Outline of this paper:
Due to the large amount of content, this article will start directly from Chapter 5. For the complete version of the document, please click the link below:
Nanny level tutorial of data warehouse construction PDF document
The contents of the first four chapters are available at the link above
Chapter V core of real-t ...
Added by imurkid on Wed, 02 Mar 2022 12:58:15 +0200
In recent work, you need to optimize the previous web side code editor. As a back-end developer, although I'm not professional, I can only bite the bullet. After consulting a lot of materials, I still optimized some contents. Let's share them here. If there is something wrong, please forgive me. After all, it's very tired to play with pure hand ...
Added by michaellunsford on Wed, 02 Mar 2022 06:57:38 +0200
Python wechat ordering applet course video
Python actual combat quantitative transaction financial management system
Recently, a self-developed Dubbo registration center in charge often received alarms about CPU utilization, so it carried out a wav ...
Added by jevman on Wed, 02 Mar 2022 06:44:15 +0200
MySQL 5-day Express - day 3
Introduction to sub query Meaning: select statements that appear in other statements are called subqueries or intra queries External query statements are called external queries or primary queries Classification: Classification by location of sub query: After select from back Support table sub query After having or ...
Added by tim_ver on Wed, 02 Mar 2022 05:27:41 +0200
MySQL view, stored procedure, variable, function, transaction
Meaning: virtual table, but it is the same as that of ordinary table MySQL5. After 1, the characteristics appear through the data of dynamic production
create view View name
Create syntax Does it actually occupy physical ...
Added by martinacevedo on Tue, 01 Mar 2022 17:38:08 +0200
Application of php annotation
Comments are the interpretation and explanation of the code, and the comments will be ignored by the interpreter
Multiline text note
//Single line text note
Initial experience of php program
Each line of php code must end with an English semicolon
Added by scarlson on Tue, 01 Mar 2022 03:16:21 +0200
Chapter 15 stored procedures and functions
MySQL supports stored procedures and functions from version 5.0. Stored procedures and functions can encapsulate complex SQL logic. Applications do not need to pay attention to the complex SQL logic inside stored procedures and functions, but simply call stored procedures and functions.
Overview of s ...
Because spring boot usually simplifies the configuration and feels a little handmade, I handwritten JDBC and Mybatis in Mybatis class today. At the same time, there were several problems, which are recorded here.
0x01 JDBC insert Chinese garbled code
The code is as follows
The characters are still normal when the con ...
Added by devstudio on Mon, 28 Feb 2022 17:40:00 +0200
Constraint is to restrict the fields, so as to ensure the accuracy, effectiveness and integrity of the data.
Multiple constraints are separated directly by spaces
# Create a student table and set constraints for each field
create table student(
id int primary key auto_increment,
name varchar(10) not null unique ...
Added by markts on Mon, 28 Feb 2022 17:07:49 +0200
1.1 sorting rules
Sort using ORDER BY clause
ASC (ascend): ascendingDESC (descend): descending order
The ORDER BY clause is at the end of the SELECT statement
1.2 single column sorting
mysql> SELECT last_name, job_id, department_id, hire_date FROM employees ORDER BY hire_date;
Added by w3evolutions on Mon, 28 Feb 2022 14:30:46 +0200