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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15 views

Executing Queries within a while loop

I would like to hear your comments on the following piece of code in PHP. This code is supposed to be running for 25 seconds per request until a record is found to get new notifications. If it's a ...
1
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0answers
63 views

Printing nested arrays

My database: Class: ...
2
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1answer
111 views

PDO Is this registration secure and well coded?

i finally have been moved to PDO (from MySQLi) and i m now trying to make simple login and registration page (for training purposes). This code does work! But i want to know if it is secure? Also ...
1
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1answer
57 views

Categorize & sub categorize from contents of one row and more execute even more queries in results

I have a table called sales and it has below columns: 'id' 'product_type' 'soldDate' 'text' ...
4
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2answers
81 views

Query to plot a histogram of song ratings

I wrote code to plot a rating distribution, which looks like this: The most important function is the stats function: ...
4
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1answer
62 views

Periodically synching data from an API to database is extremely slow

I have a scheduled task where I synch all the data from one table (via an API) to another. There are about 10,000 rows that are being updated and the new ones get created. This is what I came up with ...
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0answers
27 views

Listing all related details of a model object through Django ORM

How can my solution be improved / optimized? explaination of db models : thinkpad is a equipment of laptop subcategory.and ...
5
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4answers
83 views

PDO MySQL queries for web application to reserve a vehicle

I normally use MySQLi and this is my first time trying out PDO. I am doing this because this is my first web application that is going to be used by the public, hence I want it to be secure. The code ...
-2
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1answer
26 views

Find items in 3 or less levels CASE WHEN [closed]

I have this code where I want to go trough 3 levels and it doesn't seem to work if there are only 2 or 1 levels! What's wrong with my query? ...
2
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0answers
25 views

PySide2 Row and Column Creator

In short, I need help simplifying and optimizing this code because now that I have switched to a tree widget from 2 list widgets, loading the tables has increased by roughly 3-4 seconds (used to be ...
1
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1answer
72 views

Connect to database, handling errors

I try to handle or catch possible errors with PHP/MySQL for security reasons and would like to know if I'm doing it right. The first case, connection: I use it as a function and call it always when ...
1
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1answer
59 views

Code improvement suggestions for cost calculation [closed]

I have to calculate costs based on country code and city(optional). There is also a condition that countries in Asia have separate pricing logic depending on both country and city and they are stored ...
7
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1answer
60 views

Database design for a very basic image-sharing social website

Below is the database design that I created for a basic image sharing social website. When a user signup his username, email, password save in users When the user ...
3
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1answer
38 views

Import Excel sheet into MySQL

This is the first project I have coded using Python. Therefore, I am looking for someone to give me some comments to further improve my code. Purpose of the application This application help the ...
1
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1answer
62 views

Simple CRUD back-end for an inventory-tracking web API

This is the simple back-end, albeit crude, that I made for a React Native mobile app project as a proof of concept. It's a basic CRUD for tracking supply inventory. The "shopping list" is items with a ...
6
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1answer
75 views

All-core MediaWiki website upgrade script

I wrote the following Bash script to upgrade All-core MediaWiki websites (no added extensions/skins or images - besides logo image). I already tested the essence of this script and it worked for me; ...
5
votes
4answers
211 views

Java methods to add and authenticate users in MySQL

I'm going through some code and trying to figure out how to get rid of duplicates from the following two methods. Both methods execute a simple login/register query to a local MySQL DB. I couldnt ...
1
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1answer
38 views

Create, populate, and query a basic five table car dealership database

The objective is to implement basic mySQL and relational principles, like how to handle and query one-to-many and many-to-many relationships. The database consists of 5 tables: car (car_id, ...
2
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1answer
82 views

PHP santization of textarea input

My application will accept textarea content that is submitted by a user, and i would like some people to review my code to make sure there is no security vulnerability such as XSS. My mySQL column ...
1
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0answers
36 views

Optimizing Node MySQL Query for CPU Utilization

I am working on a NodeJS port listener code that listens to a particular TCP port on the server. The obtaining the data from the port, the data is split using a delimited (for instance comma ...
1
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1answer
56 views

Shoutbox system

I wrote a little Shoutbox System which is working fine, but I want to know if there is something I can improve about this code. Here is my Shoutbox Overlay: ...
3
votes
1answer
45 views

Building CanvasJS Graph Datapoints in PHP Loop (MySQL Backend)

The following code is one of a few similar snippets that generate a graph using CanvasJS, with the datapoints for the graph pushed to an array in PHP during a while loop. The code pulls the the date ...
2
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1answer
265 views

Python Tkinter login GUI with database

I created a simple login program that works how I wanted them to work. I separated the GUI and database codes into two different python files. I named the files as login.py and dbaseManip.py. The ...
0
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0answers
38 views

Python script to import MySQL tables to PostgreSQL

I'm using the below Python script to port few table data from a remote server (MySQL database) to my data warehouse server (PostgreSQL DB), The script is working fine (I'm using foreign data wrapper), ...
1
vote
1answer
45 views

Dynamically inserting html from external file and updating the database

I need some suggestions on how to approach this. I want to allow users to create sections of website. The code so far is working but since I am new to back-end I feel like there is better, more ...
2
votes
1answer
69 views

Join and pivot multiple tables of securities data in MySQL

I'm interested in a way to join three (or more) tables in a way that is more efficient (both in terms of conciseness of code and in terms of generating the results) than what I have currently. ...
4
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2answers
114 views
1
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1answer
24 views

MySQL GROUP BY id, then show name

I have a users table where some users have the same name: ...
1
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0answers
29 views

Stored procs fine tuning for processing bulk data - 5 million records

I have this procedure which is used for bulk upload data from a temporary table (temp_rules_master) into two other related tables. It has 5 million records. The ...
0
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1answer
19 views

Querying nearest city with a given shop using latitude and longitude is slow

I am using the following query to search for the nearest city to my location from the cities table using latitude and longitude. The query also checks whether the nearest cities to my location have ...
3
votes
1answer
26 views

Billing and recurrent payment db structure

I am designing my first payment service and here is my db structure. Each user can have many businesses, each business can have many products. Some are recurring, some are paid once. Each product is ...
6
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3answers
269 views

Single method for different parameterized mysql command

I currently have these two methods. One method returns all records, while the other one returns only a specific record. ...
3
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2answers
79 views

Elegant and secure way to create a dynamic query

I want to create a dynamic query to display: all the invoices if the user has moderator rank only his invoices if the user is a simple member code ...
0
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1answer
61 views

Register Script for a website [closed]

I'm still new in web development and I am trying to develop a website with free access to doctors listing with option of booking. This is a personal project that my local community can benefit. I ...
1
vote
1answer
57 views

Displaying a paginated list of forum topics using PHP PDO [closed]

Can someone tell me if this code is safe? Can be sql-injected or something else hacked? Code get some rows from db and show in pages with pagination... if i can improve let me know and show me how, ...
2
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0answers
20 views

Querying Aurora via Node.js

Function queries data from an Aurora database. Aurora database is the MySQL engine therefore, I'm querying it with a MySQL NPM module. If there is something better, I'm all ears. The calling function ...
2
votes
0answers
54 views

Make Pagination using Ajax with Jquery, PHP [closed]

This is the first time that I have add (I mean, I try) Ajax with Jquery to PHP and Mysql (pagination). This is a link to the test page: testpage1 I think everything works, but is it done correctly? ...
3
votes
1answer
50 views

Proper use of mysqli->close();

database.config.php ...
3
votes
1answer
30 views

Reviewing the Dockerfile and docker-compose.yml files for a basic nodejs mysql project

I'm new to docker and after much research and stufy I've created a sample application and would like it to be reviewed in case if I'm missing any corner or if there's redundant information that can be ...
4
votes
1answer
92 views

PHP Login Class - Security and Efficiency Check

I'm hoping someone would be able to identify if my code is prone to SQL injections, and just overall see if there is anything that could be done better, faster or more efficiently Im very new to OOP ...
2
votes
1answer
81 views

PDO library to handle MySQL queries

This is my library class. This does not have any issues but I want to know if I have any mistakes, or ways to improve performance: variable and call (example of ...
3
votes
2answers
104 views

Php registration form input is required validation

Ok, so I have been looking for resources on how to make a registration form work with input validation. I want the error message show up under the table of the registration form and not on top of the ...
5
votes
1answer
91 views

Lastest version of my Blackjack game

This is the latest version of my Blackjack game that uses a MySQL database to store user info. I did everything I was recommended in my previous post, added a ranking system and also fixed a bug where ...
1
vote
1answer
55 views

Search by parameters from multiple tables

I wrote a query that searches people based on search parameters from 3 other tables (phones, ...
0
votes
1answer
42 views

Saving row versions in MySQL [closed]

I just want to confirm that I am versioning my "versionable" fields correctly, and that there isn't another, better way to do this. I have a table event, a record ...
1
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0answers
25 views

performing SQL SELECT query inside the loop [closed]

I have a table leave_muster inside which I have to update all the records of the previous month on every start of the new month. My Code ...
0
votes
0answers
25 views

Ensuring referential integrity in child, group relationship

I'm not going to lie - Sql Server is not in the top 10 of my skill set, but it's something that I have to do from time to time. What's more, I'm using Entity Framework, so there is a workaround ...
2
votes
1answer
104 views

Create Apache2 virtualhost, Mysql db & user. CLI tool and GUI on top of it

Review for optimization, code standards, missed validation. What's in this version: Rewritten, instead of large complex script - few tools with each own task. Solid CLI tool and GUI script on top of ...
2
votes
1answer
124 views

PHP Mad Libs with OOP and SQL

I've been learning PHP and I've just gotten into using OOP. Classes/objects/methods etc. My end goal is to take an old Mad libs program I did with PHP, and convert it to OOP. The gist of the project ...
0
votes
0answers
16 views

Optimize slow SQL stored procedure that calculate Test Case failures in a non-optimal schema

I need to heavily optimize the following sql stored procedure (MySQL 5.6). Requirements: Should be as fast as possible (this is a key) Lots of records (10 M now, possibly more) Stored procedure ...