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Explain the Relational Completeness
Codd described the term relational completeness to consider to a language that is complete with respect to first-order predicate calculus except for the restrictions he proposed. Actually the restrictions have no unfavorable effect on the applicability of his relational algebra for database purposes.
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
Let consider the given partial relation EMP. Let us make some sub-queries for them EMPNO ENAME JOB SAL DEPTNO 7566
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
why are older data models are being replaced by new data models
What is an ER diagram? Why is it used in Database management system (DBMS)?
write a short note on participation role? Participation role: roles are indicating in E-R diagram by labelling the lines that connect diamonds to rectangles.
What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When
Which component is not included in database environment ? A users component is not included in database environment.
Recovery Techniques: After Reading the types of failures and database errors, let us talk about how to recover from the failures. Recovery can be complete using/restoring the previ
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