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A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity?
Integrity simply means to keep the consistency of data. Therefore, integrity constraints in a database make sure that changes made to the database by authorised users do not compromise data consistency. Therefore, integrity constraints do not permit damage to the database.
There are primarily two integrity constraints: the referential integrity constraint and the entity integrity constraint. In order to describe these two, let us first describe the term Key with respect to a Database Management System.
What is the difference between the function module and a normal ABAP/4 subroutine? In contrast to normal subroutines function modules have uniquely exact interface. Declaring da
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In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
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A Structure of a dependency diagram
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
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What are the reasons of bucket overflow? Explain any two methods for solving this problem. Ans: It is general for file structures to be divided into equal-length partitions, k
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
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