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Assertions and Triggers

Assertions and Triggers

Assertions and Triggers. Rose-Hulman Institute of Technology Curt Clifton. Assertions. Like constraints: Recall: state IN {'IA', 'MN', 'WI', 'MI', 'IL'} But can reference all tables Defined by: CREATE ASSERTION <name> CHECK ( <condition> );. Example: Assertion.

By wood
(154 views)

Module 10: Implementing Triggers

Module 10: Implementing Triggers

Module 10: Implementing Triggers. Overview. Introducing Triggers Creating, Altering, and Dropping Triggers Working with Triggers Implementing Triggers. Lesson: Introducing Triggers. SQL Server Triggers What Are Triggers Used For? Sequence of Events and Restrictions. SQL Server Triggers.

By reya
(189 views)


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Triggers

Triggers

Triggers. How triggers work Creating triggers Using triggers to maintain referential integrity Multirow considerations Nesting triggers Rules associated with triggers Disabling triggers Dropping triggers Getting information about triggers. How Triggers Work.

By kineta (342 views)

TRIGGERS

TRIGGERS

TRIGGERS. WHY TRIGGERS ARE USEFUL. A trigger is a named database object that is associated with a table, and that activates when a particular event occurs for the table. Triggers in MySQL can be associated with “insert”, “update” and “delete” statements.

By vida (278 views)

Triggers

Triggers

Triggers. A trigger is a statement that is executed automatically by the system as a side effect of a modification to the database. To design a trigger mechanism, we must: Specify the conditions under which the trigger is to be executed.

By liesel (133 views)

Triggers

Triggers

Triggers. Database Management System Design. Saba Aamir Computing and Software McMaster University. Introduction. A trigger is a statement that the system executes automatically as a side effect of a modification to the database.

By efia (164 views)

Triggers

Triggers

Triggers. The different types of integrity constraints discussed so far provide a declarative mechanism to associate “ simple ” conditions with a table such as a primary key, foreign keys or domain constraints.

By hermione-hodge (102 views)

Triggers

Triggers

Triggers. Triggers. Are event-driven actions Are written in Transact-SQL Are a special kind of Stored Procedure Are tied to a specific table. Why Triggers. To maintain data integrity rules that extend beyond simple referential integrity To keep running totals

By zasha (203 views)

TRIGGERS

TRIGGERS

TRIGGERS. TRIGGERS.

By vance (116 views)

Triggers

Triggers

Triggers. Renata Viegas. Gatilhos (Triggers). Utilizados para implementar regras de negócio da aplicação Sua principal aplicação é a criação de restrições e consistências de acesso ao banco de dados. Gatilhos (Triggers).

By dobry (184 views)