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Using Literal Character String
Example:
To print IS A as one string with column name employee
SELECT ENAME || ' IS A ' || JOB AS "EMPLOYEE" FROM EMP;
What is meant by normalization of data? It is a process of examining the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the prop
projects?
Give the two reasons for allowing concurrency
Explain natural join? Natural Join - Similar as equi-join except in which the join attributes (having similar names) are not involved in the resulting relation. Only one sets
Briefly explain each of the following database terms. Use no more than 2-3 lines for each term. 1. DBMS 2. Update Anomaly 3. Alias (referring to tables in SQL queries)
What is Cardinality Ratio? Cardinality Ratios - The cardinality ratios for relationship kinds specifies the maximum number of relationship instances in which an entity can pa
What are composite attributes? Composite attributes can be separated in to sub parts.
Lossless-Join Decomposition Let us show an intuitive decomposition of a relation. We require a better basis for deciding decompositions since intuition may not always be r
Reflects organisational structure: Many organizations are distributed over various locations. If an organisation has many offices in dissimilar cities, databases used in such an ap
What is Thread splitting A thread of control is a path by which a set of state diagrams on that a single object is active at a time. Objects are shared between threads
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