Migration Alter Table SQL Server to Oracle

Question

I want to migrate this sentence in SQL Server to Oracle:

ALTER TABLE <name table> ADD DEFAULT (NULL) FOR <name column>;

I'm beginner in SQL Server and Oracle so I don't know what it means with DEFAULT (NULL) FOR .

If you can help me with the migration please and explain the sequence.

Answer 1

The syntax is

ALTER TABLE <TABLE_NAME> MODIFY <COLUMN_NAME> DEFAULT NULL;

Though the above doesn't make much sense. The sample below tries to make some

ALTER TABLE <TABLE_NAME> MODIFY <ANY_DATE_COLUMN_NAME> DEFAULT SYSDATE;