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List the table modification commands in SQL?
A) Deletion
B) Updates
C) Insertion
D) Update of a view
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
what are the type of the database
it can be possible to create any table without primary key
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Show, with the help of an example, that relatively high-level transitions result when system or program is stimulated by the outside events. In diagram below, we can observe i
Lost Updates : Suppose the two transactions T3 and T4 run simultaneously and they happen to be interleaved in the following way (suppose the initial value of X as 10000):
Heap files (unordered file) Mostly these files are unordered files. It is the easiest and most basic type. These files having of randomly ordered records. The records will have
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
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