Questions tagged [mysql]

MySQL is an open-source, relational database management system. If your PHP code uses MySQLi, use the MySQLi tag instead.

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29 views

Retrieving information about a vendor using MySQL

I am loading some information about the selected vendor using mysql query. I made a method with a List as return type, then created another method to assign values coming from a list. I am wondering ...
4
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1answer
113 views

Blackjack game with database

This is the latest version of my Blackjack game and I did a quite big update to it. Now you can make an account that is saved in the MySQL database and you can bet money that are also saved in the ...
4
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1answer
101 views

Registration and login script

This is a registration and login script I have made in Python 3. It uses a MySQL database. In the future I might use it with my Blackjack game and add a row called ...
3
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2answers
309 views

PHP Secure Login Scripts

I have created this login script for a website I'm making; basically I want to make it as secure as possible, but also I want it to keep users logged in for 30 minutes. For example if I've logged in ...
5
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2answers
135 views

Web scraper for football data with three very similar methods

Application Logic I wrote a web scraper that store some football data inside my database. Those data need to be update if 7 days are passed since the last update. I have three types of record: Team ...
1
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0answers
59 views

Writing SQL queries to retrieve data from given tables

Good day, I am a college student and lately we had an assignment where we were tasked to write SQL commands on various questions depending on the information that is needed to be displayed from 3 ...
8
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2answers
137 views

Non-Entity framework database interaction model

A C# WPF user interface has been developed for the Book Inventory MySQL database previously shown in this question. Since the database had already been developed this was a database first ...
2
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0answers
28 views

Insert data from one table to another (million+ rows)

I have a procedure that collects data from one table and inserts it into another table with the same columns, but after correlating with a few other tables. Since the existing table (from which data ...
2
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1answer
63 views

Optimize Multiple Insert SQLite Coming From MySQL

I'm currently developing an app that requires sending and receiving of data from android studio going to MySQL and then data coming from MySQL will be saved from the SQLite. I need advice on how to ...
3
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1answer
78 views

Sending and receiving of JSON data to and from Android Studio

I'm currently developing an app that requires sending and receiving of data from android studio going to MySQL and then data coming from MySQL will be saved from the SQLite. I need advice on how to ...
1
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0answers
94 views

Consumer Producer problem solution using JDBI, MySQL, HikariCP

The app suppose to solve a subset of Producer–consumer problem. One producer, one consumer thread and buffer. The idea of the app to handle correctly database downtimes. The solution is to keep ...
3
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0answers
68 views

MySQL JSON diff procedure

I'm building a procedure which compares two JSON objects and return two JSON objects with differences between each (compared keys and values). But I have relatively superficial SQL knowledge, so I ...
1
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1answer
166 views

Using encryption/hashing to create a secure login

I am creating a login for an encrypted chat application which retrieves login information from a MySQL database. I have got to the point where I feel pretty confident that (to the best of my knowledge)...
1
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1answer
68 views

User registration and authentication using hashed passwords

I'm working on a game project (with Unity) that shall handle user credentials and other data. The game connects send requests to a php script and this script send requests to the database. After ...
3
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1answer
62 views

Bash script to backup a LAMP server

I wrote a bash script for backing up my LAMP server. To be honest that's my first experience in bash so I want to ask you for help in its improvement. ...
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2answers
54 views

Improving/ Optimizing Performance Query in MySQL PHP

I have invoices, invoices_items, order, order_items. <...
2
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1answer
375 views

Multiple database connections class

This is my database connection class in order to handle multiple connections with the use of context managers. Brief explanation: The __init__ method reads ...
1
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1answer
201 views

PDO login script

Just started using PDO for my newest project. I'd like to get input on how this login script looks and if I should alter it in any way. When the user clicks the link to the index.php page, a script ...
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0answers
7 views

MySQL insert record to one table to another if postid is not exist

Is there any way to write this query in a better way than this if I want to insert postid from posts table to ...
1
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1answer
64 views

Authentication using express-session

I'm making an online shopping store or e-commerce and I use an express session for many things. Example: Shopping Cart, Authentication user* I store the data chart list in the database based on the ...
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0answers
17 views

Window function in MySQL 8

I'm running the following query on my database: ...
1
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2answers
212 views

Simple wrapper for PHP mysqli connection

I'm creating some web apis to sync some data between desktop/mobile apps. Working on it, I wrote a simple wrapper for mysqli connection to simplify querying like: <...
3
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1answer
97 views

Authentication system (no browser) with mail verification

I made an authentication system for my software (no browser is used) that works like this: User receives a Key on it's mail after buying the software User registers account using that key and inputs ...
0
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0answers
362 views

Doctrine Query with subquery

I'm wondering if this is the right way to have a subquery in Doctrine. I have two entities, one called User and one called Log. ...
2
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0answers
86 views

Python graphene-graphql, are global constants for SQL queries a good idea?

For python 3.6.5 using graphene-graphql and mysql-connector Context: I wrote an API using graphene, a python graphQL implementation, this is actually my first time using the graphQL specification so ...
3
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3answers
243 views

Adding / updating user info into MySQL database

I'm working on an app that will be used for employee management and I'm using MySQL for the database. You can add employees, view/update/delete them, and on the dashboard I'm listing them in different ...
2
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0answers
3k views

MySQL database schema for e-commerce website

I'm making an e-commerce site, using MySQL for storing data. ...
0
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1answer
36 views

Get chat message data from table, grouped by date

Giving the following table: ...
1
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1answer
77 views

My Python 3.6 script to detect stamp card redeem fraud and prepare a csv report

I have a requirement to write a Python 3.6 script which should be able to detect following case within a time period and be able to create a text file report that lists the condition violated and ...
3
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1answer
444 views

PHP code to insert phone number and IP address into a table if not already present

I am currently coding a PHP script that connects to a database and inserts a phone number and IP address if either item is not present in the table. I believe I have completed it and it is working but ...
3
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0answers
565 views

Generic Unit of Work implementation

I am implementing the unit of work pattern to be used in the logic layer of my application. The goal is to abstract away the tasks of managing transactions / connections. My implementation relies ...
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1answer
68 views

Getting data from REST API (JSON), extract variables and upload those to database using MySQL [closed]

I'm working with a REST API, first time doing this and I have a working code but it's long and just looks messy to me. I just know there's a better and faster way to do it. ...
1
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1answer
98 views

Edit database content with a web page

I'm new to PDO, and I want to make sure I made this in the correct way. This way is working, but I have a feeling it's unclean. I have this input: ...
2
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4answers
995 views

using $_POST array to prepare PDO statement with variables

I have been developing a little, private Blog Site to make notes/ stories of pen and paper rpg games available for me and my players. This is my first project. As I am new to coding in PHP and MySQL ...
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1answer
54 views

Performance for creating millions of database entries

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1
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1answer
73 views

Auto generate database table

I have written my own little auto-generated table class, and I was wondering if you guys can give me some tips on how to make this code more elegant and secure and maybe compact it so I use only one ...
4
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0answers
275 views

Automatically generate TypeScript classes from database tables

Made a project to generate TypeScript classes from database tables, and I'm looking for input if the code is reasonable. pg and ...
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1answer
91 views

How to write SQL in a industry standard style [closed]

Here are the commands I ran to start setting up a database I need. ...
1
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3answers
189 views

PHP script security for new user registration

I would like to ask the experts here if this is secure. If it is not can I get an explanation as to why it would not be secure? I have been reading off and on on sites for this and I have trouble ...
2
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1answer
701 views

Scrape data from a webpage and store them in a database

I've written a script in python to parse different names ,bubbles and reviews of various ...
1
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1answer
44 views

Calculating COUNT(*) of a MAX() + GROUP BY query

I have a SELECT query I'm executing which has a MAX() column and a GROUP BY clause, and in ...
1
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2answers
63 views

Merge both sql queries into one to get the performance

Currently i am using 2 queries - one for reattemptdate & one for holddate.... if we merge both queries & get the results in single query , than will it give better performance? if so how to ...
0
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2answers
75 views

Tracking employee data

We have hundreds of employees and for tracking each employees' data, and I am using this code: ...
1
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0answers
37 views

Implementing an In-house Badminton Ranking System

I am working on a project and wanted to have a quick look by you people if the schema or query needs some changes or does it totally needs to be changed. The project is about creating a ranking ...
2
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0answers
69 views

One class for MySQL and MSSQL Queries

EDIT BELOW I am trying to create resusable classes for MSSQL and MySQL queries (later also Update and Delete queries). I tried it doing the OOP-way. Here is my result: Einstellungen.vb: ...
1
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1answer
136 views

MySQLConnection Conn.Connect()

I'm pretty new to working with databases, and I would like to know if I've made some common, major design flaws in my implementation. For context, the whole project is intended to be used by a single ...
-3
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1answer
54 views

Is there a different way of implementing this program without using nested while loop? [closed]

Presently my program is working properly, but how do i implement this program without using nested while loop(one while loop within another while loop).This is a kids way of programming and my office ...
2
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0answers
58 views

Exporting tables from 30 databases

What my code do: Connecting to 30 DB (consistently) Copying DB file to temp.dat Reading temp.dat Writing read data to file So, it connects 30 times with different databases. This take 6-7 second (...
3
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2answers
1k views

Using Python to create a JSON file of recipes from MySQL

I needed to create a JSON file from a couple of MySQL tables to migrate some recipes from wordpress. This was my first time writing a script in python and would like to get some feedback on what I ...
1
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2answers
144 views

Encoding multiple rows from prepared statement in php [closed]

I have this code that hypothetically returns multiple rows from a database and encodes them in a JSON. I am wondering if this is the best and most presentable way to do it. Note: I am using msqli ...