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Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
under what condition log based recovery is feasible?
what is attribute is attribute inheritance in dbms?
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
Define decision tree classifiers? As the name suggests decision tree classifiers use a tree: Every leaf node has an associated class, and every internal node has a predicate as
What is aggregate function? Briefly describe it? Aggregate functions are functions that take a collection of values as input and return a one value. SQL offers 5 built-in aggre
Explain the relevance of Data Dictionary in a Database System? Data dictionary is a database in its own right residing on the disk that consist of Meta data which is = Data abo
Different stages of DDLC ?
Which component is not included in database environment ? A users component is not included in database environment.
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