1。set feedback
有三种方式：
set feedback on
set feedback off
set feedback n
默认的当一条sql发出的时候，oracle会给一个反馈，比如说创建表的时候，如果成功，命令行会返回类似：Table created的反馈，又比如执行一个pl/sql成功的时候，命令行会返回：PL/SQL procedure successfully completed 。当载脚本中运行很多语句的时候，一般将feedback设为off。
set feedback n:当一条sql语句返回n或者大于n行记录的时候，就会有feedback,比如：set feedback 5,当返回记录等于或多于5行的时候会有类似8 rows selected.的反馈.如果返回行少于5则没有此反馈。
2。set termout
有两种形式：
set termout on
set termout off
当设置为set termout off的时候就会忽略sql语句的输出如果这条sql是在脚本中运行的话。也就是说如果命令不在脚本中运行，即使设置为set termout off，仍然会返回sql的结果。
3。set heading
有两种形式：
set heading on
set heading off
Setting the heading specifies whether column headings (names) are printed or not.
设置为set heading off的时候不显示列标题。
工作中遇见，记录一下
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