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Practical mysql database connection class

Database operation class

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Practical mysql database connection class A PHP and MySQL database connection file code. If you are looking for code with such functions, you can come in and take a look. It is a very complete file for everyone to learn and refer to.. Display how many tables there are, how many databases there are, Delete database: return deletion results .

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Solve database connection problem: a practical case of using minii/db library

18 Apr 2025

I encountered a tricky problem when developing a small application: the need to quickly integrate a lightweight database operation library. After trying multiple libraries, I found that they either have too much functionality or are not very compatible. Eventually, I found minii/db, a simplified version based on Yii2 that solved my problem perfectly.

Solve the problem that the database is not selected after the JDBC connection MySQL is automatically reconnected

12 Aug 2025

This article discusses the root cause of the "No database selected" error when JDBC connects to MySQL because the autoReconnect property and the connection URL do not specify the database name, resulting in a long-term operation. The working principle of the automatic reconnect mechanism is analyzed in detail, and two solutions are provided: it is recommended to always include the database name in the connection URL, and to utilize the createDatabaseIfNotExist property if needed. It aims to help developers build more stable and reliable database connections.

Working with Databases in WordPress

15 Feb 2025

WordPress database interaction guide: mastering wpdb class and database operation skills WordPress comes with a large number of database interaction functions. WP_Query class and wp_insert_post, update_post_meta, get_posts and other functions are usually enough to deal with most situations. However, especially when dealing with custom tables, we sometimes need to do things that cannot be achieved by WordPress native features. This tutorial will explore the most important class in WordPress database interaction - wpdb, and share some development tips. We will introduce the dbDelta function used to create custom tables, but will not cover creating initial Word