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What are the three classes of SQL expression?
SQL expression consists of three clauses:
Select
From
Where
What it creates while a primary key is combined with a foreign key? It creates Parent-Child relation ship between the tables that connect them while a primary key is combined w
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
What is the disadvantage of a call by reference? During a call by reference damage or loss of data is not restricted to the subroutine, but will instantly lead to alters to th
Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo
write a database program for concurrency transaction in a bank
Question: Data Mining is the process of extracting knowledge hidden from large volumes of raw data. (a) Using a suitable example, illustrate how Data Mining can be useful t
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
Benefits and Limitations od Data Models?
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 meth
Explain the Concept of Two-phase Locking It concerns the positions of locking and unlocking operations in each transaction. In this protocol every transaction issue lock and u
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