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Relationship between Security and Integrity:Database security usually refers to access, while database integrity refers to avoidance of accidental loss of consistency. But usually, the turning point or the dividing line among security and integrity is not always clear. Figure shows the relationship among data security and integrity.
Figure: Relationship between security and Integrity
The entity type STUDENT has the following attributes: Student Name, Address, Phone, Age, Activity, and No of Years. Activity represents some campus-based student activity, and No o
Define the Third Normal Form: The third normal form (3NF) is a normal form employed in database normalization. 3NF was initially defined by E.F. Codd in 1971. Codd's definitio
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
Define and differentiate between ordered indexing and hashing. Ans: Ordered indexing: To gain fast random access to records in a file, we can make of an index structure. Every
What are the various symbols used to draw an E-R diagram? Explain with the help of an example how weak entity sets are represented in an E-R diagram. Various symbols used to d
Limitations of File Based System The file-based system has some limitations. The limitations are listed as follows: Isolation and separation of data: When the data is
write on the various type of relationalkey
What is a super key? A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.
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