IGNOU BCSL 34 2026 2027 -  patient_id (Primary Key, INT, Auto Increment)

Question

 patient_id (Primary Key, INT, Auto Increment)

07 Aug 2026

Answer :

Word Count : 494

The `patient_id` is an important attribute used to uniquely identify each patient in a database table. In a Database Management System (DBMS), it is generally defined as the Primary Key of the patient table. A primary key is a field whose value must be unique for every record and cannot contain a `NULL` value. Therefore, two patients in the same table cannot have the same `patient_id`. The data type `INT` indicates that the `patient_id` will store integer values such as 1, 2, 3, 4, and so on. Using an integer data type is appropriate because patient identification numbers normally do not require decimal values or textual characters. It also makes searching, indexing, sorting, and joining tables more efficient. The term Auto Increment means that the database system automatically generates a new value for

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