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The user SCOTT executes the following command successfully to increase the salary values in one of his sessions: 
SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20; 
Before SCOTT ends the transaction, user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data?()

A . because of redo data from redo log file
B . because of data from database buffer cache
C . because of data from a temporary tablespace
D . because of undo data from the undo tablespace

监理单位的监理能力和监理效果主要取决于:监理人员素质、专业配套能力、监理经历以及管理水平等。 请详述氯丙嗪的药理作用。 Which of the following cannot be translated from Classic Notes to XPages?() Embedded views。 Section。 Hide When Formula。 Frameset。 对景 The CIO of a research and technology company recently sent an email outlining his organization’s Information Technology plans for the next 12 to 18 months. He asked for proposals that satisfied the following requirements:   --Recommend an Opteron AMD server capable of running as a 3-way but can be upgraded to a 4-way server.   --Recommend a four (4) way Intel Dual core 3.5GHz Sever capable of being upgraded to a 16 way server.   What servers would you propose?() IBM x3755 and IBM x3850。 IBM x3650 and IBM LS41 Blade。 IBM x3655 and IBM x3650。 IBM x3755 and IBM x3950。

The user SCOTT executes the following command successfully to increase the salary values in one of his sessions: 
SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20; 
Before SCOTT ends the transaction, user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data?()

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