same sequence in multi table, oracle 10g, sql

1. 1DR. GIRIJA NARASIMHAN
Part 11 - same sequence
in multi tables

2. 2
Sequence numbers are generated independently of tables, so the
same sequence can be used for one or for multiple tables. It is
possible that individual sequence numbers will appear to be
skipped, because they were generated and used in a transaction
that ultimately rolled back. Additionally, a single user may not
realize that other users are drawing from the same sequence.
create sequence seq1
START WITH 6
INCREMENT BY 1
NOCACHE
maxvalue 9
minvalue 6
cycle;

3. 3DR. GIRIJA NARASIMHAN
SQL> create sequence seq1
2 START WITH 6
3 INCREMENT BY 1
4 NOCACHE
5 maxvalue 9
6 minvalue 6
7 cycle;
Sequence created.
SQL> create table t1(tno number(5),tname varchar2(25));
Table created.
SQL> create table girija(gno number(5), name varchar2(25));
Table created.

4. 4
DR. GIRIJA NARASIMHAN
SQL> insert into t1 values(seq1.nextval,'flower');
1 row created.
SQL> select * from t1;
TNO TNAME
---------- -------------------------
8 flower
SQL> insert into t1 values(seq1.nextval,'lotus');
1 row created.
SQL> select * from t1;
TNO TNAME
---------- -------------------------
8 flower
9 lotus
SQL> insert into girija values(seq1.nextval,'mango');
1 row created.
SQL> select * from girija;
GNO NAME
---------- -------------------------
6 mango
SQL> insert into girija values(seq1.nextval,'banna');
1 row created.
SQL> select * from girija;
GNO NAME
---------- -------------------------
6 mango
7 banna
SQL> insert into t1 values(seq1.nextval, 'sunflower');
1 row created.
SQL> select * from t1;
TNO TNAME
---------- -------------------------
8 flower
9 lotus
8 sunflower