\0    ASCII 0 (NUL ) 字符
\'  ASCII 39 单引号 (“'” ) 字符
\"  ASCII 34 双引号 (“"” ) 字符
\b    ASCII 8 退格符
\n    ASCII 10 换行符
\r    ASCII 13 回车符
\t    ASCII 9 制表符(TAB )

查询字段是否存在tab制表符：
select * from crm_special_link t where instr(t.link_number,chr(9))>0

替换空格、tab制表符：
update crm_special_link set link_number = replace(link_number,' ','');
update crm_special_link set link_type = replace(link_type,' ','');
update crm_special_link set link_number = replace(link_number,chr(9),'');