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Define DBA database administrator?
DBA: A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. In common, these involves:
Recoverability - Creating and testing Backups Integrity - Verifying or helping to verify data integrity Security - Defining and/or implementing access controls to the data Availability - Ensuring maximum uptime Performance - Ensuring maximum performance Development and testing support - Helping programmers and engineers to economically utilize the database
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
Explain the EXEC statement in SQL Ans: All statements which start with EXEC SQL are embedded SQL database statements. High level languages such as C can be employed to write a
Define in which normalisation form if an attribute of a composite key is dependent on an attribute of other composite key. Ans: 3NF A relation is in 3 NF if an attribute of
Define outer union operation of the relational algebra. Compute the outer union for the relations R and S given below. Outer Join - If there are any values in one tabl
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
We face problem of stock Opening balance and closing balance in Minus
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
Attributes and its types explain?
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