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Project Description:
This is going to be a School portal to handle each activities in school such as, School fees payment, online registration and every other payment, course registration, general school administrative duties and online clearance.
Skills required are Database Administration, PHP, MySQL, Web Security, Wordpress
Define the basic operations of the relational algebra? Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
Describe analysis of access paths To describe analysis of access paths, consider an example of the design of a company's employee skills database. A part of the object model fr
Q. Define a weak entity set and its identifying relationship. List the necessary conditions for a meaningful identifying relationship set of a weak entity set. Entity is a t
Explain weak and strong entity sets? Weak and Strong entity sets: A physically powerful entity set has a primary key. All tuples in the group are distinguishable through that k
When is a transaction rolled back? Any changes that the aborted transaction made to the database must be uncompleted. While the changes caused by an aborted transaction have be
prototype of a distributed information system for a national car part retail outlet chain.
What do you mean by persistence? How you will make your data persistent? Persistent data is the data, which has a longer lifetime than program which has created it. Enabling th
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
what is cascading? what is rollback cascading? please explain in detail
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