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Create Student DB and perform delete operation?
STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, course#, semester, year, instructor) GRADE_REPORT (student#, section identifier, grade) PREREQUISITE (course#, presequisite#)
Delete the record for the student whose name is ‘Smith' and whose student number is 17.
Query
DELETE FROM STUDENT WHERE NAME = ‘Smith' AND STUDENT# = 17
why three level architecture had been developed/
What are the Overlapping elements Overlapping elements can be found by scanning all the elements in front of deleted element in priority list for the sheet and comparing them
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sql is relationally complete-justify
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What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What are the key features of Oracle? Key features of Oracle are as follows: • Read Consistency • Concurrency • Locking Mechanisms • Quiesce Database • RAC • Portability
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