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Define query language? A query is a statement requesting the retrieval of information. The portion of DML that includes information retrieval is known as a query language.
How external/conceptual mapping and conceptual /internal mapping is performed
Homework chapter 10 no 3
We define a view in SQL through using the create view command. To describe a view, we must provide the view a name and must state the query in which computers the view. The form of
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
While using extract datasets it is required to have a special workarea for interface False. It is not required to have a special workarea for interface
Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in o
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p
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