15.10 - UNIQUE - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

Any two rows in the table cannot have the same value or combination of values in the indexed columns.

You cannot specify UNIQUE for a secondary index:

  • if you also specify ALL.
  • for a secondary index defined on a join index.
  • if you also specify an ORDER BY clause.
  • for a column that has a LOB UDT or XML data type.