Automatically Update 2 Table or Multiple in Mysql - mysql

Question

I have problem
I want to ask, how to change the data that has been entered into the table rekap_nilai. which is where the table is rekapan rekap_nilai total of table nilai_student.
I enter a table B based on trigger
mysql> select * from nilai_student;
+----+-------+------+-------+
| id | name | idmp | nilai |
+----+-------+------+-------+
| 1 | Udin | 1 | 80 |
| 2 | Udin | 2 | 60 |
| 3 | Mamat | 1 | 75 |
+----+-------+------+-------+
table rekap_nilai
mysql> desc rekap_nilai;
+-----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| idstudent | int(11) | YES | | NULL | |
| name | varchar(100) | YES | | NULL | |
| nilai | double | YES | | NULL | |
+-----------+--------------+------+-----+---------+----------------+
mysql> select * from rekap_nilai;
+----+-----------+-------+-------+
| id | idstudent | name | nilai |
+----+-----------+-------+-------+
| 1 | 1 | Udin | 140 |
| 2 | 2 | Mamat | 75 |
+----+-----------+-------+-------+
2 rows in set (0.00 sec)
What if there was a remedial student conduct and when update table nilai_student in column nilai, ​​automatically in table rekap_nilai in column nilai
example
now name 'Udin' have nilai 60 in id 2, and he want remedial. when he was remedial, I want to update he's nilai = 70 , and then in table rekap_nilai. udin automatically update to nilai = 150

Answer 1

You can write a trigger which gets executed on update of table nilai_student , some thing like below
Delimiter ///
create trigger update_rekap_nilai after update on nilai_student
for each row begin
update recap_nilai set nilai = nilai - Old.nilai + New.nilai where name=Old.name
end;
///
Delimiter ;
Hope this helps !!