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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 substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
define locking in simple language and decribed it
composite attribute
imagery
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
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
Ask Write the SQL code that will create the table structure for a table named EMP _1. This table is a subset of the EMPLOYEE table. The basic EMP_1 table structure is summarized in
define lock conversion
sql is relationally complete-justify
prototype of a distributed information system for a national car part retail outlet chain.
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