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Primary Index In primary index, there is a one-to-one relationship among the entries in the index table and the records in the major table. Primary index can be of two types:
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
What is entity in DBMS? Entity: A DBMS entity is either a thing in the modelled world or a drawing element in an ERD.
Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Advantages of Database management system Let us summarize the advantages. Reduction of Redundancy: This is perhaps the most important advantage of using DBMS. Redundancy i
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
Why older data models are being replaced by new data modelling 100 words accepted#
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band
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