service_fee 字段定义:`service_fee` decimal(14,4) NULL DEFAULT NULL COMMENT '手续费金额,含税' ,
1)round(sum(service_fee),2)
2) cast(round(sum(service_fee),2) as char)
service_fee 字段定义:`service_fee` decimal(14,4) NULL DEFAULT NULL COMMENT '手续费金额,含税' ,
1)round(sum(service_fee),2)
2) cast(round(sum(service_fee),2) as char)