Use Sequence in a trigger : Create Trigger « Trigger « Oracle PL / SQL

Use Sequence in a trigger

   

SQL>
SQL> create table foo(
  2    id number primary key,
  3    data varchar2(100) );

Table created.

SQL>
SQL> create sequence foo_seq;

Sequence created.

SQL>
SQL> create or replace trigger myTrigger
  2    before insert
  3       on foo
  4    for each row
  5  begin
  6    select foo_seq.nextval
  7      into :new.id
  8    from dual;
  9  end;
 10  /

Trigger created.

SQL>
SQL> insert into foo ( data ) values ( 'Christopher' );

1 row created.

SQL>
SQL> insert into foo ( id, data )values ( 5, 'Sean' );

1 row created.

SQL>
SQL> select * from foo;

        ID DATA
---------- ----------------------------------------------------------------------------------------------------
         1 Christopher
         2 Sean

SQL>
SQL> drop table foo;

Table dropped.

SQL> drop sequence foo_seq;

Sequence dropped.

SQL>
SQL>

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