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Support by Adding Indexes
Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the number of paths is added with the use of indexes. Let us talk about two main approaches in this category: Multi-List file organisation and Inverted file organisation.
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
What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei
What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
How to Insert data in your table from another table? insert into e.g, To insert tuples from employee into N_emp created above, use following statement Insert into N_emp
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
What is Interaction Diagram An interaction diagram shows an interaction, comprises of a set of objects and their relationships including the messages that may be dispatched be
State the Object Design for Processing The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i
What is the use of with clause in SQL? The with clause gives a way of defining a temporary view whose explanation is available only to the query in which the with clause occurs
Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF. Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relati
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
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