The sequence number when exporting should represent stacks

Question

When exporting images, I would like the sequence number to apply to the first image in a stack, but the rest of the images in the stack should have the same number as the first one but with an extra suffix. Something like this:
stack 1:
DSCN0010.DNG
DSCN0011.DNG
DSCN0012.DNG
stack 2:
DSCN0013.DNG
DSCN0014.DNG
When exported, I would like them to be:
DSCN0010.DNG --> "image-01.jpg"
DSCN0011.DNG --> "image-01b.jpg"
DSCN0012.DNG --> "image-01c.jpg"
DSCN0013.DNG --> "image-02.jpg"
DSCN0014.DNG --> "image-02b.jpg"

Answer 1

Hi,
The numbers in a CREATE SEQUENCE statement are all literals; no other kinds of numeric expressions are allowed.
You need dynamic SQL to do anything like what you want. For example:
COLUMN     seq_start_col     NEW_VALUE  seq_start
SELECT     1 + MAX (val)     AS seq_start_col
FROM     table_x;
CCREATE SEQUENCE TEST_SEQ.NEXTVAL
START WITH  &seq_start
MAXVALUE 9999999999999999999999999999
MINVALUE 1
NOCYCLE
CACHE 20
NOORDER;