Tag：information
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Time：2020-5-25
When using the command line to connect to MySQL, we are executingSHOW DATABASESWhen you command, you will find that there is another database namedINFORMATION_SCHEMAWhat is this representation used for? In mysql,INFORMATION_SCHEMAIt is used to access database metadata (such as database, table name, column data type or access permission, etc.). In each MySQL instance,INFORMATION_SCHEMAIt saves the […]
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Time：2020-5-25
2019/11/2 1. A style of World Wide Web software architecture, which aims to facilitate different software / programs to transfer information to each other in the network (such as the Internet). Presentation layer state transformation is a set of constraints and attributes based on Hypertext Transfer Protocol (HTTP), which is a software construction style to […]
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Time：2020-5-25
Due to business adjustment, the company’s fone system needs to add parameters to the sap interface to obtain information. Adjust the interface and add account in tables. After the interface adjustment is completed, the field account not a member of table is read and reported as an error. After checking the sap interface, […]
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Time：2020-5-23
You don’t manage money, money doesn’t care about you! Can Python help you with your finances? Effect preview Trend chart of cumulative yield Basic information results How to use: Python 3 + some third-party libraries import requests import pandas import numpy import matplotlib import lxml to configureconfig.json 。codeAllocation fund code,useCacheWhether to use cache. { “code”:[ […]
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Time：2020-5-22
Practice based on EMP table under Scott user in Oracle Database Query all tables under Scott user select * from tabs; Query all information in employee table select * from emp; Query employee number, name, job, salary. select empno,ename,job,sal from emp; Query employee number, name, job, salary, list title in Chinese. Select empno “employee number”, […]
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Time：2020-5-21
When developing a project, the configuration information of the production environment is different from that of the development environment. It’s always troublesome to switch. Now we can distinguish between the online production environment and the local development environment by setting the server environment variable. For example, we can set runtime_ Whether the environment is’ dev […]
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Time：2020-5-16
Oracle foundation – single line function exercise (1) Practice based on EMP table under Scott user in Oracle Database Query all employee information in department 30 select * from emp where deptno=30; List the names, numbers and department numbers of all clerks select ename,empno,deptno from emp where job=’CLERK’; Find out the information of employees whose […]
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Time：2020-5-15
Why write this script When I was preparing for work before May 1, I saw that my colleagues were doing a complex manual operation, i.e. one field for one field for one data dictionary of a table in the database. The speed can be imagined how torment and exercise people’s will and patience. Anyway, it […]
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Time：2020-5-14
1、 Overview Intrusion detection system (IDS), which monitors the system and network in real time, will give a warning once it finds any abnormal situation. According to the information source, it can be divided into host based IDS and network-based IDS. This paper mainly introduces the host based intrusion detection system System (abbreviated as HIDS) […]
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Time：2020-5-13
JWT is an abbreviation for JSON web tokens. Since it’s called JSON web tokens, JWT tokens really contain multiple JSON objects. Why multiple JSON objects? Because SWT token is actually composed of three parts, two of which are in JSON format. These three parts are header, payload and signature. 1. Message headerThe header information consists […]
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Time：2020-5-9
Android source code uses the repo command to manage all git warehouses. When using the repo forall – C command to execute the specified git command on all git warehouses, the project name of each git warehouse will not be listed by default. For example, when using the repo forall – C git status command […]
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Time：2020-5-8
redis-monitor A redis monitoring program with web visualization and performance optimization is completed by using Flash + SQLite, which is simple to use and easy to deploy. Open source address What The monitoring data includes the following: Redis server information（redis.info()）, including redis version, online time, OS system information, etc Real timeMessage processing informationFor example, the […]
