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List any two disadvantages of a database system ?
The disadvantages of database system are:• Database systems are difficult, complex, and time-consuming to design.• Substantial software and hardware start-up costs.• Damage to database affects virtually all applications programs.• Extensive conversion costs within moving form a file-based system to a database system.• Initial training needed for all programmers and users.
Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
This project requires you to perform a systems analysis and then design a system solution using database software. Ace Auto Dealers specializes in selling new vehicles from Subaru.
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
In which format database schema is written ? Data base schema is written in the DDL format.
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
folding method and mid square method using visual basic
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
Write a program within embedded SQL to associative the total trip expenses of the salesman named ‘John' for the relations. EXEC SQL BEGIN DECLARE SECTION; long total_expenses;
explain ANSI SPARC architecture
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