Oracle数据库按月统计SELECT TO_CHAR(ds.date_time,'YYYY-MM'),count(*)

FROM tab_name ds

GROUP BY TO_CHAR(ds.date_time,'YYYY-MM')

ORDER BY TO_CHAR(ds.date_time,'YYYY-MM')Oracle数据库按年统计SELECT TO_CHAR(ds.date_time,'YYYY'),count(*)

FROM tab_name ds

GROUP BY TO_CHAR(ds.date_time,'YYYY')

ORDER BY TO_CHAR(ds.date_time,'YYYY') ASC NULLS LASTOracle数据库按旬统计--查询上旬

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'上旬',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='01' and TO_CHAR(ds.date_time,'DD')< '11'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询统计中旬

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'中旬',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='11' and TO_CHAR(ds.date_time,'DD')< '21'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询条件下旬

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'下旬',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='21'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')Oracle数据库按候统计(气象中,五天为1候,1年72候.1个月为6候.如果1个月为31天,则最后1候为6天.)--查询1候

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'1',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='01' and TO_CHAR(ds.date_time,'DD')< '06'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询统计1候

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'2',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='06' and TO_CHAR(ds.date_time,'DD')< '11'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询统计3候

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'3',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='11' and TO_CHAR(ds.date_time,'DD')< '16'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询统计4候

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'4',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='16' and TO_CHAR(ds.date_time,'DD')< '21'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询统计5候

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'5',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='21' and TO_CHAR(ds.date_time,'DD')< '26'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')

--查询条件6候

union

SELECT TO_CHAR(ds.date_time,'YYYYMM'),'6',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'DD')>='26'

GROUP BY TO_CHAR(ds.date_time,'YYYYMM')Oracle数据库按季统计--查询春季

SELECT TO_CHAR(ds.date_time,'YYYY'),'春季',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'MM')>='03' and TO_CHAR(ds.date_time,'MM')< '06'

GROUP BY TO_CHAR(ds.date_time,'YYYY')

--查询统计夏季

union

SELECT TO_CHAR(ds.date_time,'YYYY'),'夏季',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'MM')>='06' and TO_CHAR(ds.date_time,'MM')< '09'

GROUP BY TO_CHAR(ds.date_time,'YYYY')

--查询统计秋季

union

SELECT TO_CHAR(ds.date_time,'YYYY'),'秋季',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'MM')>='09' and TO_CHAR(ds.date_time,'MM')< '12'

GROUP BY TO_CHAR(ds.date_time,'YYYY')

--查询统计冬季

union

SELECT TO_CHAR(ds.date_time,'YYYY'),'冬季',count(*)

FROM tab_name ds

where TO_CHAR(ds.date_time,'MM')>='12' or TO_CHAR(ds.date_time,'MM')< '03'

GROUP BY TO_CHAR(ds.date_time,'YYYY')http://blog..net/qq_16645423