Is it possible to add more than one constraint for a column?

Dear team,

Is there any possible to add more than one constraint for a column?
I add a unique for a column, but I try to only add is not null for the same coloumn.
His throws error

ERROR on line 1:
ORA-01430: column being added already exists in the table

Thank you
Augustine

You can see here

SQL>CREATE TABLE test_cons( N1 NUMBER);

Table created.

SQL>ALTER TABLE test_cons ADD CONSTRAINT UK_TEST_CONS UNIQUE(N1); 

Table altered.

SQL>ALTER TABLE test_cons MODIFY ( N1 NOT NULL);

Table altered.

SQL>

Concerning
Arun

Tags: Database

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