oracle autoincrement

1. create sequence

CREATE SEQUENCE test_sequence

START WITH 1
INCREMENT BY 1;

2. create trigger

รูปภาพ

CREATE OR REPLACE TRIGGER (trigger_name)
BEFORE INSERT ON (table_name)
REFERENCING NEW AS N
FOR EACH ROW
BEGIN
SELECT (sequence_name).nextval INTO :N.(column_name) FROM dual;
END;

 

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