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Explain the term- Query.
Queries are used to repossess and show specific records in a table. They can also be used to show specific fields of specific records, which meet the condition specified. A query displays a subset of all or exact fields and records in a table. When a change is made to the data, which is shown by the query, this change is reflected in the table also. Because of this dynamic relationship among the query and the tables, the subset of the data displayed by the query is called a Dynaset.
properties of derirable decomposition
Hardware failure : Hardware failures are the failures when some disk or hardware chip fails. This may result in loss of data. One such trouble can be that a disk gets damaged and
One-way Associations If an association is only traversed in single direction, then it is known as one-way association. It is implemented as a pointer or an attribute which con
While sorting field groups we cannot use more than one key field False.
a project based on normalization with first, second and third normalization. There need to be a diagram also
Example: RELATIONAL SCHEMA for PERSON: PERSON (PERSON_ID: integer, NAME: string, AGE: integer, ADDRESS: String) RELATION INSTANCE In this instance, m = 3 and n = 4
Write short notes on transaction state? A transaction may not always complete its implementation successfully such a transaction is termed aborted A transaction must be in o
Describe the four main ways of optimising disk block access. Ans: a. Disk b. Non-volatile writes buffers c. File organization (Clustering) d. Log-based file system
1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict
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