sql的强大

我知道sql的查询很复杂，也是很强大，但就没有见过如果强大的，让大家看一句我最近刚写的,就一句sql语句将总数，百分比都出来了！ select t.*, round(decode(nvl(all_count,0),0,0,send_count/all_count),3)*100 send_count_rate, round(decode(nvl(all_count,0),0,0,distribute_count/all_count),3)*100 distribute_count_rate, round(decode(nvl(all_count,0),0,0,success_count/all_count),3)*100 success_count_rate, round(decode(nvl(all_count,0),0,0,resend_count/all_count),3)*100 resend_count_rate, round(decode(nvl(all_count,0),0,0,failure_count/all_count),3)*100 failure_count_rate from ( select company_name, sum(case when process_state=1 or process_state=2 or process_state=3 or process_state=4 or process_state=5 then 1 else 0 end) all_count, sum(case when process_state=1 then 1 else 0 end) send_count, sum(case when process_state=2 then 1 else 0 end) distribute_count, sum(case when process_state=3 then 1 else 0 end) success_count, sum(case when process_state=4 then 1 else 0 end) [...]