Create a trigger for user maintenance in oracle database 11g

Опубликовано: 23 Октябрь 2024
на канале: Learn Oracle
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Create a trigger for user maintenance in oracle 11g
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Oracle allows you to define procedures that are implicitly executed when an INSERT, UPDATE, or DELETE statement is issued against the associated table. These procedures are called database triggers.

Triggers are similar to stored procedures, discussed in Chapter 14, "Procedures and Packages". A trigger can include SQL and PL/SQL statements to execute as a unit and can invoke stored procedures. However, procedures and triggers differ in the way that they are invoked. While a procedure is explicitly executed by a user, application, or trigger, one or more triggers are implicitly fired (executed) by Oracle when a triggering INSERT, UPDATE, or DELETE statement is issued, no matter which user is connected or which application is being used.

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