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Describe the responsibilities of the DBA and the database designer ?
The responsibilities of DBA and database designer are:1. Planning for the database's future storage needs2. Describing database availability and fault management architecture3. Defining and forming environments for development and latest release installation4. Creating physical database storage structures after developers have designed an application5. Constructing the database6. Determining and setting the physical and size locations of data files7. Evaluating latest hardware and software purchase8. Researching, testing, and recommending tools for Oracle development, database administration, modeling, and backup and recovery implementation, as well as planning for the future9. Giving database design and implementation 10.Understanding and employing the optimal flexible architecture to ease administration, permit flexibility within managing I/O, and to increase the capability to scale the system
List the internal controls that should be in effect solely because a EDP system is employed, classifing them as (1) Those controls pertaining to input of information and (2) All ot
Explain the Check Clause The CHECK clause is employed to at the end of a CREATE TABLE statement specify table constraints. This is known as table-based constraint because it ap
Whta is the advantage of the database management approach? The advantage of the database management approach is data is integrated and can be accessed by multiple programs.
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
Define tuple variable? Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.
What is the difference between a HAVING CLAUSE and a WHERE CLAUSE? HAVING CLAUSE - HAVING CLAUSE is used only with SELECT statement. - It is normally used in a GROUP BY
Define hot swapping? Hot swapping permits the removal of faulty disks and changes it by new ones without turning power off. Hot swapping decreases the mean time to repair.
Un-Normalized Form (UNF) If a table having non-atomic values at every row, it is said to be in UNF. An atomic value is something that cannot be further decomposed. A non-atomic
Explain three main attributes of data.
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