How to get the max sequence number when some record exists in the database table

Hello

I need to create the sequence that he should leave value max already exists in the table.

Example:
I have a table as below:

ID NAME
1A
1 a
3 C
4 D


Now, during the creation of sequence it should start from 5 but I should ' t START WITH 5 hard-code in the sequence to create. Is it possible to do without Hardcoding the max value in the sequence. It automatically brings the value max + 1 for the next data when I insert.


CREATE THE TEST_SEQ SEQUENCE. NEXTVAL
START WITH [Max + 1 val of the table]
MAXVALUE 9999999999999999999999999999
MINVALUE 1
NOCYCLE
CACHE 20
ALL;


Thank you...

Published by: 998976 on April 18, 2013 04:37

Published by: 998976 on April 18, 2013 04:38

Hello

All the numbers in a CREATE SEQUENCE statement are literals; no other types of numeric expressions are allowed.
You need dynamic SQL statements to do something 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;

Tags: Database

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