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How many types of users works on database?
Users are differentiated through the way they expect to interact along with the system
(i) Application programmers-interact with system through DML calls (ii) Sophisticated users-form requests within a database query language (iii) Specialized users-write specialized database applications that do not fit within the traditional data processing framework (iv) Naive users-invoke one of the permanent application programs which have been written previously instance, people accessing database over the web, clerical staff, bank tellers
Explain the term- Data Flows Data Flows: A data flow connects output of an object or process to input of another process or object. It represents an in-between data value wit
what do you mean by primary key constraint?
What is difference between TRUNCATE and DELETE? - Truncate can't be rolled back whereas Delete can be. - Truncate keeps the lock on table whereas Delete keeps the lock on ea
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
Control Files : The redo and control files logs support the rest of the architecture. Every database must have at least one control file, although you have more than one to guard
Benefits of using heuristics
he SQL query that will return the order number, quantity ordered, price each and total cost of an order (quantity * price each) from the order details table. Label the calculated c
Synonyms and Indexes Some of the essential properties of indexes are: An Index is a schema Object Indexes can be formed explicitly or automatically Indexes are m
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
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