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What is Disadvantages Of DBMS ? 1. Cost of Software and Hardware and Migration - A important disadvantage of the DBMS system is cost. 2. Reduced Response and Throughpu
how to prepare a data dictionary for online examination system for certified courses?
why older data models are being replaced by new data models.
Let consider the given partial relation EMP. Let us make some sub-queries for them EMPNO ENAME JOB SAL DEPTNO 7566
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
What is an ER diagram? Why is it used in Database management system (DBMS)?
Suppose R is a relation with attributes A1, A2,..., An. As a function of n, tell how many superkeys R has, if: 1.1 The only key is A1. 1.2 The only key is A1 and A2. 1.3 The o
In Database software have only pure security or some dis secured by administrator?
Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
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