MySQL is an open-source, relational database management system.
-3
votes
0answers
39 views
Database credentials inside of Java App
I am toying with the idea of storing data from a Java application into a MySQL database. However, I am concerned that someone could recompile my application and gain access to the database. Am I ...
0
votes
2answers
52 views
Should object enforce validation rules on read as well as write?
I have a class that enforces database-friendly formatting for some of its properties in the __construct() method.
This guarantees that if a new object is created and saved, it will be saved ...
-5
votes
0answers
25 views
When should I use adjacency list model and nested sets? [on hold]
I'm going to create an online store, and I'm misunderstanding with my database.
1/ when should I use adjacency list model?
2/ when should I use nested sets?
Nested Sets algorithm is very new for me! ...
4
votes
2answers
84 views
Database design, processor vs inconsistency
I was wondering, if I have a table that stores, lets say, a user's transactions, then when I need to fetch the user's current balance I would have to go and use SUM() like SELECT SUM(value) FROM ...
-1
votes
2answers
63 views
Can I start a search after a certain number of rows in MySQL
I am thinking of a case where I have to find, say, an article with a title given as input by user. All my articles are stored in db and somehow I know that the requested article is after n rows. There ...
-2
votes
1answer
50 views
How to compare Sql datetime field with date field [closed]
I have datetime type column in sql tablename id createdand i get date from input date type html tag I want to compare in sql query where close condition. How to compare both field.
var startDate = ...
2
votes
1answer
55 views
Getting posts from users that are being followed: two different implementations
I have two different implementations for retrieving posts from the users someone is following and I want to know which one you would recommend using. First I'l show you the tables, and then the two ...
0
votes
1answer
93 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 ...
1
vote
3answers
77 views
Multiple items in a single column SQL
I'm creating a charter database structure. I'm trying to figure something out, I have read on here that databases should be normalized. Now, I'm a bit confused on this because I believe I have ...
1
vote
2answers
98 views
Are there downsides to not explicitly defining database relationships?
I have a PHP application with a MySQL database. I have not defined any formal relationships between tables. (eg. Set Foreign key, etc). Although in every query (CRUD) I always consider the relation ...
3
votes
3answers
118 views
How to test data based on SQL queries?
I'm trying to set up a test framework for (SQL) datasets that get updated daily. I want to write assertions that involve comparisons between two tables–for example, the sum of column visitors in the ...
3
votes
3answers
150 views
When dealing with tens of billions of rows in a web app table, would a NoSQL database be noticeably faster than a relational one? [closed]
I'm currently designing a conceptual web app, where users can submit posts, comments, and "like"/"dislike" both of those. However, I am not sure of how to store the (dis)likes, because of how many ...
1
vote
1answer
159 views
Which is better to call: API or Database?
I'm building a web app that hits up some APIs to get JSON dumps of data. I'm running across a problem. I can either grab all the data, dump it into a DB, then pull it from the DB as needed. OR I can ...
9
votes
2answers
297 views
Benefits of Structured Logging vs basic logging
We're building a new app and I'd like to include structured logging. My ideal setup would be something like Serilog for our C# code, and Bunyan for our JS. These would feed into fluentd and then could ...
0
votes
1answer
80 views
Generate id in application or use database generated one?
I am writing a small app that manages a couple of recipes. I have a MySQL database that is used by my data persistance layer. I need some kind of id in my business objects representing the recipes to ...
1
vote
2answers
140 views
How to sync the data from the same user across multiple devices
I'm working on a small fitness app in which the user (whom is authenticated with the a server) could create their own workout plan which will be synced with a server.
The problem with this is that ...
0
votes
1answer
91 views
Saving an image in MYSQL vs saving to a folder [duplicate]
Is there an advantage to either method and/or a risk to either? Looking to upload JPG or PNG files only with a size limit of ~3mb with reduction done before insertion.
0
votes
0answers
17 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
...
-1
votes
1answer
52 views
Querying Results from End of the table
Normal behavior of the SQL Table is to add new rows in end of the table. I want to query results of single row only.
So mysql command is
SELECT id FROM users WHERE country='india' LIMIT 1
this ...
4
votes
0answers
79 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.
...
-4
votes
1answer
66 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 ...
0
votes
1answer
71 views
Replace use of ComboBox with user controls
In currently developing a project where I'm going to use a lot of combobox, in order to avoid repeating a lot of code I'm planning on building a user control containing a ComboBox that retrieve the ...
1
vote
1answer
82 views
How to handle file uploads express (UUID / location)
I am building a community website with a NodeJS express backend and a mysql database. Now I am up to the point where I want to store profile pictures of users and pictures related to specfic ...
7
votes
0answers
121 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 ...
0
votes
1answer
98 views
What is the significance of database host name while configuring database?
The name database host, how the name indicates "the server that hosts the database", should be the server ip, that hosts that database. I don't see any relation of it with the scripts that try to ...
3
votes
1answer
126 views
How do large corporations store API keys?
When FaceBook or Google give me an API key, are they just storing it in a database?
Unlike a password, where you can hash and salt it before putting it in the database, it seems to me that a key ...
2
votes
2answers
135 views
Best approach to develop php mysql project with multiple developers
We are 4 developers working on a PHP-mySQL web project. Currently we work together as described below:
All project files except DB is hosted at GitHub
All project files except DB is hosted at GitHub
...
1
vote
0answers
37 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 ...
1
vote
1answer
118 views
Best Multiple tables product with categories
I was looking to create an EAV structure for an inventory management system. But I read this answer and decided against it. I am looking to create multiple tables for all my products. But the trouble ...
0
votes
0answers
41 views
Compute geographic areas Laravel
I am developing a backend for a taxi app in Laravel 5.
Up to now, served areas are defined by the admins but I would like to change the way it works.
I would like each taxi driver to define their ...
2
votes
1answer
186 views
Conflict resolution for two-way sync offline sync
How do you manage two-way synchronization between a 'main' database server and many 'secondary' servers, in particular conflict resolution, assuming a connection is not always available(offline ...
0
votes
2answers
354 views
Shopping cart in PHP : Sessions or Database? [closed]
I am currently developing a simple shopping cart using PHP & HTML.
I've been having troubles with using the SESSIONS in Php like:
Sessions not continuing when I switch pages even though I ...
0
votes
1answer
33 views
MySQL: Application Table Design
I'm creating a new site which will have many objects, such as posts(text/photo/video), products, photo galleries, etc.
Currently my design is to put all of the objects into a posts table, but I'm ...
0
votes
4answers
134 views
How to avoid null in primary key? [closed]
I need to make table that seems to require two column primary key with one of the columns nullable.
But according to questions I read on Stack Overflow that is undesirable and even against SQL ...
1
vote
4answers
250 views
How to deal with long running transactions?
I'm developing a Content Management System (CMS) and I would like to include a "Save Changes" button. I mean: a user performs several changes in the database, but those changes are still not ...
0
votes
1answer
247 views
Tracking hours with clock in/out
I am working on a web interface that would allow the user to keep track of the amount of time people spend at their establishment.
The problem:
I don't know what the best way to keep track of this ...
3
votes
2answers
311 views
Roles and permissions: a good approach in defining permissions?
My application has users and administrators. The administrators split into two: super-admin and limited-admin. The super gets all permissions while the limited can be configured to inherit just the ...
1
vote
1answer
190 views
Synchronize database with external API
I currently own a website where players can look-up their statistics of a game. When someone that is not in my database yet requests their statistics, I am calling the API with a PHP cURL request and ...
0
votes
1answer
126 views
PHP MySQL unique user data [closed]
I'm trying to create a php website that users log into and they can submit data to a MySQL database. How do I make it so the users can only see data they've submitted and not everyone else's data?
...
4
votes
0answers
103 views
RDBMS v/s NoSQL for analytics [closed]
While reading about this topic online I have found out that, in general, RDBMS are good for read heavy loads and NoSQL databases are good for write heavy workloads. This statement also seemed true ...
3
votes
1answer
164 views
How do SQL transactions return immediate results?
I am using transactions to do bulk insert/updates. This is my little test loop:
$now = date('Y-m-d H:i:s');
for ($i=0; $i<60; $i++) {
$db->insert($cfg['ps_manufacturer'], array(
...
0
votes
3answers
323 views
Why does databases use text? [closed]
This might be a little dumb question but why do we save text in the db instead of something smaller?
Couldn't there be some other way to store data in the db like in a compressed form, and then have ...
0
votes
1answer
176 views
What is the problem will happen if I create auto generate ID without using mysql auto increase of mysql table by my self?
I would like to ask you a question about MySQL AUTO_INCREMENT.
I already created my own function to generate AUTO_INCREMENT when the user inserts any data input a table in MySQL. This function works ...
2
votes
2answers
499 views
matching usernames with their password
We are working on a simple login/registration form. Our login script checks to see if the username and password exist in the same row of the database. If it does exist, we bring the user to a welcome ...
1
vote
1answer
100 views
How to handle the default time when user is selecting dates to filter on?
We have an ASP.NET application which allows users to report on their data. We have a number of reports that the user selects the start and end date from a datepicker and then we returned the filtered ...
1
vote
3answers
410 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 ...
0
votes
3answers
2k views
Is it bad to store data in JSON form or should I use mySQL? [closed]
I've been building an application and the whole thing is built around a simple data storage system.
Create an array.
Convert it into JSON.
Add <?php die() at the beginning to prevent access.
...
3
votes
1answer
60 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 ...
0
votes
1answer
149 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 ...
1
vote
5answers
2k 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 ...
