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這篇文章主要講解了“oracle怎么實(shí)現(xiàn)按天,周,月,季度,年查詢排序”,文中的講解內(nèi)容簡單清晰,易于學(xué)習(xí)與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學(xué)習(xí)“oracle怎么實(shí)現(xiàn)按天,周,月,季度,年查詢排序”吧!
天--to_char(t.start_time,'YYYY-MM-DD')
周 --to_char(t.start_time,'YYYY'),to_char(t.start_time,'IW')
月度--to_char(t.start_time,'YYYY-MM')
季度--to_char(t.start_time,'YYYY'),to_char(t.start_time,'Q')
年度--to_char(t.start_time,'YYYY')
按天查詢
select to_char(t.start_time,'YYYY-MM-DD') day ,count(*) from test t
where to_char(t.start_time,'YYYY')='2019' --條件限制
group by to_char(t.start_time,'YYYY-MM-DD') --分組
order by to_char(t.start_time,'YYYY-MM-DD') --排序
按周查詢
select to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'IW'),count(*) from test t
where to_char(t.start_time,'YYYY')='2019' --條件限制
group by to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'IW')--分組
order by to_char(t.start_time,'YYYY') year,to_char(t.start_time,'IW') --排序
按月度查詢
select to_char(t.start_time,'YYYY-MM') ,count(*) from test t
where to_char(t.start_time,'YYYY')='2019' --條件限制
group by to_char(t.start_time,'YYYY-MM') --分組
order byto_char(t.start_time,'YYYY-MM') --排序
按季度查詢
select to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'Q'),count(*) from test t
where to_char(t.start_time,'YYYY')='2019' --條件限制
group by to_char(t.start_time,'YYYY') ,to_char(t.start_time,'Q')--分組
order byto_char(t.start_time,'YYYY') ,to_char(t.start_time,'Q')--排序
按年度查詢
select to_char(t.start_time,'YYYY') year ,count(*) from test t
where to_char(t.start_time,'YYYY')='2019' --條件限制
group by to_char(t.start_time,'YYYY') --分組
order by to_char(t.start_time,'YYYY') --排序
感謝各位的閱讀,以上就是“oracle怎么實(shí)現(xiàn)按天,周,月,季度,年查詢排序”的內(nèi)容了,經(jīng)過本文的學(xué)習(xí)后,相信大家對oracle怎么實(shí)現(xiàn)按天,周,月,季度,年查詢排序這一問題有了更深刻的體會,具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是億速云,小編將為大家推送更多相關(guān)知識點(diǎn)的文章,歡迎關(guān)注!
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