SQL: How to find duplicates based on two fields?

SQL: How to find duplicates based on two fields?

sql oracle unique unique-constraint ora-00918

oracle

Conditional unique constraint in oracle db

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oracle

Conditional unique constraint with multiple fields in oracle db

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oracle

How to check if all fields are unique in Oracle?

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oracle

Find a Database table's unique constraint

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oracle

Is it possible to set a unique constraint as a foreign key in another table?

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oracle

INSERT into unique column same value from two sessions (Oracle)

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oracle

Select records with few unique columns while choosing not null value over another column in priority

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oracle

How to do a Cross column unique constraint in SQL (Oracle)

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oracle

"no matching unique or primary key for this column-list". The primary key does exist though

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oracle

First Name and Last Name must be Unique Together in SQL

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oracle

In Oracle, does the unique constraint include an index implicitly?

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oracle