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What do you mean through integrity constraints?
Integrity Constraints -An integrity constraint is a condition specified on a database schema and restricts the data in which can be stored within an instance of the database. If a database instance satisfies all the integrity constraints described on the database schema, it is a legal instance. A DBMS enforces integrity constraints, in which it allows only legal instances to be stored in the database.
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
Differentiate between static hashing and dynamic hashing. Ans: Static Hashing comprises the number of primary pages in the directory fixed. So, while a bucket is full, we requ
What are the disadvantages of file processing system? The drawbacks of file processing systems are a) Data redundancy and inconsistency b) Complexity in accessing data
WHAT IS MEANT BY E-R MODEL
Define functional and multivalued dependencies. Ans: A functional dependency is a assets of the semantics of the attributes in a relation. The semantics point out how at
Ask question #MinimRead Dennis et al. Chapter 6: Minicase 2. Work through it and answer the questions. See the attached example. SequenceDiagram.png Based on the structural mod
State the process of Rearranging Classes and Operations The various, yet similar operation of different classes can be slightly modified thus that they can be covered by a sin
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
Database Management Systems 1. Explain SQL Server 2000 Architecture with diagram. 2. Describe Second Normal and Third Normal Form. 3. Explain about query engine and stora
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
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