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Briefly explain the state diagram by taking one example. State Diagram - An object can be given a sequence of input instructions. The state of the object can vary depending u
Difference between LEFT OUTER JOIN and RIGHT OUTER JOIN In left outer join tuples from the left-hand-side relation which do not match any tuple in the right-hand-side relation
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
We face problem of stock Opening balance and closing balance in Minus
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
BCNF Boyce-Codd Normal Form A relation schema R is in BCNF if it is in 3NF and accepts an additional constraint that for every FD X A, X has to be a candidate key. If a relati
How the time stamps are implemented Use the value of the system clock as the time stamp. That is a transaction's time stamp is equivalent to the value of the clock when the tra
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