如何从Db2中的列中删除默认约束

Question

I had a table STUDENT_TB, which had column STUDENT_ID, NAME, AGE. I added a column with a following command :-

alter table STUDENT_TB add DOB TIMESTAMP NOT NULL DEFAULT CURRENT TIMESTAMP

as for the DOB column i didn't wanted it to be null. Now i need to remove that default constraint.

I tried searching but not got any success.

Regards.

Answer 1

我试过这个，它运作正常

alter table STUDENT_TB alter DOB drop DEFAULT

Answer 2

ALTER TABLE STUDENT_TB ALTER COLUMN DOB DROP NOT NULL