select 'total_service' as total_service,'x_service' as x_service,'100' as percent,'1' as service_price,'name' as name,'d_id' as d_id,service_time from sell where sell.service_time>='2006-04-0 0:0:0' and sell.service_time<='2006-04-31 23:59:59' order by service_time

这句话是什么意思呢