Question
In: Computer Science
5) Name the data model that is only used to document a database design. 6) State...
5) Name the data model that is only used to document a database design.
6) State the most important characteristics regarding the output of any relational algebra operation.
7) Name the software system that permits the data in a distributed database to be transparent to others.
8) Use two words to distinguish a file based system and a database.
Solutions
Expert Solution
5) Name the data model that is only used to document a database design.
Answer:-
- The data model that is only used to document a database design is Entity Relationship Model (ER Model).
- A relational model is used for sorting data in the table with each relation.
6) State the most important characteristics regarding the output of any relational algebra operation.
Answer:-
- The relational algebra operations is performed on a table of one or even more tables of relational.
- Whatever the produced table is it will have the relational model properties.
- It is said that it shall produce another table called as relational table.
7) Name the software system that permits the data in a distributed database to be transparent to others.
Answer:-
- Distributed Database Management System .
- It is the software that permits the data in distributed database to be transparent to others .
- It is also know as distributed DBMS.
8) Use two words to distinguish a file based system and a database.
Answer:-
- Data consistency-
File based system can not provide it but DBMS database can provide it easily using normalization.
- Data access -
Database has you can say flexible access to data normally calles as Queries whereas file based system is allowed only some pre- determined access that is program which is compiled.
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