Rules and Restrictions | ALTER TABLE | Teradata Vantage - Rules and Restrictions for the Number of Changes Made in One ALTER TABLE Statement - Advanced SQL Engine - Teradata Database

The rules for number of changes that can be made within a single ALTER TABLE statement are as follows.

• Only one change can be made per column per ALTER TABLE statement.
• Only one CHECK alteration is permitted per ALTER TABLE statement, and you cannot mix CHECK and non-CHECK alterations on the same table for the same ALTER TABLE statement.