试题详情
- 单项选择题在SQL*PLUS环境中可以利用DBMS_OUTPUT包中的PUT_LINE方法来回显服务器端变量的值，但在此之前要利用一个命令打开服务器的回显功能，这一命令是（）
A、set server on
B、set serverecho on
C、set servershow on
D、set serveroutput on
E、set serverdisplay on
- D
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