php mysql insert into table with foreign key

In this article, we will learn how to use a basic abstract class in PHP 5 to update data in two InnoDB tables using foreign key constraints. The following example shows how to use the foreign key constraint in the script language on the server. I.

Set MySQL data table primary key: Use the "PRIMARY key" keyword to create a primary key data column. The primary key column is set to not allow duplicate values, in many cases combined with "auto_increment" incrementing numbers. As shown in the

We all know that MySQL's reference integrity is generally applied through the specific use of the MySQL foreign key (foreignkey. In general, the popular open-source RDBMSMySQL (the best combination with PHP) does not support foreign keys because

People who have developed database-driven small web applications with MySQL know that creating, retrieving, updating, and deleting tables for relational databases is a simpler process. In theory, as long as you have the most common use of SQL

How to insert records into word tables with foreign key constraints? I have created two tables in mysql. Mysql> describe room; + -------- + ---------- + ------ + ----- + --------- + ------- + | Field | Type | Null | Key | Default | Extra | + --------

This article mainly introduces the difference and connection between the primary key and the foreign key in MySQL. it is the basic knowledge in MySQL beginners. if you need it, you can refer to the relationship between the primary key and the

Anyone who has developed a database-driven small web application using MySQL knows that creating, retrieving, updating, and deleting tables in a relational database is a simple process. In theory, as long as you have mastered the usage of the most

How to insert records into word tables with foreign key constraints? I created two tables in mysql: mysql & gt; describeroom; + -------- + ---------- + ------ + ----- + --------- + ------- + | Field | Type | Null | Key | Default | Extra | + --------

How to insert records into word tables with foreign key constraints? I created two tables in mysql: mysql & gt; describeroom; + -------- + ---------- + ------ + ----- + --------- + ------- + | Field | Type | how to insert records into word tables

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the