Discussion on question by user87166: Why does a UNIQUE constraint allow only one NULL?

Discussion on question by user87166: Why does a UNIQUE constraint allow only one NULL?

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Imported from a comment discussion on https://dba.stackexchange.com/questions/80514/why-does-a-unique-constraint-allow-only-one-null

database-design null sql-server unique-constraint
first message2017-08-29
last message2872 days ago
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