查询
select id,
replace (salecom , substring(salecom,1,6) , '201002' )
salestyle,
pay
from biao
跟新
update biao
set salecom = replace (salecom , substring(salecom,1,6) , '201002' )
replace (salecom , substring(salecom,1,6) , '201002' )
改成
replace (salecom , substring(salecom,1,1) , '8' )就可以了