automatic insertion of a new value in a column

ANISH THOMAS · New User Joined: 23 Jan 2008 Posts: 2 Location: pune

hi! all,

i want to insert a value in a column depending on the previous value of that same column.

let me clear it with a example.

i have a employee table( columns are emp-id, name, salary). now i want to add a new row to that table. so i want that the emp-id column to be inserted automatically with different values whenever i insert a new row.
so how will i write a querry which will fetch the last emp-id n based on that it will generate a new emp-id(like incrementing the last emp-id value).

i hope i am clear.

stodolas · Posted: Thu Feb 14, 2008 4:31 pm

ravi17s · New User Joined: 15 Aug 2003 Posts: 57

If your are in V8 I suggest you to go for Identity column.
More easy to maintain.....

In your ex the EMP_ID column must be defined as an Identity column.

abhishekmdwivedi · New User Joined: 22 Aug 2006 Posts: 95 Location: india

Hi ,

This might be helpful,
Create table emp1(
emp_no integer not null
generated always as identity
(start with 1
,increment by 1
, no maxvalue
,no cycle
,order)
,name .....