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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is data model? Explain object based and record based data models? Ans: A data model is an abstract model in which describes how data is represented and accessed. (i)
why are older data base model are being replaced by new data model
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
Fragmentation: It is definite as partitioning of a relation into various fragments.Every fragment can be stored at a dissimilar site.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
Natural Join : It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation
List and also explain the dissimilar stages of DDLC ?
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
What is the difference between the function module and a normal ABAP/4 subroutine? In contrast to normal subroutines function modules have uniquely exact interface. Declaring da
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
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