Levels of data abstraction
Illustrates the levels of data abstraction?
Expert
Three levels of abstraction are defined here as follows::
Physical level:
It is the lowest level of abstraction explains how data are stored.
Logical level:
It is the next higher level of abstraction, explains what data are stored inside database and what connections among such data.
View level:
It is the highest level of abstraction explains only part of whole database.
Explain how the Chasm trap is solved?
Explain how do you produce the Sequence number within the Data stage?
Determine the best value for cschedspins?
State the steps for “this message could not delete” from the particular tables?
Explain the various types of the designer tools?
Explain the group by in select statement? Answer: Group by clause is utilized in Teradata to eliminate repetitive values in a column or group of columns, while we se
Explain the uses of stored procedure?
List out the various detected patterns.
Describe briefly reusable transformations?
Name the methods and types of Collision Resolution Techniques used in each of the type?
18,76,764
1926327 Asked
3,689
Active Tutors
1427040
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!