Update a field to a Sequence based on another Field

Question

Hello Everyone,
Little problem: -
CREATE TABLE: -
CREATE TABLE SEQTABLE
("GRP_NUM" VARCHAR2(20),
"ORDER" NUMBER(5),
"NEW_GROP" VARCHAR2(20) ) ; DATA:-
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP"     )     VALUES ('POIP1234567891234567' ,1 ,''  )
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP" ) VALUES ('POIP1234567891234567' ,2 ,''  )
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP" ) VALUES ('POIP1234567891234567' ,3 ,''  )
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP" ) VALUES ('LKJG1234567897412589' ,1 ,''  )
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP" ) VALUES ('JHGF1234567891234567' ,1 ,''  )
INSERT INTO SEQTABLE ("GRP_NUM" ,"ORDER" ,"NEW_GROP" ) VALUES ('JHGF1234567891234567' ,2 ,''  ) SELECT *
SQL> SELECT * FROM SEQTABLE;
GRP_NUM                ORDER        NEW_GROP
POIP1234567891234567          1
POIP1234567891234567          2
POIP1234567891234567          3
LKJG1234567897412589          1
JHGF1234567891234567          1
JHGF1234567891234567          2 Here my problem, I need to generate a smaller GRP_NUM in the NEW_GROP field. But cant just Substr the original field. This field has to be uniquie to the group.
Desired Results: -
GRP_NUM                  ORDER        NEW_GROP
POIP1234567891234567          1             10001
POIP1234567891234567          2             10001
POIP1234567891234567          3             10001
LKJG1234567897412589          1             10002
JHGF1234567891234567          1             10003
JHGF1234567891234567          2             10003 Any ideas guys

Answer 1

-- Data:
with seqtable as
select 'POIP1234567891234567' grp_num,1 "ORDER",'' new_grop  from dual union all
select 'POIP1234567891234567' ,2 ,''   from dual union all
select 'POIP1234567891234567' ,3 ,''   from dual union all
select 'LKJG1234567897412589' ,1 ,''   from dual union all
select 'JHGF1234567891234567' ,1 ,''   from dual union all
select 'JHGF1234567891234567' ,2 ,''  from dual
-- Query:
select grp_num, "ORDER",
       dense_rank() over (order by grp_num desc)
from seqtable;or:
-- Data:
with seqtable as
select 'POIP1234567891234567' grp_num,1 "ORDER",'' new_grop  from dual union all
select 'POIP1234567891234567' ,2 ,''   from dual union all
select 'POIP1234567891234567' ,3 ,''   from dual union all
select 'LKJG1234567897412589' ,1 ,''   from dual union all
select 'JHGF1234567891234567' ,1 ,''   from dual union all
select 'JHGF1234567891234567' ,2 ,''  from dual
-- Query:
select grp_num, "ORDER",
       10000 + dense_rank() over (order by grp_num desc)
from seqtable;I suggest not to use "ORDER" as column name, because it is an oracle reserved word.
You may ommit the quotes, when you use another column_name.