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Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
Express types of information available in MySQL? Information as regards the result of queries: This includes number of records affected by any SELECT or UPDATE or DELETE st
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
Create Student DB and perform delete operation? STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, co
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
does tables are called relations
Can we delete data element, which is being used by table fields. No we cant delete data element.
Objectives After reading this unit you should be able to: Explain storage of databases on hard disks; Discuss the execution of various file Organisation techniques;
Is it mandatory to declare all the tables in Report by the key word tables for all the tables that exist in the structure of LDB, and are being explained in the Database part of LD
Describe the various types of Online Analytical Processing (OLAP) tools and briefly discuss how the support common analytical operations.
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