标签:eve left join check rac group by ring str order by dual
--String 类型 转化为 年月日 yyyy-mm-dd to_date(substr(t.submit_time,1,10)))
如果统计一年 需要用 left join
(select level mymonth from dual
connect by level<13) n
left join (
select extract(month from to_date(v.CHECK_TIME,‘yyyy-mm-dd hh24:mi:ss‘)) as tmonths from table_name v
group by extract(month from to_date(v.CHECK_TIME,‘yyyy-mm-dd hh24:mi:ss‘))
ORDER BY tmonths ) m on m.tmonths =n.mymonth
标签:eve left join check rac group by ring str order by dual
原文地址:https://www.cnblogs.com/xkoko/p/9377658.html