Physical Database Design Which of the following improves a query's processing time? Combine a table with itself. Write complex queries. Query one query within another. Use compatible data types. Combine a table with itself. Write complex queries. Query one query within another. Use compatible data types. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Sequential retrieval on a primary key for sequential file storage has which of the following features? Very fast Impractical Slow Moderately fast Very fast Impractical Slow Moderately fast ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A secondary key is which of the following? Determines the tablespace required Nonunique key Primary key Useful for denormalization decisions Determines the tablespace required Nonunique key Primary key Useful for denormalization decisions ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following are integrity controls that a DBMS may support? Limit the use of null values in some fields. Limit the set of permissible values that a field may assume. All of these Assume a default value in a field unless a user enters a value for that field. Limit the use of null values in some fields. Limit the set of permissible values that a field may assume. All of these Assume a default value in a field unless a user enters a value for that field. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Denormalization and clustering can work well to minimize data access time for small records. True False True False ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A pointer is a detailed coding scheme recognized by system software for representing organizational data. False True False True ANSWER DOWNLOAD EXAMIANS APP
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