MySQL Trigger Simple instance

Three after triggers

DROP TABLE IF EXISTS tab1;
CREATE TABLE Tab1 (
tab1_id varchar (11),
Tab1_name varchar (11),
Tab1_pass varchar (11)
);
DROP TABLE IF EXISTS tab2;
CREATE TABLE TAB2 (
tab2_id varchar (11),
Tab2_name varchar (11),
Tab2_pass varchar (11)
);
--Add after insert trigger
DROP TRIGGER IF EXISTS t_afterinsert_on_tab1;
CREATE TRIGGER T_AFTERINSERT_ON_TAB1
After INSERT on TAB1
For each ROW
BEGIN
Insert into TAB2 (Tab2_id,tab2_name,tab2_pass) values (New.tab1_id,new.tab1_name,new.tab1_pass);
END;
INSERT into TAB1 (tab1_id,tab1_name,tab1_pass) VALUES (' 0001 ', ' name1 ', ' pass1 ');
SELECT * from TAB1;
SELECT * from TAB2;

--Add after UPDATE trigger
DROP TRIGGER IF EXISTS t_afterupdate_on_tab1;
CREATE TRIGGER T_AFTERUPDATE_ON_TAB1
After update on TAB1
For each ROW
BEGIN
Update tab2 Set tab2_id = new.tab1_id, Tab2_name = new.tab1_name, Tab2_pass = New.tab1_pass;
END;
Update TAB1 Set tab1_id = ' 0002 ', tab1_name = ' name2 ', Tab1_pass = ' pass2 ';
SELECT * from TAB1;
SELECT * from TAB2;

--Add after Delete trigger
DROP TRIGGER IF EXISTS t_afterdelete_on_tab1;
CREATE TRIGGER T_AFTERDELETE_ON_TAB1
After delete on TAB1
For each ROW
BEGIN
Delete from tab2 where tab2_id = old.tab1_id;
END;
Delete from tab1 where tab1_id = ' 0002 ';
SELECT * from TAB1;
SELECT * from TAB2;

MySQL Trigger Simple instance