Illustrates the term natural key in Sybase
Illustrates the term natural key in Sybase?
Expert
Assume the database class... okay, I can't think which far therefore, a natural key is a key for a specified table which uniquely identifies the row. It's natural within the sense that this follows the business or real world require. For illustration, assume that social security numbers are unique then when you had the following worker table:
employee:ssn char (08)f_name char(19)l_name char(19)title char (02)
After that a natural key would be ssn. When the combination of _name and l_name were unique on this company, then other natural key would be f_name, l_name. Like a matter of fact, you can have several natural keys in a specified table but in practice what one does is build an artificial or (surrogate) key.
The surrogate key is certain to be unique since (wait, get back, now it goes again) it's classically a monotonically increasing value. Probably, my mathematician wife would be proud of me... actually all this means is that the key is raising linearly as: i+1
Illustrates a stored procedure?
Categorize the Hashing Functions based on the different methods through which the key value is found?
What do you understand by the term Dataset?
Specify the various components of the Report Net?
Explain the term Job parameters?
Describe the some drawbacks of a standard language like SQL?
Describes the examples of EXPLAIN in valid teradata database.
Illustrates the term normalization?
Explain, why we use the lookup transformations?
Write down the snapshot with reference to data warehouse?
18,76,764
1957409 Asked
3,689
Active Tutors
1440894
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!