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Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a method? Justify your choice.
What is a super key? A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin
Draw an ER diagram for company''s database schema
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
wh
What are the two types of errors? The two types of errors are: a) Logical error b) System error
List any two significant differences between a file processing system and a DBMS. File Processing System vs. DBMS Data Independence - Data independence is the capacity t
what is entity in database system?
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