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Designing the fields in the data base
The following are the considerations one has to remain in mind while designing the fields in the data base.
- Range control
- Null value control
- Referential integrity
- Trigger a report listing missing values
- Substitute an estimate of the missing value
- In programs, ignore missing data unless the value is significant.
Modify a sequence: ALTER SEQUENCE SEQSS INCREMENT 2 MAXVALUE 3000; Removing a sequence: DROP SEQUENCE SEQSS;
A collection of a same kind of entities is known as an Entity Set or entity type. Example: For the COLLEGE database defines earlier objects of concern are Students, Faculty,
prototype of a distributed information system for a national car part retail outlet chain.
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos
Define the Attribute Inheritance The attributes of a higher level entity set are inherited through a lower level entity set made by specialization-generalization hierarchy. Nam
Advantages of Observation Methods: Bailey has pointed out four advantages of observation: 1. Superior in Data Collection on Non Verbal Behavior: When a person a opi
Question: In a multi-user database environment, locking mechanisms can be used to solve the three basic problems of concurrency. On the other hand, however, locking may also le
List the steps for converting state diagram to the code. a) Finding major control path b) Finding the conditional statements c) Finding the loops d) Finding error ro
what is query processing?
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