after insert

I. Use of security issues in UDF For example, execute an SQL statement to view the contents of the/etc/passwd file: The main use of the Load_file () function, of course, is that the function can be disabled. The above can easily see the/

0. Basic concepts of Triggersa trigger is a special stored procedure that triggers execution when inserting, deleting, or modifying data in a particular table, and it has a finer and more complex data control capability than the standard

Triggers using tutorials and naming conventionsDirectoryTriggers using tutorials and naming conventions 11, Trigger Introduction 12, trigger Example 23, trigger syntax and features 34, example one: row level trigger 145, example two: row level

TriggerScene:Log system, record what to do with student tables!The problem solved:1, to get each student record is modified the time, in order to issue the record log action!2, to perform a certain operation, you need to get the current record of

There are many security questions about mysql database Elevation of Privilege, such as remote Elevation of Privilege, root user Elevation of Privilege, and usage of UDF security issues. Let's take a look at these questions. I. Usage of UDF security

I. theory: 1. the trigger cannot use the dynamic SQL statement of call, you cannot directly return data to client 2. you cannot use statements to start or end a transaction in a trigger. 3. the trigger can only roll back the transaction in a table

The head pointer holds the number of linked list elements, the head node begins to hold the data, and the tail node points to nullList.h#ifndef _list_h#define_list_h#include#include#defineDEBUG 0typedefstructnode{intVal; structNode *Next;} Node;

A trigger is a code block automatically executed when a specific event occurs. It is similar to a stored procedure, but users cannot directly call them. Triggers are a technology provided by many relational database systems. In the ORACLE system,

　　1. A trigger is a special stored procedure. It cannot be explicitly called. Instead, it is automatically activated when a record is inserted, updated, or deleted into the table.Therefore, triggers can be used to implement complex integrity

One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. So triggers can be used to implement complex integrity

　　One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. so triggers can be used to implement complex integrity

The previous article is a relatively simple view, in fact, it is relatively simple to use, and later what more about the use of views, the time to add in their own. Next, let's look at the use of triggers!I. Overview OF triggers 　 1.1. What is a

Create:[SQL]View PlainCopy Create Trigger Trigger_name ON {table_name View_name} {for after Instead of } [ Insert, Update,delete] As Sql_statement To delete a trigger:[SQL]View PlainCopy Drop Trigger

One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. So triggers can be used to implement complex integrity

Trigger-related concepts and syntax Overview This blog post focuses on the following topics: What is a triggerApplication Scenarios for triggersSyntax for triggersTypes of TriggersCase Data: The concept of triggers and the first trigger A

First, Trigger 1. Triggers are stored as separate objects in the database, 2. Triggers do not need to be invoked, it is triggered by an event to run 3. Triggers cannot receive parameters --Application of Trigger For example: NET, net, Facebook,

1. Create the statement for the trigger: CREATE TRIGGER {before | After} {INSERT | UPDATE | DELETE} On For each ROW -Triggers The code is as follows Copy Code --create Trigger name --on Table name --Trigger

Triggers using tutorials and naming conventionsDirectoryTriggers using tutorials and naming conventions 11, Trigger Introduction 12, trigger Example 23, trigger syntax and features 34, example one: row level trigger 145, example two: row level

DB2 using version 9.7Create a, b two tables, a table data update, delete, insert, the A table ID record into the B table1. CREATE table A (ID varchar (5), name varchar (30));CREATE TABLE B (ID varchar (5), name varchar (30))2. Create a

Directory (?) [+] Transaction Commit or roll back Common transaction Directives Characteristics of the business acid Trigger Create a Trigger Manage triggers TransactionsCreateTable Swpu