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what is er digram given that example of hospital,bank and library er digram.
what is Nested relational model? Explain with examples.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
1. Create a subroutine that does the remote blast on the file protein.fa. 2. Pass that returned files from the blast to another subroutine that parses the output and sends it to
Give detail description on Transactions. - Using transactions we can group all SQL commands into a single unit. - Transaction begins with some task and finishes only when a
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
For each m:n relationship type R, we make a new table (say S) to represent R. We also contain the primary key attributes of both the participating entity types as a foreign key att
What is the role of a database administrator?
explain at least five widly used case tools
Explain view in RDBMS? View - A view is a relation (virtual rather than base) and could be used in query expressions, which is, queries can be written by using the view as a re
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