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By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
coventions for displaying an ER schema as ER diagram
Explain the systems development life cycle. This is the traditional method to develop, maintain, and replace information systems that contains the project identification and se
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
Explain in details about Data Sharing
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): Ans: The relational database schema f
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;
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