Question

How can I write an insert query for an Oracle database which has a sequential primary key so that the insert statement automatically takes the next number in the sequence?

INSERT INTO LD_USER_ROLE(USER_ROLE_ID,INS_USER,INS_DATE, USERNAME) 
VALUES (100, 'sp22',to_date('2003/05/03 21:02:44','yyyy/mm/dd hh24:mi:ss'),'JOHN BARRY', )

In the above statement I have hardcoded the value of 100 for the key ‘USER_ROLE_ID’ but I’d like to alter this as explained in the first paragraph.

Answer 1

Apart from using a trigger, you can use a sequence directly in the insert statement:

CREATE SEQUENCE LD_USER_ROLE_SEQ;

INSERT INTO LD_USER_ROLE
   (USER_ROLE_ID,INS_USER,INS_DATE, USERNAME) 
VALUES 
   (ld_user_role_seq.nextval, 'sp22',to_date('2003/05/03 21:02:44','yyyy/mm/dd hh24:mi:ss'),'JOHN BARRY', )