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@E:18408446db2week17TrigPrac_18408446.sql
Damodar Bhattarai
18408446
Week 17
2019.2.24
*/
--##############trigger to check date_of_birth###########
CREATE OR REPLACE TRIGGER trig_dob_ck
BEFORE INSERT OR UPDATE OF date_of_birth ON students
FOR EACH ROW
WHEN (NEW.date_of_birth > SYSDATE)
BEGIN
RAISE_APPLICATION_ERROR(-20000, 'ERROR - THIS STUDENT WAS BORN AFTER TODAY, AMEND STUDENT DATE OF BIRTH!');
END trig_dob_ck;
/
SHOW ERRORS;
-- ####################end of trigger####################
--********** Test for trig_dob_ck ***********
--inserting tomorrow's date for date_of_birth in students
INSERT INTO students
(student_id, student_firstname, student_surname, phone_number, fax_number, gender
,date_of_birth, preferred_language, company_id)
VALUES (229901, 'CHRISIS', 'ADAMSIS', '(213)334-2789', 2133342789, 'M', '22-MAR-2065', 'EN', 30);
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