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Write a program within embedded SQL to associative the total trip expenses of the salesman named ‘John' for the relations. EXEC SQL BEGIN DECLARE SECTION; long total_expenses;
Define what Immediate database modification technique uses? Ans: Both undo and redo.
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
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You are required to design and build a data mart/data warehouse using Oracle. A national bank allocates funding every year for its local branches to provide temporary staff cove
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
INSERT INTO command : Values can be inserted for all columns or for the selected columns Values can be given by sub query. In place of values parameter substitution
Difference between LEFT OUTER JOIN and RIGHT OUTER JOIN In left outer join tuples from the left-hand-side relation which do not match any tuple in the right-hand-side relation
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