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Backward Recovery (UNDO):In this system the uncommitted changes made by a transaction to a database are undone. Instead the system is reset to the last consistent state of database that is free from any errors.
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
What are referential integrity constraints? A value that appears in single relation for a given set of attributes also appears for a particular set of attributes in another rel
Draw an ER diagram for company''s database schema
What is equi join? Equi Join - It generates all the combinations of tuples from two relations which satisfy a join condition along with only equality comparison (=).
What is Nested Queries explain in details? Nested Queries - A SELECT query could have subquery(s) in it. While a SELECT query having another SELECT query in it, is known as n
Problem: A DBMS built for Online Transaction Processing (OLTP) is usually regarded as unsuitable for data warehousing. Each system is designed with a different set of requireme
write on the various type of relationalkey
Create Student DB and execute Insert query? STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, course
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