Database design - MySQL database integration of two systems

1. There are currently systems A and B, and B is the upgraded system of A; 2. The structure of most database tables in the two versions of the system mysql database is the same, and the data of A can be directly integrated into another system B; but there is still Some tables have different structur...

巴扎黑 2017-05-18 10:54:00 0  3  865

How to use multiple databases in Laravel

I want to combine multiple databases in my system. Most of the time the database is MySQL; but it may be different in the future, i.e. the administrator can generate such reports, this is the source of using heterogeneous database systems. So my question is does Laravel provide any Facade to handle ...

P粉919464207 2023-10-13 09:54:58 0  2  651

javascript - Various design discussions on the interface main menu generation logic

The main menu is the kind of background management system in which you can control whether to display a certain menu or a certain function in a certain menu through configuration. Regarding its design and implementation, my personal summary is as follows. (1) Use a database table to save the main me...

大家讲道理 2017-06-26 10:49:08 0  1  722

**Error type: Unable to iterate 'NoneType' object**

I want to use ssh tunnel to access Mysql database. Unfortunately, the architecture of this code does not seem to support my query format, as the function does not appear to be compatible with my query format. /Users/peter/PycharmProjects/MySqlLocalhostTest/venv/lib/python3.10/site-packages/paramiko/...

P粉141035089 2024-04-06 10:26:38 0  1  544

How to solve the following problems

ORA-01589: must use RESETLOGS or NORESETLOGS option for database open. The ORACLE database virtual machine was cloned. The database was not closed during cloning. When the cloning was completed, an error occurred and the database was enabled and could not be started. Reason: The database stopped abn...

薛冬冬 2021-04-07 16:53:00 0  0  945

node.js - Parameter passing problem in node+express+ejs. When passing parameters, it always prompts that the parameters are undefined.

Briefly describe the structure: {code...} The connection between the three is to get all the articles in the database through admin.js, pass them to list.ejs through locals.list, and then render list.ejs to index .ejs partial. The following index.ejs is introduced through include to obtain the backg...

给我你的怀抱 2017-06-05 11:08:33 0  1  1125

Java score management system?

The course assignment requires the development of a Java score management system with the functions of query, modification, sorting, maximum value, and minimum value. To display in a form, the grade data is imported using an imported txt. Looking for general directions, do I need to use a database?

ringa_lee 2017-06-12 09:22:53 0  4  1114

Insert only enabled textbox into MySQL in VB.Net

I'm creating an inventory management system in VB.Net whose basic functionality is to process incoming invoices. I want to insert data into my remote MySQL database, but only if the textbox is considered enabled. I have no problem inserting data into the database when I want all fields to be inserte...

P粉043432210 2024-02-21 19:42:03 0  1  424

How to represent inheritance in database?

I'm thinking about how to represent complex structures in a SQLServer database. Consider an application that needs to store details about a series of objects that share some properties but have many other uncommon properties. For example, a business insurance package might include liability, motor, ...

P粉041856955 2023-08-29 13:56:14 0  2  599

python - If I need to display other fields on the Django page, should I change the data table structure and add a field? Or search and add it in the view function, and then display it in tem.

If I need to display other fields on the Django page, should I change the data table structure and add a field? Or should it be displayed to tem after processing is completed in the view function? Which of the two methods is better at the system level? Can you introduce the advantages and disadvanta...

大家讲道理 2017-06-30 09:54:23 0  1  1091

Does "select exists" still return true in my function?

I slightly modified the SelectExists function I found on stackoverflow, but no matter what I try, my function below always returns $sqlResult as true. Even though I only keep two entries in the database. Are Selectexists still valid? None of the answers suggested by the stackoverflow system answered...

P粉236743689 2024-03-28 10:14:58 0  1  427

A typical low-code generation system with separate front-end and back-end, based on Thinkphp Vue ElementUI

This is a typical development framework with separate front-end and back-end, and many front-end and back-end codes can be generated very well without writing code, which greatly reduces the amount of code written by programmers. Improve efficiency and reduce costs! The rapid development system base...

Thinkphp Vue RDS 2022-07-21 08:31:41 0  0  806

The method of defining dynamic keys is in redux's initialState

I have an e-commerce website where each user has a shopping cart and I use redux and reduxpersist to store it in local storage. I want to handle multiple accounts on one computer, if a user has two accounts, he can switch between the accounts and the data related to each account will be displayed, m...

P粉478835592 2023-09-05 14:15:53 0  1  550

How to add a column in select query with right join

I'm trying to find a way to add a country code to a database call record based on a phone number column. I have a table that contains countries and their dialing codes (called countries). I can query all records and append the country code, but I need to be able to filter and paginate the results. I...

P粉564192131 2024-01-10 18:08:33 0  1  446

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  830

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  730

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  619

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  581

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  1009

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  508