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What are the Issues when Selecting a Database
Issues when Selecting a Database
What are the advantages and disadvantages of using a database system. Sol. Advantages of Database System (DBMS) : (1) Data Redundancy and Inconsistency: Since differen
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
Group By clauses • It is used to group database tuples on the basis of definite common attribute value like as employees of a department. WHERE clause still can be used
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
how to implement hyrise in C plus plus
What is the disadvantage of a call by reference? During a call by reference damage or loss of data is not restricted to the subroutine, but will instantly lead to alters to th
What is a cascading update? Referential integrity constraints needs that foreign key values in one table correspond to primary key values in another. If the value of the primar
Law Associates is a large legal practice based in Sydney. You have been asked to design a data model for the practice based upon the following specification: The practice emplo
Explain the two constraints, check and foreign key in SQL along with an example for each. Give the syntax. CHECK constraint - CHECK constraint specifies an expression which
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