Oracle 甲骨文SQLPLUS逃逸&；性格

正如我在oracle文档中发现的

SET ESCAPE:
 Defines an escape character you can use before the substitution character. The escape character instructs SQL*Plus to treat the substitution character as an ordinary character rather than as a request for variable substitution. The default escape character is a backslash (\).

SET DEFINE:
 Defines the substitution character (by default the ampersand "&") and turns substitution on and off.

在我提问之前，我应该这样做吗

SET DEFINE off
select 'A&B' from dual;
SET DEFINE on

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在我的情况下是否需要使用set escape on？

通过设置define off，您已经关闭了替换变量检测。因此，不，在这种情况下，您不需要逃避符号。谢谢@Boneist:）