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At its most essential level the DBMS architecture can be divide into two parts: the back end and the front end. The back end is responsible for managing the physical database an
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
2NF Normal Form : A relation schema process R is in 2NF if it is in 1NF and each non-prime attribute A in R is fully functionally related on primary key. Second normal form (2N
Problem: (a) Data mining is one of the best ways to analyse data and using software techniques, hidden and unexpected patterns and relationships in sets of data can be extrac
er diagram on cosmetics.
What do you mean by Correlated subquery? Subqueries, or nested queries, are used to bring back a set of rows to be used by the parent query. Depending on how the subquery is writ
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
sql is relationally complete-justify
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