15.10 - Example: Attempting to Add and Drop Constraints in the Same Statement - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Release Number
15.10
Published
December 2015
Content Type
Programming Reference
Publication ID
B035-1144-151K
Language
English (United States)

The following request is not valid because you can add or drop only one constraint per ALTER TABLE request:

    ALTER TABLE table_1
      DROP CONSTRAINT check_1,
      ADD CONSTRAINT check_2 CHECK (column_2 > 0);

The system returns the following message:

     Only a check specification is allowed for the modification.