Questions tagged [mysql]
MySQL is an open-source, relational database management system. If your PHP code uses MySQLi, use the MySQLi tag instead.
1,089 questions
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Cmake build system for prototype planner software using boost and other previously written code
I'm prototyping/debugging some C++ code that I may turn into a longtime project. The build system is ready for review, the prototype is not.
The GitHub repository for the code listed below.
Like all ...
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Weather Observation Station 8 query
Here's my (correct) solution to a HackerRank question:
Weather Observation Station 8
Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last ...
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A function that returns correct number of inserted, updated and skipped rows for INSERT or UPDATE query
When MySQL executes a Data Modification Query, it provides some additional info on the outcome, which is usually displayed in the console. This info is also being exposed through MySQL C API and this ...
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Slow SQL query with nested subquery
I have written the below query in order to identify how many events (occur over a week) in each hour.
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Improving upon the Security of my Export Remote Database to Local PHP API
I am working on an in-house application, and I am working on how our application communicates with our remote server.
I have a PHP script that acts as an API to call to our MySQL DB and dump its ...
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Program for an employee database using python
In this program I'm defining functions to perform different tasks on a data record book for employees.
Here is a summary of the code:
Intro() to make the presentation of the home page.
create_record()...
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Connection pool design for Boost MySQL
I had to design a connection pool that handles Boost MySQL connection to use the asynchronous functions.
Here is the code:
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Faster Query to Track State changes in a Large Table
I have a table that tracks state changes of an entity with timestamps. The schema of the table is as follows:
entityid
userid
originalvalue
newvalue
changetime
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2023-11-28 12:10:...
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Evaluating Extended Operating Hours Past Midnight Across Timezones in PHP
I am working on a project that involves tracking the operating hours of businesses across different timezones. Some of these businesses operate past midnight, and to accommodate this, operating hours ...
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A simple PHP login form with PDO
I wrote a simple PHP login form for a website. It has an initialization script, as well as a form to allow a user to login, plus a link to log the user out after logging in.
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Consuming sharded database using node.js
I think the only big improvement that can be made is to check which shard to query based on the userIds of the followed users. One easy way is to check the last ...
user225166
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SQL query creating tables needed by a simple PHP CMS
I have written recently the SQL query to MariaDB that I want to move into PHP code. Below is my test.sql file. What do you think about my SQL code?
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delete rows based on references to other tables in a mysql database?
I have a database with the following hierarchy.
A dataset can have multiple scans (foreign key scan.id_dataset -> dataset.id)
A scan can have multiple labels (<...
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mySQL adjacency list model : Always retrieve parent and children/siblings
I’m using mySQL to create and adjacency list model type of table. I have only one level, that is a parent with children, like this:
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