标题: 大家帮我看看这道题应该选哪一个？ [打印本页] 作者: chenfeng 时间: 2003-06-18 09:30 标题: 大家帮我看看这道题应该选哪一个？ Which statement about executing a Data Manipulation Language(DML)
SQL statement is true?
A.The data block is updated to record the new values of the data.
B.The Oracle server places shared locks on the rows that are to be modified.
C.The rollback segment records the after-image of the changes to the data block.
D.If the data and rollback blocks are not already in the buffer cache,Oracle will terminate the SQL statement.