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Describe the two types of methods for retrieving rows in Python?
What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
ERD Diagram of Medical Recruitment Agency?
describe objectivde of file organisation
How to draw an ER diagram to a finance companz
what is specialization?
object oriented database
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
Explain the difference between using functions along with and without grouping attributes in relational algebra. Give examples. Ans: Group functions are used to group data of
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