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What is the purpose of the following line in the code below “STARTS CURRENT_TIMESTAMP + INTERVAL 3 MINUTE” a.Specifies that the event should start being fired 3 minutes after the time it was created. b.Specifies that the event should be fired every 3 minutes after the time it was created. c.Specifies that the event should start being fired immediately it has been created. d.Specifies that the event should be fired for 3 minutes.

What is the purpose of the following line in the code below “STARTS CURRENT_TIMESTAMP + INTERVAL 3 MINUTE” a.Specifies that the event should start being fired 3 minutes after the time it was created. b.Specifies that the event should be fired every 3 minutes after the time it was created. c.Specifies that the event should start being fired immediately it has been created. d.Specifies that the event should be fired for 3 minutes.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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What is the purpose of the following line in the code below “STARTS CURRENT_TIMESTAMP + INTERVAL 3 MINUTE”

a.Specifies that the event should start being fired 3 minutes after the time it was created.
b.Specifies that the event should be fired every 3 minutes after the time it was created.
c.Specifies that the event should start being fired immediately it has been created.
d.Specifies that the event should be fired for 3 minutes.
CREATE EVENT EVN_record_customer_waiting_time ON SCHEDULE EVERY 1 MINUTE STARTS CURRENT TIMESTAMP + INTERVAL 3 MINUTE ENDS CURRENT TIMESTAMP + INTERVAL 1 HOUR ON COMPLETION PRESERVE COMMENT 'This event computes the total time a customer has waited since they raised a ticket' DO UPDATE `classicmodels.`customer_service_ticket` SET customer_service_total_wait_time_minutes = TIMESTAMPDIFF (MINUTE, `customer_service_ticket_raise_time`, CURRENT_TIMESTAMP), customer_service_ticket_last update CONCAT ('The last 1-minute recurring update was made at ', CURRENT_TIMESTAMP) WHERE customer service ticket resolved = 0;
Transcribed Image Text:CREATE EVENT EVN_record_customer_waiting_time ON SCHEDULE EVERY 1 MINUTE STARTS CURRENT TIMESTAMP + INTERVAL 3 MINUTE ENDS CURRENT TIMESTAMP + INTERVAL 1 HOUR ON COMPLETION PRESERVE COMMENT 'This event computes the total time a customer has waited since they raised a ticket' DO UPDATE `classicmodels.`customer_service_ticket` SET customer_service_total_wait_time_minutes = TIMESTAMPDIFF (MINUTE, `customer_service_ticket_raise_time`, CURRENT_TIMESTAMP), customer_service_ticket_last update CONCAT ('The last 1-minute recurring update was made at ', CURRENT_TIMESTAMP) WHERE customer service ticket resolved = 0;
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