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eplam2
Starting Member
11 Posts |
Posted - 2013-09-10 : 06:06:17
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Say for instance I have a table called STUDENTS. This table will have columns named: Name, Gender, Birthday, Sex, and Year Level. How do I use a trigger to ensure that the student is NOT above 50 years of age?Is this right? CREATE OR REPLACE TRIGGER student_age_constraint BEFORE INSERT ON Student FOR EACH ROW BEGIN IF (SELECT COUNT(*) FROM student WHERE birthday=ROUND((SYSDATE-NEW.birthday)/365, 2)) > 50 THEN Raise_application_error(-30001, 'Invalid Attribute! Any student above the age of 50 is not accepted!'); END IF; END;Thanks in Advance! |
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bandi
Master Smack Fu Yak Hacker
2242 Posts |
Posted - 2013-09-10 : 06:16:04
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Check the below: CREATE OR REPLACE TRIGGER student_age_constraintBEFORE INSERTON StudentFOR EACH ROWBEGINIF (ROUND((SYSDATE-NEW.birthday)/365, 2)) > 50 ) THENRaise_application_error(-30001, 'Invalid Attribute! Any student above the age of 50 is not accepted!');END IF;END;NOTE:I doesn't sure about the syntax in Oracle... This is SQL Server ForumRefer this linkhttp://docs.oracle.com/cd/E18283_01/appdev.112/e17126/triggers.htm#BCFIDDBB--Chandu |
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