按天统计

SELECT TO_CHAR(T.create_time,'YYYY-MM-DD') TIME,COUNT(*) COUNT FROM test T GROUP BY TO_CHAR(T.create_time,'YYYY-MM-DD') ORDER BY TO_CHAR(T.create_time,'YYYY-MM-DD') ASC NULLS LAST

按周统计

SELECT TO_CHAR(T.create_time,'YYYY') YEAR,TO_CHAR(T.create_time,'IW') TIME,'IW'),TO_CHAR(T.trade_time,'YYYY') ORDER BY TO_CHAR(T.create_time,'YYYY'),'IW') ASC NULLS LAST

按月统计

SELECT TO_CHAR(T.create_time,'YYYY-MM') TIME,'YYYY-MM') ORDER BY TO_CHAR(T.create_time,'YYYY-MM') ASC NULLS LAST

按季度统计

SELECT TO_CHAR(T.create_time,'Q') TIME,'Q'),'Q') ASC NULLS LAST

按年统计

SELECT TO_CHAR(T.create_time,'YYYY') ASC NULLS LAST

注：create_time为表TEST里的创建时间字段，时间类型 以上代码可直接在数据库里运行