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

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0answers
16 views

Accessing large lists of words PHP Array or MySQL

I'm creating an application that grabs a list of words, and mashes them together. Example: Hello, World, Coding Output: Helld, ingdld, Codrld I want to have many lists of words. I originally was ...
-4
votes
0answers
25 views

Form not saving data to MySQL Database [closed]

Please let me know how I can save the form data to my MySQL database. Currently I am using the following codes: the html form: <form id="signup-form" method="post" action="save.php"> ...
-1
votes
0answers
40 views

Business difference between MariaDB and MySQL [closed]

Can anyone tell me what's business difference between MySQL and MariaDB. I know that MySQL Ab made money on services (support, training, paid for development) and dual licensing. But I am lost about ...
3
votes
1answer
50 views

PHP mysql checking for relational equivalence

Suppose I have a users table and in that users table I have a role_id. In my roles table I have: users - id - role_id roles - id - name roles id | name 1 | admin 2 | normal Now ...
2
votes
0answers
42 views

How to run WordPress across 2 VMs for high availability [migrated]

Microsoft Azure requires that applications utilize two instances across multiple data centers in order to achieve their "high availability" SLA and ensure your sites don't go down for routine ...
-1
votes
2answers
49 views

Creating Objects from a JDBC ResultSet, best practice?

I'm still in the process of learning JDBC and web services (currently forced to work with SOAP, but more interested in REST). I want to save each table row from the ResultSet in it's own object. There ...
3
votes
2answers
154 views

Do I need a web-service for this case? Data-synchronization over multiple clients

I'm new in this area and a little bit confused about my current thoughts on a web-service implementation for my application. I want to synchronize all connected clients with the current data on a ...
-2
votes
0answers
34 views

PHP mysqli adding multipe entries for one insert [migrated]

the following short PHP code should be adding 1 entry into the database table. however when I run this I find 3 identical entries. MySQL Server version: 5.5.39 - MySQL Community Server PHP/5.4.31 ...
0
votes
1answer
230 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 ...
3
votes
2answers
122 views

Design interface for WebService to access several MySQL databases

I am currently trying to design an interface for a WebService that can access several MySQL databases. There will be 4 operations available, Add(), Read(), Update() and Delete(). The WebService just ...
0
votes
1answer
53 views

Algorithm to maintain a blog sign up page

I have a functional sign up page for a blog that updates a database with a users name, email, profile picture and a short bio. The General information page and the profile picture upload/bio page are ...
0
votes
1answer
270 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
4answers
174 views

Java desktop app with mysql database

I'm currently in the process of learning Java and swing and in doing so am trying to create a desktop app. As part of this app I have set up a mysql database which the app is connected to, however ...
1
vote
0answers
40 views

Storing/caching SQL query

If I have a very long-winded SQL query (that has multiple subqueries), but the result of which is unlikely to change from hour to hour (or even day-to-day, or possibly even week-to-week) is there some ...
1
vote
1answer
68 views

Is it safe to only use intval to sanitize user input for a database select?

Is it safe to only use intval to sanitize the user input for a database select, as in the following example? $id = intval($_GET['id']); $query = "SELECT * FROM table WHERE id='$id'";
0
votes
3answers
237 views

How can I keep browser URL secret when editing data?

Suppose, There is a user list. <a href="user/5">Edit</a> <a href="user/6">Edit</a> When a system user clicked to edit a user info. Then it goes to url to browser like as ...
1
vote
2answers
46 views

Process string before or after insert into mysql

I have a device network where each device has different sensors (temperature, humidity, etc..). Each device uploads raw measured weather data every 10 seconds to a apache/php/mysql REST API. There are ...
1
vote
2answers
123 views

Composite Primary Key drawbacks

For website that I maintain (eCommerce) I now need to make a table that seems to require Composite Primary Key of 5 columns. I never used 5 column as primary key before, only 2 and rarely 3. I ...
1
vote
1answer
95 views

Add arguments to mysql in Django's “dbshell”

I'd like to add a couple of command-line arguments to my Django's ./manage.py dbshell command, and I can't figure out how. In specific I'd like to add -A to prevent MySQL from scanning every table ...
4
votes
1answer
465 views

Multi-platform design with Delphi, Java, MySQL and CouchDB

What are the most obvious drawbacks to this idea for an enterprise(ish) model using the following technologies. Browser based and native developed GUI using Delphi to connect to Datasnap server ...
4
votes
1answer
681 views

DB schema for packaging products/services together under a single price/offer

I’m trying to “conceive” the business logic of this website that has many activities, that the users can build their “combo” and get discounts depending on their choices and how long they are willing ...
1
vote
1answer
6k views

What is the Best Collation for Use in MySQL Tables?

I'm curious what is considered the standard today for use as the Collation of MySQL Tables? I was told that Latin-1 was the best choice when I was beginning with MySQL, but came across this post from ...
0
votes
0answers
30 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 ...
1
vote
3answers
109 views

DB Schema design : single table with more columns vs multiple tables with fewer colomns

What would be better DB design for a social network website. A single table with more columns and less rows or multiple table with fewer columns but more rows. For example: User can post an update on ...
-1
votes
1answer
134 views

What can I use to distinguish a user chosen name from other identical names [closed]

I am writing a dating/social website using php and mysql. We want the users to select a name for themselves, but we don't want to make it unique. It is not going to be used for searching. It is ...
1
vote
2answers
404 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
votes
1answer
69 views

Should migrations modify data?

Imagine you have a table that has 5 columns, and you need to split this into two tables, because in your iterative process, your application has increased in complexity. Should migrations change the ...
1
vote
2answers
154 views

Making a safe PHP login system [duplicate]

I am making a php website that requires user login. It has a remember me function. I would like to ask if the following approach is safe ? User logs in with correct username and pass (and remember ...
1
vote
1answer
382 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 ...
1
vote
2answers
196 views

NoSQL or MySQL? [closed]

I'm developing an app that requires to save data that is not consistent across all rows. These database entries represent different kind of sport activities. Let's take an example: In football the ...
13
votes
2answers
49k views

Datetime vs Timestamp in MySQL and PHP in practice?

I am not sure how to specify my datatype as datetime or timestamp, I think I will need both of them but on the different events. My website sells products and services worldwide and also have an ...
1
vote
1answer
103 views

Multiple MySQL update calls per second, can some of them be “missed”?

I have simple question, I think its not that big of a deal, but I'd still like to ask it as its boggling my mind for past 2 days a lot. What if I have a poll where instead of inserting answers to ...
0
votes
0answers
21 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 ...
15
votes
3answers
10k views

Is there any reason to use varchar over text columns in a database?

Is varchar just a remnant from before text came around, or are there use cases where you would want to use a varchar? (Or char for that matter..) (I use Postgres and MySQL (MyISAM) daily, so those ...
1
vote
3answers
176 views

Auto-save user input - the smartest way?

I'm developing a social network website and I'm working with php/mysql/jquery and I want users to have the most user-friendly website experience. That's why I try to avoid a save (submit) button at ...
6
votes
3answers
330 views

Do common relational database systems work 'out of the box'? [closed]

I'm quite new to software development and whenever I come across small projects which involve storing (relational) data I always ask myself if something like a micro-blog (or any other project with ...
7
votes
3answers
1k views

How to separate sensitive data in database(MySql)

I need to design a database that will contains information about personal disease of users. What can be the approach in order to implement the columns of the DB's tables: encrypt the information, ...
12
votes
7answers
566 views

500 databases or 1 database with 500 tables or just 1 table with all the records? [duplicate]

I currently have an application that is used by a single end customer. For ease of discussion assume the application only needs a single database table for all records. I now need to support ...
4
votes
1answer
276 views

Social network notification system

Background I am working on an app for a client that includes some social networking features. I was originally developing the mobile front-end, but circumstances have left me in charge of developing ...
1
vote
0answers
425 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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votes
4answers
3k 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 ...
-3
votes
1answer
205 views

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

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
votes
0answers
16 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 ...
3
votes
4answers
194 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
vote
1answer
175 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
127 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
115 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 ...
2
votes
2answers
839 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
356 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
86 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 ...