single mark query MySQL multi table query MySQL exercises and answers
-
Time：2020-1-21
Microsoft in2019year9month24The day was released.dotNet Core 3.0andC# 8.0, many newFeatures, please click me for details. undoubtedlydotNet Core 3.0And a month laterdotNet Core 3.1aboutdotNetIs an important milestone. aboutMySQLNow, more and more commercial companies useMySQLAs your main database, thoughMySQLIt’s coming8.0With more perfect data capability and better performance, there are still many companies using it in new projectsMySQL5.7。 […]
-
Time：2020-1-19
Introduction After more than 20 years of extensive and rapid development, China’s shoemaking industry has experienced a high-speed development stage. At present, the export-oriented shoemaking industry, facing the shrinking international market, coupled with the downward pressure of anti-dumping and other trade protection measures from major market countries, has entered the adjustment period. At present, the […]
-
Time：2020-1-19
In recent group development projects, we need to obtain data through the data interface provided by the background. What’s more, we don’t have a back-end. We can only pick up data from the Internet, upload the server, request JSON data, and complete the rendering of the front-end page. There are many holes in the middle, […]
-
Time：2020-1-19
1. Data preparation SET FOREIGN_KEY_CHECKS=0; — —————————- — Table structure for `admin` — —————————- DROP TABLE IF EXISTS `admin`; CREATE TABLE `admin` ( `a_id` int(11) NOT NULL AUTO_INCREMENT, `a_name` varchar(20) NOT NULL, `a_pwd` varchar(20) NOT NULL, PRIMARY KEY (`a_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; — —————————- — Records of admin — —————————- — —————————- — Table […]
-
Time：2020-1-19
Catalog 1.1. Understand the relational database 1.1.1 what is a relational database 1.1.2 entity relationship model 1.1.3 RDBMS 1.1.4 use SQL language to manage database 1.1. Understand the relational database Database is the collection of data in short. It is developed from the storage data of file system. The database system solves the concurrency problem […]
-
Time：2020-1-19
Recently, there are more and more database explosion events. Both individual developers and business owners are faced with slight risks. Many people have not specific security awareness, which gives hackers a chance to take advantage of. For enterprises, it may be a money disaster. Even if some enterprises are attacked by malicious servers, they are […]
