Initial database SQL
First knowledge database Database is a data set that can be accessed efficiently by saving a large amount of data and processing it by computer. This data set is called a database (DB). The computer system used to manage the database is called Database Management System (DBMS). type HierarchicaUTF-8...
Posted by julieb on Thu, 14 Oct 2021 12:04:14 +0530
mybatis learning notes-01
Start the time of self-study mybatis. Meet mybatis Official documents of mybatis: https://mybatis.org/mybatis-3/zh/getting-started.html MyBatis is an excellent persistence layer framework, which supports custom SQL, stored procedures and advanced mapping. MyBatis eliminates almost all JDBC codUTF-8...
Posted by vapokerpro on Fri, 15 Oct 2021 00:38:46 +0530
Data structure - sequence table
Sequence table Sequential table is a linear structure in which data elements are stored in sequence with a storage unit with continuous physical addresses. Generally, array storage is used. Complete the addition, deletion, query and modification of data on the array. The essence is array, but oUTF-8...
Posted by eyeself on Fri, 15 Oct 2021 06:14:33 +0530
python gadget - count your own code
py gadget - count your own code 1-1: idea I used to think that I could count the amount of code for a period of time to see how much code I wrote. Although there are plug-ins that can automatically count, they are still ready to write their own. 1-2: overall idea: To count the number of code liUTF-8...
Posted by Rabea on Fri, 15 Oct 2021 07:07:50 +0530
Crazy Redis learning notes
Nosql Nosql = Not Only SQL It generally refers to non relational databases. With the birth of web2.0 Internet, traditional relational databases are difficult to deal with web2.0. In particular, large-scale and highly concurrent communities have exposed many insurmountable problems. Nosql is devUTF-8...
Posted by mkarabulut on Fri, 15 Oct 2021 09:23:41 +0530
34 - blog website database - blog information data operation
34 - blog website database - blog information data operation (I) Project description Nowadays, online microblog and blog publishing information have become the main information publishing and dissemination system. How to manage these data, this project mainly operates the blog classification inUTF-8...
Posted by abhi_elementx on Sat, 16 Oct 2021 02:12:01 +0530
2021-10-15 ② enterprise zabbix monitoring installation and deployment is the most detailed in the whole network
Establishment of Zabbix enterprise monitoring system There are three CentOS 7.4 system servers, one as the monitoring server and two as the monitored nodes. The yum source is configured, the firewall is closed, the clock service of each node is synchronized, and each node can communicate with UTF-8...
Posted by auday1982 on Sat, 16 Oct 2021 03:03:23 +0530
MySQL -- multi table query
1) Inner join query – inner join Syntax 1: select f1,f2,f3... from table1 inner join table2 on Association matching criteria Grammar 2: select f1,f2,f3... from table1,table2,table3 where Association matching criteria (1) Self connection Concept: it is a special equivalent connection in internalUTF-8...
Posted by fugix on Sat, 16 Oct 2021 03:33:28 +0530
MySQL Basics (self taught)
##Objectives of this unit 1, Why learn database 2, Related concepts of database DBMS,DB,SQL 3, Characteristics of database storage data 4, Initial MySQL Introduction to MySQL products MySQL product installation ★ Start and stop of MySQL service ★ Login and logout of MySQL service ★ Common commaUTF-8...
Posted by duk on Sat, 16 Oct 2021 10:17:00 +0530
Some supplements to mysql database
Database concept A database is where data is stored. In the computer, in the memory and in the hard disk, everything is stored in the database. The place where these data are stored is called the database. It can also be called electronic "filing cabinet". The database in computer science and UTF-8...
Posted by jmgarde on Sat, 16 Oct 2021 10:54:07 +0530