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In a relational database system, the attribute doctor_id defined as a foreign key plays a crucial role in establishing and maintaining relationships between tables. A foreign key is an attribute or a set of attributes in one table that refers to the primary key of another table, thereby ensuring referential integrity within the database. In the context of a DBMS lab, understanding the concept of doctor_id as a foreign key is essential for designing normalized and logically consistent database schemas, especially in applications such as hospital management systems. The doctor_id attribute is typically found in _________ ___ _________ ________ ______ _____ _______ ______ ____ ________ ________ _______.
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