define delete key

Table of Contents  Creating a MySQL foreign key MySQL foreign key support in database engines MySQL foreign keys and on UPDATE and on DELETE MySQL foreign Key Faq:how do I define a foreign key in MySQL?Answer:here ' s A quick

Oracle FOREIGN KEY (Foreign key) cascade Delete (delete CASCADE)TargetExamples of how to use cascading deletions in Oracle foreign keysWhat is cascading delete (DELETECASCADE)? Cascade Delete is when a record in the primary table (parent table) is

Create TriggerCourse_delete onCourseinstead of Delete as Declare @cno varchar( -)--Defining Variables Select @cno =Cno fromDeleted--the information in the temp table is instead of substitution delete information to delete Delete

Assume that a computer manufacturer stores the product information of the whole machine and accessories in its database. The table used to save the product information of the entire machine is called pc; the table used to save the accessory supply

Access2000 quick tutorial-1.6 define "primary key" Access2000 quick tutorial-1.6 define "primary key" The sixth definition of "primary key" can be used to create a large data database in Chinese Access 2000. Instead, the data distributed in

The definition of "primary key" in Chinese Access 2000, a large data base can be built, and to use the data distributed in different tables as a "library", it is necessary to establish a "primary key" for each table to establish a relational

MySQL foreign key details, MySQL key details Recently, when I was studying Hibernate, I was always confused by foreign keys. Moreover, my MySQL foreign key learning is not very solid, so in order to better master Hibernate and MySQL, therefore, I

What are the differences among KEY, primary key, unique key, and INDEX in MySQL? mysqlunique You can split the questions raised in the questions to solve them step by step. In MySQL, KEY and INDEX are synonymous. This problem can be simplified to

Recently in learning Hibernate, always by the foreign key to make a brain, and, their own MySQL foreign key learning is not very solid, so in order to better master hibernate, MySQL, so, in the online search some learning MySQL to build foreign keys

VC (visual_c++) virtual key VK Value list keyboard VK key value list/* Virtual keys, Standard set*/Vk_lbutton             &NBS P                        0x01 Vk_rbutton       &N Bsp                             0x02 vk_cancel   &N Bsp