In Postgresql, force unique on combination of two columns

In Postgresql, force unique on combination of two columns

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Postgres unique constraint vs index

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Composite PRIMARY KEY enforces NOT NULL constraints on involved columns

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Unique model field in Django and case sensitivity (postgres)

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Why does Postgres handle NULLs inconsistently where unique constraints are involved?

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PostgreSQL Partial Indexes and UPSERT

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Postgres hash index with unique constraint

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Postgresql enforce unique two-way combination of columns

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Postgres Unique Constraint on two columns: Integer and Boolean

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How to get distinct array elements with postgres?

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PostgreSQL unique value acreoss multiple columns

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Partial Index not used in ON CONFLICT clause while performing an upsert in Postgresql

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PostgreSQL Upsert with a WHERE clause

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PostgreSQL partial unique index and upsert

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SQL aggregation function to choose the only value

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