--清空两个字符中间的空格
update IMPORT_TEST a set a.name = REGEXP_REPLACE(a.name,‘( ){1,}‘, ‘‘) where a.reason is not null
--字符串替换
update IMPORT_TEST a set a.name = replace(a.name,‘?‘, ‘‘) where a.reason is not null
原文：http://www.cnblogs.com/nan993/p/7479770.html