What is the difference between SET and MULTISET tables in Teradata?

In Teradata, the main difference between SET and MULTISET tables lies in how duplicate rows are handled:

• SET tables: SET tables do not allow duplicate rows. If an attempt is made to insert a duplicate row, Teradata will return an error and the insertion will fail.
• MULTISET tables: MULTISET tables do allow duplicate rows. Duplicates can be inserted into a MULTISET table without any errors.

It is important to choose between SET and MULTISET based on the requirements of the data and the intended behavior of the table. SET tables are commonly used when data integrity and uniqueness are crucial, while MULTISET tables are used when duplicate rows are acceptable.