hello please i need help with this trigger, i have a trigger that stops a record in a table from being duplicated. each time i insert a record, it fires and raises an error not minding if the condition in the trigger was true or false.
pls find trigger below
alter trigger TRG_CHECK_PROGRAMME_COURSE_DUPLICATE
On dbo.Institution_Programme_Courses
for Insert
as
declare @ProgrammeId int,
@CourseId int,
@CourseTypeId int,
@CourseUnit int,
@SemesterId int,
@LevelId int
select @ProgrammeId=ProgrammeId,
@CourseId=CourseId,
@CourseTypeId=CourseTypeId,
@CourseUnit=CourseUnit,
@SemesterId=SemesterId,
@LevelId=LevelId
from Inserted
if exists( select ProgrammeCourseId
from dbo.Institution_Programme_Courses
where ProgrammeId=@ProgrammeId
AND CourseId=@CourseId
AND CourseTypeId=@CourseTypeId
AND CourseUnit=@CourseUnit
AND SemesterId=@SemesterId
AND LevelId=@LevelId
)
begin
RAISERROR ('This Course SetUp Already Exist, Add New Operation Aborted', 16, 1)
rollback tran
return
end
from this trigger, i am trying to prevent the following record below from repeating twice. (i am avoiding duplicate records)
@ProgrammeId,
@CourseId,
@CourseTypeId,
@CourseUnit,
@SemesterId,
@LevelId
please what am i doing wrong?
