SQL replace的使用

需要修改表myTable表的myField字段的前缀，前缀都是"furong......."

前缀：
update myTable set myField = replace(myField,'furong','lotus') where myField like 'furong%'

同理：
中间：
update myTable set myField = replace(myField,'furong','lotus') where myField like '%[furong]%'

后缀：
update myTable set myField = replace(myField,'furong','lotus') where myField like '%furong'