Which of the following is valid statement for triggers
INSERT, UPDATE, and DELETE are acceptable trigger actions, as are combinations of several, separated by commas.
In which of the following events are triggers used
The following events can trigger the execution of a trigger: a database operation (SERVERERROR, LOGON, LOGOFF, STARTUP, or SHUTDOWN), a database definition (DDL) statement (CREATE, ALTER, or DROP), or a database manipulation (DML) statement (DELETE, INSERT, or UPDATE).
What statement about triggers is true
Which of the following statements about triggers is true: You use a system event trigger to fire when an UPDATE statement occurs. You use an application trigger to fire when a DELETE statement occurs.
Which of the following are benefits of trigger
Benefits of Triggers
- automatic generation of some derived column values.
- referential integrity enforcement.
- recording events and keeping track of table access data.
- Auditing.
- replication of tables in sync.
- imposing authorizations for security.
- avoiding fraudulent transactions.
What is trigger statement
When a trigger event occurs, any SQL statement that is an instance of the trigger event is referred to as a triggering statement. Triggers defined on tables and triggers defined on views differ in whether the triggering statement is executed: For tables, the trigger event and the trigger action both execute.
Which statement is used to create a trigger
The CREATE TRIGGER statement is used to create a trigger, and the definition specifies the specific type of statement for which the trigger activates and whether it should happen before or after the rows are modified.
Which of the following is not correct for trigger
Q. | Which of the following is not true in case of triggers? |
---|---|
A. | Triggers accept parameters. |
B. | Triggers are executed implicitly |
C. | Execution of triggers is transparent to the users. |
D. | A trigger can invoke another trigger. |
er activity and indicate some kind of lifecycle
Explanation: The load event, fired on the Window object when the document is fully loaded, is likely the most widely used of these events. These events are not directly triggered by user activity, but rather by network or browser activity, and they indicate some kind of lifecycle or state-related change.
How do I edit a event in MySQL
The name of an event cannot be changed in MySQL; instead, use the DROP EVENT statement to delete an existing event, and then use the CREATE EVENT statement to create a new event with the new name, making sure that all other parameters are the same.
What kind of constraint enforces referential integrity between tables
Referential integrity ensures that the relationship between the database tables is preserved during the data insertion process and is enforced by the FOREIGN KEY constraint in the child table that references the PRIMARY KEY in the parent table.Oct 31, 2017
Which statement about trigger is not true
Q. | Which of the following is not true in case of triggers? |
---|---|
A. | Triggers accept parameters. |
B. | Triggers are executed implicitly |
C. | Execution of triggers is transparent to the users. |
D. | A trigger can invoke another trigger. |
Why we use triggers in Oracle
You can use triggers to: Restrict DML operations against a table to those issued during regular business hours, Automatically generate derived column values, and many other things. Triggers supplement the standard capabilities of Oracle to provide a highly customized database management system.
Which command is used to removing trigger
The trigger must be in your own schema or you must have the DROP ANY TRIGGER system privilege in order to remove a database trigger from the database using the DROP TRIGGER statement.
What are triggers in SQL
When a user attempts to modify data through a data manipulation language (DML) event, which are INSERT, UPDATE, or DELETE statements on a table or view, a trigger is a special type of stored procedure that automatically runs in the database server.July 1, 2022
What is the advantage of trigger in SQL Server
Useful for catching errors MySQL triggers can catch errors in business logic in the database layer.Jun 22, 2020 Integrity of data With the help of MySQL trigger, we can check the integrity of data in the table.