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New posts in unique-constraint

PostgreSQL Unique Constraint with Exclusions

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Unique Index except for one string

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SQL Server: "Mostly-unique" index

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How can I specify a unique constraint for attributes using the <xs:unique> as a child element of the <xs:element> tag?

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Unique constraint violation error in while SaveOrUpdate

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Mysql unique constraint allowing single row for a combination

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Django model unique together both ways

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Rollback Transaction on Trigger ERROR

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How to make Django form Field Unique?

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Unique Constraint Violated in SQL

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How to make empty string as null value to allow duplicate empty strings in optional field?

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ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found

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UNIQUE constraint where NULL is one valid value [duplicate]

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Hibernate / JPA many to many relationship through a join table and a composite key, Unique Constraint issue

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Flask-sqlalchemy unique contraint not working

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