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What are primary keys and foreign keys?
Primary keys are the unique identifiers for every row. They must have unique values and cannot be null. Due to their significance in relational databases, Primary keys are the most fundamental of all keys and constraints. A table can have only one Primary key. Foreign keys are both a method of ensuring data integrity and a manifestation of the relationship among tables.
Discuss in detail the subscriber loop systems. Subscriber Loop System: Every subscriber in a telephone network is linked usually to the nearest switching office by means of w
Home Entertainment: E-commerce has led to HOME ENTERTAINMENT. The video aspect usually includes a large-screen and/or high definition television or a projection system.
How do you turn off cookies for single page in your site? We can turn off the cookies for one page:- By setting the Cookie. Discard property false.
Define Handshaking. Handshaking is a method commonly used to accompany ever data item being transfer with the control signal that show the presence of data in the bus. The unit
Q. Explain about Programmer Visible Registers? Programmer Visible Registers: These registers can be employed by machine or assembly language programmers to minimize reference
Translate the following sentences into predicate logic, using identity (=). a. Everyone was drunk except John. b. Christine rides a bike, but everyone else drives a car. c
Name the dynamic memory allocation function? Three dynamic memory allocation functions are: a) malloc, b) calloc and c) free.
The session support can be turned on automatically at the site level, or manually in every PHP page script: * Turning on session support automatically at the site level: Set s
Expalin the History Of Parallel Computers The researches with and implementations of use of the parallelism started long back in the 1950's by IBM Corporation. The IBM STRETCH
Show System call for cloning. Standard form of Clone function is as follows: Int clone (Int (*FN) (), void *child stack, Int flag, intargs,); Parameter FN is Pointer fro
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