Sequence of character and Date

Hello

Oracle 11.2.0.1
Windows

Is there any way by which I can get next character and date as it takes the sequence number please? Suppose that in my table below is data:
AA
AB
CA
AD
..
..
AX
AY
AZ
BA
BB
BRITISH COLUMBIA
...
BX
BY
BZ

and I would like to get this type of sequence of object / function. Similar work if possible, date also please.

Thank you.

You are looking for something like this?

create table test (col1 varchar2(2),col2 date,id number);

CREATE OR REPLACE TRIGGER testtrig
BEFORE INSERT ON test
FOR EACH ROW
DECLARE
BEGIN
select max(trunc(nvl(col2,sysdate)))+1
into :new.col2 from test;
select x1.seq
into :new.col1
from
(
with
  letters
  as
  (select chr( ascii('A')+level-1 ) letter
     from dual
  connect by level <= 26
  )
select l1.letter || l2.letter as seq,rownum as rr
    from letters l1, letters l2
) x1
where x1.rr=(select count(*) from test)+1;
end;
/

SQL> insert into test(id) values (1);

1 row created.

SQL> insert into test(id) values (2);

1 row created.

SQL> insert into test(id) values (4);

1 row created.

SQL> insert into test(id) values (5);

1 row created.

SQL> select * from test;

CO COL2              ID
-- --------- ----------
AA                    1
AB 07-JUN-13          2
AC 08-JUN-13          4
AD 09-JUN-13          5

SQL>

Idea received from http://asktom.oracle.com/pls/apex/f?p=100:11:0:P11_QUESTION_ID:4136198000346693074

Example, above work for 676 lines, because I gave the length of col1 like 2. If you want to develop in more lines, then follow the link that I write here.

If you want to start your date column from a specific date, then in the code above to triger:
Select max (trunc (nvl (col2, sysdate))) + 1
You can give your date for sysdate instead

and you did.

If the above doesn't work, or you're looking for something different, then let us know.

Concerning
Girish Sharma

Tags: Database

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