How to add 1 to existing column in a table

Question

给定一个表列，例如“ RollNumber”，如何为所有行将RollNumber的值增加1？

Answer 1

Just update your table as:

UPDATE YourTable
SET RollNumber = RollNumber + 1;

Answer 2

step-1 : create sequence

CREATE SEQUENCE id START WITH 1 INCREMENT BY 1;

Step-2 : update :

update tableName set RollNumber = id.nextval;