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Make SQL statements for the following scenarios. Your response should contain SQL statement, output and any other assumptions you have made to arrive at the answer.For Colorado customers compute the average amount of their orders and the number of orders placed. The result should contain the customer number, customer last name, average order amount and the number of orders placed. Query:
selectc.CUSTFIRSTNAME, c.CUSTLASTNAME, avg(p.PRODPRICE), count(ol.ORDNO) from customer c,ordertblot,ordlineol,product p where c.custno=ot.custno and ot.ordno=ol.ordno and p.PRODNO=ol.PRODNO group by c.CUSTFIRSTNAME,c.CUSTLASTNAME;
What is a recovery scheme? An integral part of a database system is a recovery scheme that can restore the database to the reliable state that existed before the failure.
Example : Create a sequence named SEQSS that starts at 105, has a step of 1 and can take maximum value as 2000. CREATE SEQUENCE SEQSS START WITH 105 INCREMENT BY 1 MAX VA
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Describe DROP TABLE command of SQL along with both the options - CASCADE and RESTRICT. DROP TABLE command - This command drops the specified table. Dropping a table also dro
. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan Gurukul Company that provide better security also design a data abstraction
Describe the storage structure of indexed sequential files and their access method. Ans: Index offers a lookup capability to rapidly reach the vicinity of the desired record.
explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
How does Tuple-oriented relational calculus vary from domain-oriented relational calculus? The tuple-oriented calculus uses a tuple variables i.e., variable whose only allowed
State the process of Rearranging Classes and Operations The various, yet similar operation of different classes can be slightly modified thus that they can be covered by a sin
Speedup Query Processing: A query that includes data at various sites can be split into sub-queries. These sub- queries can be implemented in parallel by various sites. Such parall
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