select chr(92)||chr(102) from dual; \f select chr(92)||chr(110) from dual; \n select chr(92)||chr(114) from dual; \r select chr(92)||chr(116) from dual; \t select chr(92)||chr(118) from dual; \v
\b 退格符(Backspace) 0x08 \f 换页符(Form Feed) 0x0c \n 换行符(Line Feed) 0x0a \r 回车符(Carriage Return) 0x0d \t 水平制表符(Horizontal Tab) 0x09 \v 垂直制表符(Vertical Tab) 0x0b
char(13) 回车 char(10) 换行
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