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What are the advantages of object ID? The main advantages of Object IDs are as below: i) IDs are not changing ii) IDs are completely independent of the changes in data v
draw er diagram using entities crop,employee,department,plot,cultivation plan,machinery,seed,fertilizer
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Consider the following relational database: STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, course#, sem
Depending upon the rules we have found, we can classify the locks into two types. Shared Lock: A transaction might be acquiring shared lock on a data item in order to read it
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
What do you mean by persistence? How you will make your data persistent? Persistent data is the data, which has a longer lifetime than program which has created it. Enabling th
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
Explain the use of constraints in functional model with suitable example. A constraint shows relationship between two objects at same time, or among various values of the sam
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