Which type of database constraint does the following trigger implement?a.Key constraintb.Dynamic integrity constraintc.Static integrity constraintd.Inter-relational integrity constraint DELIMITER $$CREATE TRIGGER TRG_BEFORE_UPDATE_ON_partBEFORE UPDATE ON part FOR EACH ROWBEGINDECLARE errorMessage VARCHAR (255) ;SET errorMessage = CONCAT ( ' The new selling price of ',NEW.part_sellingprice,' cannot be 2 times greater than the current sellingprice of ',OLD.part_sellingprice);IF NEW.part_sellingprice > OLD.part_sellingprice * 2 THENSIGNAL SQLSTATE '45000'SET MESSAGE_TEXT = errorMessage;END IF;END $$DELIMITER;

Summary: We need to identify the type of database constraint that will implement the given trigger.

Answered: Which type of database constraint does…

Which type of database constraint does the following trigger implement? a.Key constraint b.Dynamic integrity constraint c.Static integrity constraint d.Inter-relational integrity constraint

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter6: Additional Database Objects

Section: Chapter Questions

Problem 6HOA: A new table has been requested to support tracking automated emails sent to customers. Create the...

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Concept explainers

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.

Question

Which type of database constraint does the following trigger implement?

a.Key constraint

b.Dynamic integrity constraint

c.Static integrity constraint

d.Inter-relational integrity constraint

DELIMITER $$
CREATE TRIGGER TRG_BEFORE_UPDATE_ON_part
BEFORE UPDATE ON part FOR EACH ROW
BEGIN
DECLARE errorMessage VARCHAR (255) ;
SET errorMessage = CONCAT ( ' The new selling price of ',
NEW.part_sellingprice,
' cannot be 2 times greater than the current selling
price of ',
OLD.part_sellingprice);
IF NEW.part_sellingprice > OLD.part_sellingprice * 2 THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = errorMessage;
END IF;
END $$
DELIMITER;

Organized collection of structured information, or data, typically stored in a computer system.

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