How-to articles, tricks, and solutions about MYSQL
This error message indicates that the client was unable to connect to the MySQL server.
You can use the IN operator to select rows where the value is in an array.
To check if a given username and password match those stored in a MySQL database, you can use a SQL SELECT statement with a WHERE clause.
There could be a number of reasons why your MySQL database isn't starting in XAMPP on macOS.
The Haversine formula is a mathematical formula that can be used to calculate the great-circle distance between two points on a sphere, such as the Earth.
If you are using MySQL JDBC Driver version 5.1.33 and you are experiencing issues with time zones, there are a few things you can try:
If your MySQL password has expired and you can't connect, you will need to reset the password.
To get the column names of a table in MySQL, you can use the SHOW COLUMNS FROM command.
The "MySQL server has gone away" error message typically indicates that the connection to the MySQL server was lost.
It looks like you are trying to use a function from the MySQL extension in PHP, but you are getting an error saying that the first parameter should be a resource.
mysqli and PDO are both PHP extensions used for interacting with databases.
This error message is typically encountered when an attempt to execute a MySQLi query has failed.
To pass an array to a WHERE clause in PHP, you can use the implode function to join the array elements with a comma separator and use them in your WHERE clause.
To get the last inserted ID using PDO, you can use the PDO::lastInsertId() method after inserting a row into the database.
To insert data into a database using PDO and prepared statements, you can use the following steps:
The error message "SQLSTATE[HY000] [2002] Connection refused" typically indicates that the client was unable to establish a connection to the database server.
The isset() function in PHP can take multiple parameters, and it will return TRUE if all of the variables passed to it have been set, and FALSE if any of them have not.
To insert a new record into a MySQL table that has an auto-increment primary key, you can use the INSERT statement with a list of comma-separated values.
You can use the ON DUPLICATE KEY UPDATE statement in your MySQL query when using PHP's mysqli or PDO libraries to accomplish this.
To insert a row into a MySQL database table and get the id of the inserted row in PHP, you can use the mysqli_insert_id() function.
The password for accessing phpMyAdmin and the password for connecting to the MySQL server using the mysql_connect() function can be different.
PHPExcel is a library for working with Microsoft Excel files in PHP.
phpMyAdmin is a web-based tool for managing MySQL and MariaDB databases.
You can use the PHP MySQLi extension to connect to a MySQL database and retrieve the data from a table to populate a drop-down box.