S
Sowjanya Kodiganti

Posted on 27th February 2024|35 views

0
votes

Postgres Unique Constraint Null

What is PostgreSQL Unique Constraint Null?

Answers
P
naseer mohammad

Posted on 27th February 2024

As this function allowed only one null in a unique column created by using a partial expression index.

Constraints created using this method where for every non-null composite indexed value allows only a single null.

A unique constraint is a field that can contain the null values until its combination of values is unique in the tables.

 

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