Which of the following statements is true regarding the initialization parameter DIAGNOSTIC_DEST?
A.The default value is the value of the environment variable $ORACLE_HOME; if $ORACLE_HOME isn't set, then the default is set to $ORACLE_BASE.
B. The default value is the value of the environment variable $ORACLE_BASE; if $ORACLE_BASE isn't set,then it is set to $ORACLE_HOME.
C. DIAGNOSTIC_DEST is always equal to $ORACLE_HOME.
D. DIAGNOSTIC_DEST is always equal to $ORACLE_BASE.
When $ORACLE_BASE is set,it is the default value for DIAGNOSTIC_DEST.
本文探讨了Oracle数据库中初始化参数DIAGNOSTIC_DEST的默认值设定规则,当$ORACLE_BASE设置时,它将作为DIAGNOSTIC_DEST的默认值,若未设置,则会回退到$ORACLE_HOME。
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