单项选择题

A.create a hash cluster to store the dataB.create an in……

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

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热门试题

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）

多项选择题View the Exhibit and examine the properties of the USERS tablespace. You execute the following statement to shrink the TRANS table existing on the USERS tablespace： SQL> ALTER TABLE trans SHRINK SPACE CASCADE Which objects would be affected by this command？（）

A.the TRANS table
B.the B*Tree indexes on the TRANS table
C.the materialized views log of the TRANS table
D.the materialized views based on the TRANS table
E.the large object （LOB） segments of the TRANS table

单项选择题View the Exhibit and examine the properties of the TT tablespace. Using Database Control， you have scheduled a job to shrink the TRANS table residing on the TT tablespace. The job would run at 5：00 p.m. every Friday. When you examine the space usage of the table after the completion of the job， you find that the table has not been shrunk. What could have been the reason for this？（）

A.The tablespace that contains the TRANS table is online.
B.The tablespace that contains the TRANS table is permanent.
C.The tablespace that contains the TRANS table is locally managed.
D.The segment space management of the tablespace that contains the TRANS table is manual in nature.