半小时分组统计个数sql
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group by 最后一个时间是多少按多少分组
select count(1), trunc(a.refund_insert_time, \'hh24\')
+ case when to_char(refund_insert_time,\'mi\') >= \'30\' then numtodsinterval(30,\'minute\') else numtodsinterval(0,\'minute\') end
from refund_record a
where a.refund_complete_time < sysdate - 1
group by trunc(a.refund_insert_time, \'hh24\')
+ case when to_char(refund_insert_time,\'mi\') >= \'30\' then numtodsinterval(30,\'minute\') else numtodsinterval(0,\'minute\') end;
select count(1), trunc(a.refund_insert_time, \'hh24\')
+ case when to_char(refund_insert_time,\'mi\') >= \'50\' then numtodsinterval(50,\'minute\')
when to_char(refund_insert_time,\'mi\') >= \'30\' then numtodsinterval(30,\'minute\')
else numtodsinterval(0,\'minute\') end
from refund_record a
where a.refund_complete_time < sysdate - 1 and to_char(refund_insert_time,\'yyyy-MM-dd hh24\')=\'2016-07-07 09\'
group by trunc(a.refund_insert_time, \'hh24\')
+ case when to_char(refund_insert_time,\'mi\') >= \'50\' then numtodsinterval(50,\'minute\')
when to_char(refund_insert_time,\'mi\') >= \'30\' then numtodsinterval(30,\'minute\')
else numtodsinterval(0,\'minute\') end;
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