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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 are the disadvantages of relational data ? Disadvantages • Performance - If the number of tables among that relationships to be established are large and the tables t
Define upgrade and downgrade? It gives a mechanism for conversion from shared lock to exclusive lock is called as upgrade. It gives a mechanism for conversion from exclusive
What function divides one numeric expression by another and returns the remainder? MOD function divides one numeric expression by another and returns the remainder.
Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke
Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.
What are the functions of an accumulator? The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It hol
Consider a bank that has a collection of sites, each running a database system. Suppose the only way the databases interact is by electronic transfer of money between one another,
Example RELATION SCHEMA for STUDENT: STUDENT (Roll No: string, name: string, login: string, age: integer) RELATION INSTANCE
please give me introduction to full data in D B M S in a short assignment
How does the two phase protocol ensure serializability in database schedules? Ans: A transaction is termed to follow the two-phase locking protocol if all locking operations
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