单项选择题
A.The modified data are not available on disk.
B.The modified data have been flushed out from memory.
C.The modified rows of the Certkiller STAFF table have been locked.
D.Jack has not committed the changes after modifying the value.
E.Both users are accessing the database from two different machines.
单项选择题 You work as a database administrator for Certkiller .com. As a result of performance analysis， you created an index on theprod_namecolumn of the Certkiller prodtable， which contains about ten thousand rows. Later， you updated a product name in the table. How does this change affect the index？（）
多项选择题 YouworkasadatabaseadministratorforCertkiller.com.YouhavesettheretentionperiodforAutomaticRepository（AWR）statisticstofourdaysandcollectionintervalto15minutes.YouwanttoviewthestatisticscollectedandstoredinAWRsnapshot.WhichtwomethodswouldyouusetoviewtheAWRstatistics？（）
单项选择题 You are working on the Certkiller database. What is the default name of the alert log file in this database？（）