摘要：
//查询sys_username以S.00655开头的用户SELECT SUBSTRING(sys_username,3),sys_password FROM `tbl_sa_syslogin` where sys_username like 'S.%'; //修改S.00655用户的密码等于S码update tbl_sa_syslogin set sys_password = SUBSTRING(sys_username,3) where sys_username like 'S.%'; *///建立一个中间导出表create table tbl_export 阅读全文