Oracle 分组统计，按照天、月份周和自然周、月、季度和年

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做报表统计时会经常用到周，月，季度，年进行分组统计，所以结合网络搜索推荐的sql，总结如下：

-- 按天统计select to_char(t.CREATED+15/24, 'YYYY-MM-DD') as 天,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'group by to_char(t.CREATED+15/24, 'YYYY-MM-DD') --trunc(t.CREATED, 'DD')ORDER by 天 NULLS  LAST;

-- 按自然周的日期统计 select to_char(next_day(t.CREATED+15/24 - 7,2),'YYYY-MM-DD') AS 周,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'group by to_char(next_day(t.CREATED+15/24 - 7,2),'YYYY-MM-DD')ORDER BY 周;

-- 按自然周统计 select to_char(t.CREATED,'iw') AS 周,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'group by to_char(t.CREATED,'iw')ORDER BY 周;

-- 按自然月统计 select to_char(t.CREATED,'YYYY-MM') as 月份,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'GROUP BYto_char(t.CREATED,'YYYY-MM') -- to_char(t.CREATED+15/24,'yyyy-mm') 不大准确ORDER BY 月份;

-- 按季统计 select to_char(t.CREATED,'q') 季度,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'group by to_char(t.CREATED,'q')ORDER BY 季度 NULLS  LAST;

--按年统计 select to_char(t.CREATED,'yyyy') AS 年度,sum(1) as 数量from TB_EXT_TRADE tWHEREt.TID LIKE 'SC%' OR t.TID LIKE 'WSC%'group by to_char(t.CREATED,'yyyy')ORDER BY 年度;

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