using a variable inside a trigger - mysql

Question

I am testing out my trigger and it works well all except i can't seem my variables don't seem to work like they should.
For instance
DELIMITER //
CREATE TRIGGER lestrigger
AFTER INSERT ON examinations
FOR EACH ROW
BEGIN
DECLARE the_last_inserted_id INT ;
DECLARE the_class_id INT;
DECLARE the_year_id INT;
SET the_last_inserted_id = LAST_INSERT_ID();
SET the_class_id = (select examination_class_id from examinations where examination_id = 1);
SET the_year_id = (select examination_class_id from examinations where examination_id = 1);
insert into examination_data (ed_cs_id,ed_examination_id) select cs_id,#the_last_insert_id from class_students where cs_class_id = 1 AND cs_year_id = 1;
END //
DELIMITER ;
In this line
insert into examination_data (ed_cs_id,ed_examination_id) select cs_id,the_last_insert_id from class_students where cs_class_id = 1 AND cs_year_id = 1;
the_last_insert_id is being seen as a column
When i try this,#the_last_insert_id,its not seen as a column but its not working either.I have not tried the rest of my variables.
How am i going to define and use this the_last_inserted_id = LAST_INSERT_ID(); for instance?.

Answer 1

You can set
Select STH into the_last_inserted_id from TBL limit 1;
insert into examination_data (ed_cs_id,ed_examination_id)
select cs_id,the_last_insert_id
from class_students
where cs_class_id = 1 AND cs_year_id = 1;
Edit:
# - You are using without declaring, just seting
Select STH into #new_id from TBL limit 1;
and then
insert into examination_data (ed_cs_id,ed_examination_id)
select cs_id,#the_last_insert_id
from class_students
where cs_class_id = 1 AND cs_year_id = 1;