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1 how do relational query optimizers work2 what information does a relational query optimizer use in making its
1 how do you construct a join operation in an sql select statement2 what is a subquery in an sql select statement3
1 describe the purpose of the group by clause why must the attribute in the group by clause also appear in the select
consider the general hardware relational database shown in figure 719a write an sql command to create the customer
1 describe the data normalization process including its specific steps why is it referred to as a
1 how can data normalization be used to check the results of the e-r diagram-to-relational database conversion process2
1 what is the definition of data in second normal form2 what is a transitive dependency3 what is the rule for
1 what characterizes unnormalized data why is such data problematic2 what characterizes tables in first normal form why
1 what is logical database design2 what is physical database design and how does it relate to logical database design3
the state of new york certifies firefighters throughout the state and must keep track of all of them as well as of the
1 describe the concept of the ternary relationship2 how is a ternary relationship constructed in a relational database3
1 describe the concept of the unary one-to-many relationship2 how is a unary one-to-many relationship constructed in a
super baseball league consider the following relational database for the super baseball league it keeps track of teams
a fixed disk has 80 cylinders the tracks in each cylinder are numbered 0-11 the upper surface of the topmost platter
1 explain the statement lsquolsquosome physical database design techniques change the logical design and some do not2
1 describe the characteristics of the applications that must be considered as inputs to the physical database design
1 describe how response time requirements and throughput requirements determine the overall performance level of the
1 why does the degree to which data is dispersed over a disk affect application and database performance2 explain why
1 what is physical database design2 describe why physical database design is necessary3 explain why the need to perform
answer the following general questions about indexesa can an index be built over a non-unique fieldb can an index be
1 describe the idea of the hashed file what are its advantages and disadvantages in comparison to indexes2 describe how
1 describe the idea of the simple linear index what are its shortcomings2 what is an indexed-sequential file3 describe
1 why is it important to store files on a cylinder-bycylinder basis2 describe the four steps in the transfer of data
1 what is a lsquolsquoview which factors affecting application and database performance can be dealt with by using
1 discuss database administrations role in performance monitoring and troubleshooting2 how do database administrations