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What subschema expresses ?
A subschema expresses the external view. (External schemas are called also called as subschemas)
Relations create the database. They must satisfy various properties, like no duplicate tuples, no ordering of tuples, and atomic attributes, etc. Relations that satisfy these basic
Do you have experts of the dbms
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
What is Conceptual Schema? Conceptual Schema - Conceptual schema elaborates the structure of the overall database for a community of users. It hides the details of physical sto
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
In problems 1 - 4, you are given the columns of a table, and a set of functional dependencies. Determine the normal form of this table. Remember that the normal form is the HIGHE
What will be create when a primary key if combined with a foreign key? A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that
Question: (a) Use the following business rules to produce the E-R diagram. You should clearly show all the minimum and maximum cardinality constraint on each side of the relati
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
define normalisation and functional dependency
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