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

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478 views

What's the best way to track updates when syncing data from MySQL remote server to local SQLite database?

I'm making an iOS App, well, two actually. App A will be able to write TO-DOs to a remote MySQL database, and App B will be able to read what App A has written/modified. App B needs to be always up-to-...
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2answers
178 views

How to fit requirements into MVC

Let's say we have a website requirement to allow User functionality. Simple! We create the UserModel, UserController and UserView. Works perfectly. However, let's assume that User has a many-to-one ...
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1answer
181 views

Algorithm to generate Edges and Vertexes outwards from origin with max multiplicity of 3

I am creating a 2d game for a website where the universe can grow extremely large (basically infinitely large). Initially, the universe is composed of 6 stars that are an equal distance from the ...
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1answer
42 views

Updating all records in MySQL table while still available to the user

I have this 'table A'. It contains two columns; email and email_alias. A sample is below: ===================================== = email | email_alias = ========================...
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1answer
132 views

Question(s) about PHP PDO connections

Let's say I have a Db class [ db.php ] : <?php class Db { // class properties private $db_driver = ''; // dsn credentials private $db_dhost = ''; private $...
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1answer
184 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 ...
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1answer
181 views

How to implement a Daily Recap email of Database records modified the previous day sent to Subscribed Users like Basecamp does?

I am building a Project Management module for SugarCRM. It consists of a "Project" which has information on the project like Name, description, start and completion dates, creator name, status (open,...
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1answer
406 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 ...
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1answer
75 views

Migrating MYSQL functions and stored procedures to SQL Server

The company i'm working for is selling HRIS management software. It was built using ASP and mysql. But one of our client's demand is for it to be based on MS SQL Server. our team is made up mostly of ...
4
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0answers
105 views

Using mysql 5.7 Json Columns for EAV

I am developing an e-commerce product and I have been able to implement all functionality and am left with allowing users to create additional attributes for a product. Right Now I have two options. ...
2
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0answers
259 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 ...
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0answers
39 views

Compiling data from multiple API sources, multiple languages, into a single database (MySQL or Mongo)

I'm thinking about a database schema, and would really appreciate if some of you could look at where I'm up to and offer some advice.. The mission - We have to write a program that will fetch data ...
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0answers
2k views

Android, PHP session and JSON object retrieval

I am working on an app in android studio.. it currently has a login and registration system that are linked to a database and both work perfectly. I am now trying to carry over the user id value ...
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0answers
36 views

how to reduce or stop duplication of relation's entry in treeview

I want to create tree-view for display or show family member's relation. For this I created 3 tables i.e following. familyDetails->[f_id,fname,lname] relations -> [r_id,relation] .....//e.g ...
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0answers
70 views

how to create triadic relations in laravel framework

I need to create triadic relation in laravel framework. Consider three models: Card, Notes, User. Card is related to notes and user, while they are related to each other. Now in models, when the ...
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0answers
9 views

Updating user input based parameter in google search document

I am trying to implement rating system in google app engine and trying to use search API to maintain documents that has update rating. I will not use these rating to query but I want those rating to ...
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0answers
18 views

SQL data model for nested milestones/timframes

I'm currently weighing different approaches to a data model and I'm curious what others would do. The main nugget of info is ACTIVITIES, which belong to a chain of milestone time releases. Stages ...
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0answers
88 views

BCMath vs MySQL: performance

Scenario I am working on a web application that handles financial transactions, and my code will need to be reusable for everything from consumer carts to manufacturer/distributor shipments. The ...
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0answers
43 views

Advice on paging tree structured data

I'm in the process of building web based a commenting system, for which the comments are rendered in a reddit / disqus style tree structure. The MySQL schema uses a string of ancestor id's, and the ...
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0answers
404 views

Best practice: dynamically handle variable data, multiple file uploads and encoding with jQuery, AJAX, PHP and MySQL

I'm currently writing an e-learing web-application. I'm sorry if this is information overkill but I think it's better to describe it in detail so you get the idea. I have made thought on every point ...
0
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0answers
195 views

embedding LEFT OUTER JOIN within INNER JOIN

I am having some problems with one of the question's answered in the book "SQL FOR MERE MORTALS". Here is the problem statement Here is the Database Structure Here is the answer which I am ...
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0answers
49 views

MySQL left join + performance

SELECT * #Case 1 cp.* #Case 2 FROM crawl_page AS cp LEFT JOIN artist AS a ON cp.cpURL LIKE CONCAT('%',a.artistPageID,'/',a.artistPageURL,'%') ...
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0answers
16 views

Shuffling of MCQ's in my examination portal

the screen shots attached are structure of database of my exam portal, one picture represents the question bank and second represents the test details.Test ID is acting as a primary and foreign key. ...
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0answers
21 views

submitting a post request with an empty field does not update the previous value to an empty string

I have the following line, where the value may become outdated and need to be cleared. However, the database only updates when the value is changed to some non-empty string. <textarea name="...