单项选择题
You are designing an application for a telecom company and you have been asked to design a database table to facilitate monthly bill generation. The bill would include details of customer calls, listed in chronological order.
Which method would you follow to achieve this objective without increasing the overhead of sorting the rows?()
A.create a hash cluster to store the data
B.create an index cluster to store the data
C.create a partitioned table to store the data
D.create a sorted hash cluster to store the data
E.create a heap table with rowid to store the data
相关考题
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单项选择题
Inyourdatawarehousingapplication,yougeneratereportsfrequently.Thedataisstaticinthetablesbeingusedtogeneratereports.Youarecurrentlyusingjoins,resultinginalargeperformanceoverhead.Whatkindofdatabasestructurewouldyouusetoreducetheresponsetimeofthequery?()
A.hash clusters
B.index clusters
C.partitioned tables
D.indexorganized table (IOT) -
单项选择题
Whiledesigningyourdatabase,youhavecreatedtheEMPLOYEEStableasanindexorganizedtable(IOT).YouwanttocreateabitmapindexontheJOB_IDcolumntomakequeriesfaster.Whichtaskmusthavebeencompletedsothatyouareabletocreatethebitmapindex?()
A.A primary key must have been created.
B.A mapping table must have been created.
C.An overflow tablespace must have been specified.
D.The PCTTHRESHOLD option must have been specified. -
单项选择题
While designing the database for one of your online transaction processing (OLTP) applications, you want to achieve the following: a) high availability of data b) faster primary key access to the table data c) compact storage for the table Which type of tables would you use to achieve these objectives?()
A.heap tables
B.object tables
C.partitioned tables
D.indexorganized tables (IOTs)
