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

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1answer
262 views

Is this a race condition?

I have a friend arguing this is a race condition, but I'm struggling to understand how. This is for a web application using PHP and MySQL where users can login and create tickets, these tickets have ...
0
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1answer
71 views

using node.js server with mysql-module and PHP for a penny-auction website?

I'm building a penny-auction platform like DealDash and just read into the WebSocket and node.js topic. I used PHP, MySQL and Ajax to build the website. I'm nearly finished and just have to implement ...
0
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0answers
7 views

Edit files on multiple domains on Mambo CMS

I have multiple domains on same web server, all running on Mambo CMS. Each site uses same template and has roughly same site structure. I need to edit the same page on each website - is there a ...
-1
votes
1answer
59 views

Withdrawal and bank balance in banking system [on hold]

I am making an online banking system(codes can be provided if necessary), my problem is with getting the balance of an account and withdrawal. How can i design this into the system, I can allow the ...
3
votes
4answers
120 views

How to save many changes to database data?

I'm working on a feature which will pull many (say, 1000-5000) rows from a database, display them to the user and allow the user to edit them. This editing may involve changing text; adding rows at ...
-1
votes
0answers
101 views

Is it better (performance-wise) to save data as physical files on the server or into a MySQL database? [on hold]

I'm working on a large project with minimal resources for a client. I was wondering what would be a better approach to increase the performance of the site, would it be better to save the user ...
-4
votes
3answers
2k views

How to not let anyone inspect elements of a webpage?

I was thinking to make some jQuery functions that will use ajax to control mysql. The whole idea is to make separate files of PHP (e.g query.php, addRow.php, update.php and delete.php) provide data to ...
0
votes
1answer
165 views

Should I use session or cache to keep the time it last polled when polling to server at intervals?

I'm building a web chat app using session to keep the time the app last polled so that the server can determine whether messages exist between the current polling time and last polling time. It works ...
1
vote
1answer
203 views

mySQL / PHP design pattern - one function multiple queries

So here's the gist of it. I'm looking for a design pattern where I can have one function, say queryHandler that gets the query and the parameters from a number of different functions and returns the ...
0
votes
1answer
93 views

Like structure table with Laravel and showing the most popular content at top

I am using Laravel to creating a website, my users can post questions and other users can write their comments under the post, each comment have Up vote and Down vote, and users can voting for ...
1
vote
1answer
88 views

Am I planning my database/backend correctly?

I'm an iOS developer and to be honest I'm not really looking to become a database expert right at this moment, but I do need to know how to properly plan out what I believe to be a pretty cookie ...
0
votes
1answer
93 views

How to structure programs that interact with databases? [closed]

I've just finished a book on MySQL and I'm in the infantile stages of learning to couple that with Java. I know that the technology I need to learn is called JDBC and that it essentially allows you to ...
3
votes
2answers
91 views

How to infer the result of a query?

To understand what a query does, I have always thought the following is the procedure on evaluating a query: Form the table as specified in the FROM clause. Pick the rows from that table as ...
1
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0answers
14 views

How to interpret correlated subqueries? [migrated]

Correlated subqueries are highly confusing me. Example query from here: SELECT DISTINCT store_type FROM stores WHERE EXISTS (SELECT * FROM cities_stores WHERE ...
-2
votes
0answers
18 views

ORDER BY is not working properly in MySQL [migrated]

The following is my SELECT query I want with ORDER BY with transType = 'I' and after that with transdate in ascending order. Through that query i can get transType = 'I' record properly but after ...
2
votes
2answers
433 views

Database performance comparison

I have been tasked with moving from a MSSQL backed database, entity framework code-first, wcf service based MVC application to a MySQL backed database. I have had being trying to find a performance ...
-2
votes
3answers
71 views

How to store integer array in mysql database [closed]

I am making a college attendence system so i need to store attendence of thousands of students. if I go for 1 column for each day then it will take 12*30 almost 360 column for a year. So I want to ...
1
vote
2answers
67 views

What is better for scalability for this specific dataset, MongoDB or MySQL?

I have a web app which has users, forms, and volunteers signed up on those forms. Currently I am using MongoDB and have it setup with a collection for admins, and a collection for forms with ...
0
votes
1answer
88 views

php Database operations in separate files?

I have a single page application. Select boxes need to be filled with select queries from the database. How do I structure the application? Currently I have a file add_details.php. It contains a ...
2
votes
2answers
235 views

Creating a separate table for images or adding “image fields” to many tables?

I need to create a database in which several tables have images. For example, users have profile pictures and uploaded ones and products have many pictures, as well. Is it better to have one MySql ...
0
votes
2answers
62 views

Best Way To Store Images For Mobile Synchronization

The scenario is, I have a Web Dashboard (Developed using PHP + MySQL) and have Android and iOS Apps synchronizing data from the Web Dashboard (only one way i.e. Dashboard to Mobile Apps) Now the ...
1
vote
1answer
235 views

Need to store Multiple Images (path) into MySQL after upload [duplicate]

I am trying to build my own little eCommerce CMS, and i want the expert opinion on how to handle multiple uploaded files (images). For Example: A user adds a new item, fills the necessary form data ...
2
votes
1answer
85 views

How to deal with server-side and client-side naming conventions that clash? [closed]

I have a project that uses the underscore naming convention for the MySQL database and PHP scripts but uses camelCase for the javascript application (a common scenario I'm sure). However, once JSON ...
0
votes
3answers
115 views

When to use a nosql database such as mongodb over mysql?

I'm new to the concept of nosql databases and have never used it. Based on what I've read and the little that I've understood I still don't see how they can be particularly useful if you can't make ...
0
votes
2answers
46 views

DB Schema for a questionnaire - Different output from different combinations of responses

A user is required to complete a questionnaire - answering the questions in various categories. Depending on the responses from the user, the user will be presented with a number of recommendations. ...
2
votes
1answer
231 views

Should I use foreign keys in my database if I use laravel?

I'm creating a website with Laravel for the first time. I checked relationships documentation today and it seems that Laravel just uses simple SQL queries. class User extends Eloquent { public ...
49
votes
6answers
5k views

Should Latin-1 be used over UTF-8 when it comes to database configuration?

We are using MySQL at the company I work for, and we build both client-facing and internal applications using Ruby on Rails. When I started working here, I ran into a problem what I had never ...
1
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0answers
32 views

Database integration of Rails and Laravel apps

I have some very small apps on a VPS running ruby on rails and a co-worker also have some of his own apps running on laravel at another VPS. So far we dont needed to share any data among the apps, but ...
2
votes
1answer
100 views

How to design database tables for a Factory class?

How can I design database table structure for a class that varies in its core parameters, when it is created by a factory method? I have a Factory like this: class ProductFactory { public ...
3
votes
3answers
246 views

Do I need use really INNER JOIN?

Imagine a coiffeur, with his services: +----+-----------------+--------+ | id | name | amount | +----+-----------------+--------+ | 1 | hair cut | 40 | | 2 | shampoo | ...
0
votes
0answers
60 views

What could possibly be a Mysql database structure for an web app say like Flurry?

Simply say, I'm working on a web App say like Flurry (http://www.flurry.com/), that would communicate with a Smartphone App trough API. Right now I'm designing the database structure, and I guess ...
2
votes
1answer
91 views

What should be the structure of a person to person store database?

I am going to create a person to person store with Laravel, a website where its users can share and sell their product or their mobile, TV, Computer, Shoes, Shirts, Books, Cars, Bags, Animal, etc. I ...
2
votes
1answer
136 views

What is the purpose of stopwords?

I've just started learning about fulltext indexing and searching in MySQL and I've stumbled upon this list containing all of the "stop words" used in MySQL. I cannot understand what is tue purpose of ...
2
votes
0answers
105 views

PHP MySql - Statistical Reporting - Best Approach to query appointment system time utilization

I have built an appointments system for various medical practices. Practice schedule appointments - I am looking to provide analysis on the amount of time that has been utilised by the practice. I ...
3
votes
1answer
244 views

What is the best way to format complex SQL queries in Node?

I am using node-mysql to query a MySQL database via Express and Node. My queries are getting fairly complex and I want to format them across multiple lines. However, the only way I could accomplish ...
0
votes
1answer
522 views

Designing a scalable schema for college database [closed]

I am trying to build back end for college ERP system. The system will be based on LAMP. These is the scenario: Colleges have 5 branches There are 4-6 classes in each branch. There are 80 students ...
0
votes
0answers
29 views

Querying all data vs required data [duplicate]

If I have a MySQL database that has a table that contains user data, would it be better to load all of the data from the table when loading a page that requires a users data (only one users data is ...
1
vote
2answers
189 views

Improve the speed of a Tomcat Server with MySQL

I'm developing an application with 3 sides, desktop (JavaFX), server (Tomcat) and Android. And a MySQL Database Server. The app receive mails and convert them into tasks. The tasks are sent to the ...
1
vote
1answer
39 views

Should I do a different SQL table for user privacy settings or just keep it at the users table?

So I am developing a Web Application and I have some concerns about the database. I use a lot of boolean settings at the user table with the form privacy_allow_1, privacy_allow_that, ...
0
votes
0answers
29 views

I have two applications… use NoSQL or RDBMS? [duplicate]

I have two applications in the making: one is a budget management tool; the other is a article based places/restaurant guide. The budget management tool works where users create accounts (e.g. bank ...
0
votes
1answer
168 views

Notify about starting event

I am having quite a hard time figuring out how to solve this problem. Basically I have a mini social network with notifications and events. I want to add such functionality where 1 day before an event ...
0
votes
1answer
127 views

DAL / Model / Application-Design Question for a MVC Application

I have a device that stores raw binary log data as a BLOB in a MySQL DB. That process is a blackbox to me (closed source) which I cannot change. I know, however, how to decode that BLOB and transform ...
-1
votes
1answer
107 views

Best way to track 200 boxes [closed]

I have a php/mysql application that needs to track a simple on or off setting for 200 boxes. I use it for a fundraising application. Basically there are 200 buttons. A user selects a button numbered ...
1
vote
0answers
64 views

Automatically verifying INSERTs when building a PHP(5.3.3) application

I am building a form in PHP. I would like to automatically verify that INSERT queries are successful, and populate data correctly, as opposed to running queries in Workbench or MySQL with every code ...
3
votes
1answer
1k views

Architecture for a mobile (Android) chat application

I want to develop a chat application that reminds a bit whatsapp, I am doing it as a learning project. I am currently doing it on Android just because I am doing an Android course. The requirements ...
0
votes
1answer
2k views

Practical mysql schema advice for eCommerce store - Products & Attributes

I am currently planning my first eCommerce application (mySQL & Laravel Framework). I have various products, which all have different attributes. Describing products very simply, Some will have a ...
0
votes
1answer
120 views

Improve processing of data (and structure) from flat file to CMS Database

I have a flat file (CSV) that brings me the data I want, but it needs to be cleaned and processed before it can be used, so I built an intermediate Database (MySQL) in order to get the structure from ...
0
votes
2answers
150 views

SaaS model, 1DB per client

The context we're building a web-based system and one of the design decisions (database related) was whether to have 1 main DB manage all client data VS having 1 DB per client. After reading a lot ...
0
votes
1answer
190 views

RDBMS (MySQL) logic question. How to join multiple “FRIENDS”

so this is a logic question as to creating the proper relationships in a MySQL database. What logic would you choose for the following scenario? This is a back-end for an app where people can have ...
1
vote
3answers
1k views

How do I approach this PHP/MYSQL query?

I have a reservation system that I have coded and my final task is to allow the user to enter a set of dates and then show them all available options. The reservation table is set up with unit_id, ...