Lesson 101 predefined super global array ① - principle analysis
Interface:
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Posted by mart on Sat, 25 Jan 2020 07:17:17 -0800
MyBatis 07-Dynamic SQL-Caching Mechanism-Reverse Engineering-Paging Plug-in for Java Framework
MyBatis
You are studying on the first day of the New Year!Don't learn what to do, fight the landlords... people are not together.Learn, study makes me happy!In addition to the responsibility of poems and distant places, I also want to be responsible, but concubines can not do it. What should I do?What do you say? Why can someone else not do it ...
Posted by smith.james0 on Fri, 24 Jan 2020 22:45:11 -0800
Android Notepad applet development
In recent days, I have made a notepad applet with my current Android development knowledge. I would like to share the development process here, hoping to help beginners like me.
The development tool is Android studio, the background language is java, and the database used is Android SQLite database. The functions and renderings are as follows:
...
Posted by arimakidd on Thu, 23 Jan 2020 06:21:50 -0800
Web Foundation - Servlet&HTTP&Request
Article Directory
Servlet:
HTTP:
Request:
Case: User Login
Servlet:
1. Concepts
2. Steps
3. Principle of execution
4. Life cycle
5. Servlet3.0 Annotation Configuration
6. Architecture of Servlet
Servlet--Interface
|
GenericServlet -- Abstract Class
|
HttpServlet -- Abstract Class ...
Posted by Gordonator on Wed, 22 Jan 2020 19:12:20 -0800
MySQL - UPDATE query based on SELECT query
I need to check (from the same table) whether there is an association between two events based on date and time.
One set of data will contain the end date time of some events, and the other set of data will contain the start date time of other events.
If the first event completes before the second, then I want to link them.
So far, I ...
Posted by coppercoins on Wed, 22 Jan 2020 07:36:43 -0800
Java Web realizes the function of simple registration and login - (Registration)
The registration and login function implemented here is the content of a big assignment after learning java web course. It does not involve any framework technology, but is made up of basic knowledge It is. It's suitable for children's paper that just started to touch the web.
——Home page: ...
Posted by shoppingspree on Wed, 22 Jan 2020 00:32:56 -0800
Database for Go Web Programming
Summary
A database is used to store data.As long as it's not a toy project, a database is needed for each project.MySQL is still the most used. PostgreSQL Use is also growing rapidly.
In Web development, databases are also required.This article describes how to operate a database in Go Language based on MySQL.This article assumes that you alrea ...
Posted by sri.sjc on Tue, 21 Jan 2020 14:59:48 -0800
ADO.NET basic summary and example introduction
1, When it comes to ADO.NET, it is often confused with ASP.NET. There is a big difference between the two. There is no comparability. Here are the differences between the two before:
**ADO.NET is a set of object-oriented class libraries used to interact with data sources (databases). * *
1. ASP.NET is ...
Posted by feest on Tue, 21 Jan 2020 06:13:06 -0800
How to execute the equivalent SQL Join in MongoDB?
How to execute the equivalent SQL Join in MongoDB?
For example, say you have two sets (users and comments), and I want to extract all comments with pid = 444 and user information for each user.
comments
{ uid:12345, pid:444, comment="blah" }
{ uid:12345, pid:888, comment="asdf" }
{ uid:99999, pid:444, comment="qwer" }
users
{ uid ...
Posted by cyh123 on Tue, 21 Jan 2020 03:00:52 -0800
Using jar to connect and operate MySQL database
Why use database
If you want to ask where the data comes from, it may be that no matter where Xiaobai has been working for many years, he will say in unison, of course, database. So why use database? Extract: database is a "record keeping system" (the definition emphasizes that database is a ...
Posted by jimmyo on Mon, 20 Jan 2020 23:18:55 -0800