RT
表名:A
時間字段:ddatetime(datetime類型)
查詢2003-2004年6月7日-7月8日數(shù)據(jù)。
1
select * from A where (extract(year from ddatetime) between 2003 and 2004)
2and (extract(month from ddatetime) between 6 and 7)
3and (extract(day from ddatetime) between 6 and 7)
extract只能取到日。小時，或者到秒，需要to_char。
查詢2003-2004年6月7日-7月8日12時到20時數(shù)據(jù)。
1select * from A where (extract(year from ddatetime) between 2003 and 2004)
2and (extract(month from ddatetime) between 6 and 7)
3and (extract(day from ddatetime) between 6 and 7) and (to_char(ddatetime,'HH24') between 12 and 20)
以上查詢在oracle可運行。
posted on 2009-01-18 14:12
rapin 閱讀(2928)
評論(4) 編輯 收藏 所屬分類:
數(shù)據(jù)庫