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3.4.3 Unique Key

Mandatory.

Specify whether or not the key columns nominated are to form a unique key to the table.

Default=NO.

Rules

  • NO (unchecked or not selected), indicates that the key columns nominated do not form a unique key to the table. This allows multiple records with the same key to exist in the table.
  • YES (checked or selected), which indicates that the key columns are to form a unique key to the table. This means that one (and only one) record can exist in the table for any given key value.

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