Programmer Think

1, Necessary environment Recommend a URL analysis website, this website( http://music.zhuolin.wang/ )It's a little awesome. You can analyze VIP videos and VIP music. If you don't download a large number of music, you can search and download directly here, modify the file name after downloading, and click playlist - click sync on this website ...

qt login interface is simple to make, which is a real nanny level!!! Engineering innovation practice in the second week: create a form, design the user login interface (including user name and password), and realize the user login function. When the user submits the login button, he is required to obtain the user name and password data in the ...

About database operations: 1. Design background: With the development of information technology, computers have entered thousands of households. People's communication has become convenient and convenient for the life of Internet users! In addition, with the rise of excellence, Jingdong, Taobao and other online shopping platforms, online shop ...

Introduction to the Author Author: Lucifer Liu, member of the Chinese DBA Consortium (ACDU).Currently mainly engaged in Oracle DBA work, has been engaged in Oracle database development work, mainly serving the production and manufacturing, Automotive Finance and other industries.Now has Oracle OCP, OceanBase OBCA certification, good at Orac ...

background In the process of database design, we often add some general fields to database tables, such as creator, creation time, modifier and modification time. Sometimes, in the design process of some companies, each table is forced to contain these basic information in order to record some basic log records during data operation. According ...

Written test question 66: latest login date of each person of Niuke (I) Detailed description: please write an sql statement to query the last login date of each user, and press user_id ascending sort Problem solving ideas Group by userid and take the maximum login time source code select user_id, max(date) from login group by user_id order ...

Introduction: This paper will introduce how to do performance test based on TPCH data set in Hologres, and provide reference for test results to facilitate you to select product specifications. background information TPC-H (Business Intelligence Computing test) is a test set developed by the transaction processing performance Council (TPC) to ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python practical quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 How to troubleshoot and solve the MySQL deadlock problem in the production environment? This paper will simulate the real deadlock scenario for tro ...

Introduction to TiDB TiDB is an open-source distributed relational database independently designed and developed by PingCAP company. It is an integrated distributed database product that supports both online transaction processing and online analytical processing (HTAP). It has horizontal expansion or reduction, financial level high av ...

1, What is the window function? Window function is a special kind of function, which is used with the over keyword. As the name suggests, the window function is executed only in the window that meets the conditions. The object is each record in the window. A window can be understood as a collection of records, which contains several rec ...