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What is schema
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
er diagram on cosmetics.
What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct
Text Processing: Use readLines to read SOU.txt into R. Create a vector called Pres containing the names of the presidents giving each speech. To do this, rst identify the lin
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