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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.
what is ment by avl tree n insertion n deletion ,2-3 tress insertion n deletion
Fetching a word from memory: CPU transfers the address of the needed information word to the memory address register (MAR). Address of the needed word is transferred to the pr
Q. Options with DIR in DOS? You can use a number of options with DIR. To get the list of files from any other drive, denote the drive name followed by ':' with DIR. For exam
DOM is the Document Object Model (DOM) which is an interface specification handled by the W3C DOM Workgroup that explains an application independent mechanism to access, parse, or
Canonical Genetic Algorithm: In such a scenario with all search techniques there one of the first questions to ask along with GAs is how to define a search space that is actua
Illustrate the Purchase Consummation activity? Purchase Consummation: This model lists three activities in the purchase consummation phase: • Receipt of product. • Pl
how to implement the multiple stack
Difference between static and dynamic RAM. Draw the circuits of one cell of each and explain its working. Ans: Differentiation among Static RAM and Dynamic RAM: Static
What are the different between hypertext hypermedia? Hypertext is fundamentally the same like regular text; this can be stored, read or searched and edited along with a signifi
Vector-Scalar Instructions In this category, when combination of vector and scalar are fetched and stored in vector register. These instructions are referred with the subsequen
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