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PostgreSQL Foreign Key -1
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pgAdmin 4 Documentation
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PostgreSQL FOREIGN KEY constraint - w3resource
sql - Can FOREIGN KEY be omitted in PostgreSQL when using REFERENCES? - Stack Overflow
PostgreSQL FOREIGN KEY constraint - w3resource
PostgreSQL Foreign key - javatpoint
PostgreSQL GUI Admin Tool - Postgres manager for Windows by SQL Maestro Group
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PostgreSQL FOREIGN KEY constraint - w3resource
