Category Archive for "Mysql"

How can I prevent SQL injection in PHP?

SQL injection is a type of security vulnerability that occurs when an attacker is able to manipulate an SQL query, often by inputting malicious code through user input. This can le...

Why shouldn't I use mysql_* functions in PHP?

MySQL has been a popular choice for database management in PHP for a long time. However, the use of mysql_* functions in PHP has been deprecated since P...

When to Use Single Quotes, Double Quotes, and Backticks in MySQL

When writing queries in MySQL, it's important to understand when to use single quotes ('), double quotes ("), and backticks (`) and how they affect the behavior of the query. In th...

SQL injection that gets around mysql_real_escape_string()

SQL injection is a common security vulnerability where an attacker can manipulate SQL queries by inserting malicious code. It can allow unauthorized access to a database, modify da...

SQL Select Only Rows with Max Value on a Column

In this article, we will discuss how to select only the rows with the maximum value on a column in a SQL database. This problem is commonly encountered when dealing with tables tha...

Can I mix MySQL APIs in PHP?

The use of different MySQL APIs in PHP can sometimes be confusing, especially when it comes to connecting to the database and closing the connection properly. In this article, we w...

Syntax error due to using a reserved word as a table or column name in MySQL

The Issue When executing a MySQL query, you may encounter a syntax error related to using a reserved word as either a table or column name. This error occurs because MySQL treats...

How can I return pivot table output in MySQL?

Are you looking for a way to transform your MySQL table into a pivot table, where the rows become columns and the values are aggregated based on certain criteria? If so, you're in...

Retrieving the Last Record in Each Group - MySQL

When working with MySQL, there are often situations where we need to retrieve the last record in each group based on a certain criteria. This can be a challenging task, but there a...

Connect Java to a MySQL Database: A Comprehensive Guide

In today's digital world, the need for efficient and secure data storage and retrieval is paramount. One popular choice for managing data is a MySQL database. If you'...