Example: Making Composite Changes to a Column: NOT NULL to NULL - Teradata Vantage - Analytics Database

Composite changes to columns that involve changing the NOT NULL attribute to NULL are not valid. For example, the following cannot be done:

     ALTER TABLE abc ADD column_2 TITLE 'newname' NULL;

To make these changes, you must perform two separate ALTER TABLE requests:

     ALTER TABLE abc ADD column_2 TITLE 'newname';
     ALTER TABLE abc ADD column_2 NULL;