Surrogate key-primary key
Describe a surrogate key and also explain the ideal primary key and illustrate how surrogate keys meet up this ideal?
Expert
The ideal primary key is numeric, short and fixed. A surrogate key is an exclusive, DBMS-supplied identifier intended to be employed as the primary key of a table. Furthermore, the DBMS will not permit the value of a surrogate key to be modified. The values of a surrogate key have no meaning to the users and are generally hidden on forms and reports. By design, they are numeric, short and fixed and therefore meet the definition of the ideal primary key.
To implement the priority queue what is the minimum number of queues we need?
Which type of pointer will be use to implement the heterogeneous linked list in C language?
Give a brief differentiation between metadata and data dictionary?
In which circumstance should you recompile the package body after recompiling the package requirement?
Briefly describe the term ‘BOMain.Key’?
Should I use numerous devices to take benefit of Partitions in Sybase?
Describe some of the major objectives of normalization?
What is a derived (artificial) primary key? When must this be used?
Explain how teradata ensures that there are no duplicate rows being inserted when it’s a SET table?
What does it mean when we say that a relation is in Boyce-Codd Normal Form (BCNF)?
18,76,764
1940071 Asked
3,689
Active Tutors
1446720
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!