does the red box checkbox use the current page or all pages? ...
now many laptops recommend setting the zoom to 125% and magnifying the display proportionally. : when the logo on both sides of the top and the white space on both sides of the menu are less, zooming in may result in incomplete display of the logo a...
23 design patterns, which are generally written as follows: Design patterns are divided into three categories: Creative patterns, with five types: factory method pattern, Abstract Factory pattern, Singleton pattern, Builder pattern, and prototype pat...
What s the difference between producer-consumer model and publish-subscribe model ? I feel the same. I read some articles but I m not sure. ...
Shopping system, how to make the sub-table in the commodity evaluation table? on the one hand, users need to check the reviews they have written, and on the other hand, merchants also need to check the reviews of their products. it will be troubl...
how to design if there are multiple systems to share user information? for example, Alibaba has a series of product systems, such as Alipay, Taobao, Tmall, Aliyun, and so on, but as long as you register any of these products, you can also log in with ...
RT A user belongs to a group, each group has multiple users, and each group has a group leader user (table) userid groupid . group (table) groupid ownerid . such a design from the ER diagram, each of the two tables has a 1-to-N connection to...
< H2 > the beginning of everything < H2 > suppose there is a story in which the beginning of the story is to manage the user s information. the main information of users is: id name nickName password mobilePhone validateCode gender birthday ...
ask a question: (suppose) I want to be a mall in the cup industry, and then sell the mall to various cup merchants. My personal idea is to be a general mall, sharing a backstage and a set of databases. If there is a merchant who wants to customize the p...
there are system An and system B. system An owns database An independently, and system B owns database B. system An and system B share a set of user information database, database C. Database C stores all the information about the user, such as name...
is doing order data statistical analysis, because the order quantity is too large, the order needs to be preprocessed. At present, the plan I think of is: 1. Keep the daily sales quantity and amount of member stores, but due to the low activity of most ...
I now provide interfaces to the front end. When designing an API, should I try to complete an operation in one API or split it into multiple API? for example, do a function to upload a picture, upload the picture to the file and return it to url, an...
< H2 > question < H2 > there are two independent systems. System An is the class information management system and system B is the book management system. the current design idea is that system An and system B are divided into two independent busines...
problem description for example, in the voting of 1W people, suppose there are 1000 people online at the same time, how to design the database and what configuration should be chosen for redis? configuration of redis + mysql database ...
A drop-down box supports multiple selections, supporting both and and or queries brand = Volvo and brand = Saab brand = Volvo or brand = Saab Is there any good way to display the page? Is it like this down there? <html> <bod...
for example: has a Company company class, Company company class has a List < User > user list, and User class has an Address class that holds several addresses for users. well, now there is a system design idea: pass a company id to the backend, a...
Hello, everyone. At present, there is a database query design problem: action table: user_id, action_detail 1 "action_click" 2 "action_drag" user info tablle user_id, full_name, email 1 "User One&q...
1. For example: I now have a need to obtain student data, query data according to student primary key and student status, and query data according to student primary key and student name should I write these two in one SQL to deal with, or write two SQ...
there is such a requirement: user login module, does not support the choice of login method, only a text input box, while supporting: QQ number, mobile number, e-mail, nickname, ID card, etc. (if the user filled in the values of these five fields) any f...
has the same function as DiDi. The driver cannot see the passenger s mobile phone number directly, but can contact each other smoothly. the passenger receives the call from the driver. The number displayed is a processed number (but the same as the re...