Question
doctor_id (Foreign Key)
Answer :
Word Count : 476
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Skip in 10
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 a table that needs to reference information about doctors stored in another table. For example, in a hospital database, there may be a “Doctors” table where doctor_id serves as the primary key, uniquely identifying each doctor. Another table, such as “Patients” or “Appointments,” may include doctor_id as a foreign key to indicate which
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