Questions tagged [mysql]

MySQL is an open-source, relational database management system.

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53 views

Database normalization for grade management system

I am working on a grade management system web app for a university and I came up with this database schema How the app work: In the user table I am going to keep all the users data and the ...
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1answer
72 views

Design a login system

I have a task of designing login system with the requirement below: If the user login over three times, lock account for the first 5 minutes. The next failed 3 times login-in will lock the user ...
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3answers
248 views

Is it best practice to always try to return a minimum number of rows from the database?

First-time poster so please be gentle :) I have a rather large table in my database (MySQL in case it matters) that holds lat/lng values of certain points of interest around the world (table name: ...
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41 views

Fill Docker Container from existing remote database

I do have n nodes managed by Kubernetes, all of them running several containers. A container may contain a database alongside with an application. As containers should be stateless, all data within ...
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1answer
92 views

Variable WHERE clause while avoiding sql injection

I want the user to be able to provide a custom WHERE statement against a mysql-backed platform... do I need to worry about any possible SQL injection attacks notwithstanding invalid sql? See the ...
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6answers
5k views

Should I use DATE or VARCHAR in storing dates in MySQL?

Simply put, I have date and time attributes on an Orders table. The data types for these attributes are MySQL's DATE attribute. But everytime I echo the date and time in PHP it just gives me a string, ...
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34 views

What is best approach to designing a local-to-cloud cloud-to-local Infrastructure?

I plan to have a cloud web application(CWA) and several local web application(LWA), let's assume 3 LWAs and 1 CWA. CWA === LWA. This web application would consist of a database server, file storage ...
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22 views

Filter Gallery Images based on dropdown selection values

I currently making a "visual plan builder" with php-mysql, ajax and jquery Using multiple layers (z-index) I generate a visual plan with the following dropdown list values: Base Product - ...
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0answers
28 views

Scaling Order Management System for ecommerce

Tech Stack: I am using MySQL 8 with InnoDB engine. Application is built using Java with Spring & Hibernate. Database is hosted in AWS RDS and web apps in EC2. I have two primary tables for ...
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2answers
65 views

What's better, using DB or Storage services to save videos?

I am creating a website that allows to teachers to uploading courses, what's better, to just use the DB or should I use storage services, and how could I know the size of the videos? I am using AWS if ...
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1answer
114 views

Best practice to flatten JSON object and store it database

I'm fetching data from Clockify, flattening the JSON response, and storing it in the database where each property on the API response should have its own table's field. I have read this article about ...
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1answer
125 views

Does it make sense to have redundant DB fields to improve query performance, programming speed and code readability?

I am a bit torn about the database design for a solution. I have the following structure: (only the relevant fields are marked with #) +------------------+ | activities | |------------------| | ...
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1answer
104 views

Is deterministic SELECT possible without specifying an ORDER BY?

When we show a table with many thousands of records, we only show a small part of the total result set so as not to send too much data to the client at once. Clients can request more parts of the ...
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48 views

DataBase Design for frequent delete operations

We have a use case wherein we want to store incoming data and invalidate all the previously existing data pertaining to one parent entity. ie Parent p1 --> has List< child> old_data ( already ...
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1answer
73 views

Does DigitalOcean offer enough resources to run a scalable MySQL cluster?

I have a kubernetes from DigitalOcean that has 2 worker nodes and 1 load balancer. Now I want to create a MySQL managed database cluster for the app that will run on that kubernetes. Question is: does ...
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2answers
107 views

How can you avoid doing hundreds/thousands of queries when utilizing classes in PHP?

I have been dipping my toes into object orientated PHP programming and I'm finding it useful but I can't help but feel I'm missing something in regards to how to utilize it. Normally my classes and ...
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2answers
42 views

Does it make sense for a large scale SaaS project to use a single all powerful SQL/RDBMS database?

Scalability seems to be a thing now. I was in a heated argument with one of my developer who insist on using MySQL for a data intensive application we are building. MySql is easy, fits the purpose and ...
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2answers
140 views

Appropriate database schema

I'm currently collecting the data about flat prices. I have size, price, location, price per m2 and date of retrieving the data about flat(sample date). I'm plannig create MySQL database filled with ...
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0answers
36 views

Best way to integrate google signin in existing user registration system with PHP/MYSQL [Logic]

I want to integrate google signin, in our existing user registration system. But not sure which approach will be good in terms of data security + user experience (UX) + speed. Even if its a good idea ...
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1answer
4k views

Is it possible/advisable to combine unit testing and integration testing?

I've built a Python script that consists of about 20 functions that extract data from MySQL via .sql files (I'm currently trying to learn SQLAlchemy ORM), do something to it and then put it back in ...
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3answers
231 views

Is it reliable to compress database backups with git?

I'm working as an intern at a fund. I spent the last month building a website for internal use, and now I think it's a good time to set up a backup scheme for the MySQL database at its backend. Funny ...
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0answers
93 views

Should I decouple MySQL database?

I have two sites, one is a subdomain of the other. They both do different things entirely with one unifying goal. My intent is to have the main site do a majority of the heavy lifting, and the ...
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1answer
74 views

Database dictionary table versus code defined enum

For the following table structure, for the metric_id column, what are the advantages of having a JOIN dictionary table versus an ENUM dictionary defined in the code? Assuming the metrics dictionary is ...
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96 views

Best Architectural practices to combine Elasticsearch and Redis with MySQL

Idea: Multi-tenancy in 3 different layer Database: MySQL with multi database (database per tenant) Indexer: Elasticsearch Queue and Database load helper: Redis Problem: We have chosen to work with ...
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2answers
1k views

Is it okay to keep open the MySQL database connection open through out the Application or open and close connection query-wise?

I'm developing a REST API using Nodejs along with MySQL as the database.Is it okay to keep open the MySQL database connection open through out the Application or open and close connection query-wise ? ...
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16 views

Drag and drop and handling huge amount of documents to update position

I'm having a series of data as documents in a document db (CouchDB) Sample of a document looks like below { _id: xxx _rev: xxx data: xxx position: 1 } These documents displays in a web front-end ...
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1answer
67 views

Implementing a user ID system like Discords for a web app using Java Spring, JPA, Hibernate and MySQL

I’m trying to create a web application with a forum and user profile along with other functions. However I’m thinking about how I might implement an ID for each user. The best way I’ve seen other ...
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3answers
130 views

How should I store file history in a MySQl data?

I am creating a web app with JS and PHP where users can edit a file similar to a text editor such as notepad. I've decided to use a database to store these files. One of the primary functions of a ...
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45 views

Architecture to check for user properties in bulk?

We run an infrastructure in our organization, where a list of configs are provided and we check which config a given user satisfies. For eg: config_1 = {"a": 1, "b": 2, "c": 3} config_2 = {"a": 1, "b"...
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2answers
117 views

Is it true that ORM allows for changing the type of SQL that you use easily?

Hey so I have been looking into ORM since my last question and I am wondering. Instead of worrying alot right now about whether I will use mysql, postgre, or sqlite, would it be better to use ORM ...
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1answer
45 views

Best practices for creating structured data from “flat” SQL query results

Recently I've been working on a project to teach myself PHP and SQL, and as the project has gotten more complex I've been wondering what the idiomatic approaches are for creating the backend models ...
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2answers
515 views

Chat part of application - using UDP or TCP?

I'm trying to build a section of my app where two users can message each other. I've read about TCP and UDP and it seems like TCP is more suited due to ordered packet delivery. However, TCP requires a ...
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1answer
192 views

Which Software Architecture am I using? XAMPP, Apache, MySQL, PHP Android

I use XAMPP to host an Apache web server and a MySQL database. Most of the data processing is done on the user's mobile phone. After a certain activity, information of the user is sent to the web ...
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1answer
219 views

How to store nested data in efficient way in DB

We have daily 200-300 live projects which receive online traffic from our vendors across all our live projects. We store this data in two different DB (I know this sounds bad, but seemed good at the ...
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1answer
42 views

Ensure that Room No. of a Course's Section is within the permitted Rooms for that Course with some Constraint

I am facing difficulties establishing constraints in the following situation. This is a hypothetical scenario for practicing DB designing. Imagine, a rule in a School states that the Courses there ...
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1answer
174 views

Using the primary key as a foreign key

I have data spread across two tables shipments and shipment_data. Currently I have the standard auto increment primary key id for shipments and a manually assigned unique primary key id for ...
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2answers
518 views

If not used in a declared transaction but used in a try…catch will rollback do anything at all?

My questions are regarding the use of mysqli::rollback. If not used in a declared transaction but used in a try...catch will rollback do anything at all? (autocommit on) If it does work without a ...
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1answer
168 views

Write complex query OR write simpler queries and combine the results in Backend service?

Take the following statement for example: 'Get results for ALL Active students of a Course'. Naturally, this query has 2 parts, Get all active students of the course. Get results of those ...
2
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1answer
324 views

Hidden Input Fields for POST - Security

I have seen some posts on the subject of hidden input fields for use with postbut none were able to answer my question. I have a delete button tied to a user in a table. The delete button uses a ...
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0answers
41 views

PHP MySQL Secure Connection - Same Server

I have some php scripts that use mysqli() to connect to MySQL which is located on the same server. I currently have the connection stored outside of my sites root and I am using include() to make the ...
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3answers
444 views

Altering Database Tables on the Fly, why is this a Bad Idea?

I recently saw a comment on StackOverflow that basically said it is a bad idea to alter tables on the fly. In my case I have a json file that is storing some information about some "products". One of ...
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3answers
71 views

Architecture to show the number of results within the filter

I am building a web application connected to MySQL database that is supposed to work like an e-shop. User should be able to filter products, but I want to display the number of results that would be ...
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1answer
48 views

How can I transfer a users information in a dashboard page after he/she logs in?

I am developing a Bank Management Project. Now I am stuck in a point. I want to create a login page where a user will submit his/her username and password then after clicks on the login button, a new ...
2
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2answers
96 views

Server-side script to handle many near-simultaneous incoming XMLHttpRequests

I am building my own analytics platform, which I want to work like this... A JS script in each of my webpages collects data about users' clicking behaviours and sends that data to a PHP (or other ...
2
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2answers
674 views

Designing database: split into different tables or group them together?

I am fairly new to database design and now trying to build my own forum-based application. The app will have nested categories as countries > systems > levels > subjects In every subject ...
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1answer
81 views

Are there pitfalls to using only a remote database for a mobile app?

My research indicates that the ideal database design is: Mobile App -> Local Database -> Syncing -> Remote Database using something like PouchDB to do the data replication/syncing. But ...
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1answer
148 views

Strategies for Rotating MYSQL Encryption Keys

I have a web app that connects to a MYSQL database which has some encrypted data in it. The encrypted data is encrypted using the the mysql AES_ENCRYPT function and a key. Now, this key has been ...
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2answers
102 views

How should I update non-maintained database tables between production and development?

I'm working on a Django web application (with a mySQL back-end) that uses non-maintained tables(tables not modified by the web app). However, I have two copies of the data tables (one for production ...
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1answer
223 views

How to manage user serial keys for an application

I have an application in C# where several users access it. Each user will have a serial key associated with his username in a table users in a local MySQL database. Example of the table users: User ...
3
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1answer
511 views

Allow client side direct access to the database [duplicate]

I am asking advice from the SQL graybeards. Because my following proposition goes against everything I have practiced. In this instance Let's assume we are developing a phone app. A social network ...

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