Question

我正在尝试通过知道列中的日期包含日期和时间来从表中检索记录。

假设我有一个名为t1的表，其中只包含两列name和date。

存储在列日期中的数据，如8/3/2010 12:34:20 PM。

我想通过此查询检索此记录（例如，我没有花时间）：

Select * From t1 Where date="8/3/2010"

这个查询什么都没给我！

如何在没有时间的情况下只知道date来检索date？

Answer 1

DATE是Oracle中的保留关键字，因此我使用的是列名your_date。

如果您在your_date上有索引，我会使用

WHERE your_date >= TO_DATE('2010-08-03', 'YYYY-MM-DD')
  AND your_date <  TO_DATE('2010-08-04', 'YYYY-MM-DD')

或BETWEEN：

WHERE your_date BETWEEN TO_DATE('2010-08-03', 'YYYY-MM-DD')
                    AND TO_DATE('2010-08-03 23:59:59', 'YYYY-MM-DD HH24:MI:SS')

如果没有索引或记录没有太多

WHERE TRUNC(your_date) = TO_DATE('2010-08-03', 'YYYY-MM-DD')

应该足够了。不带参数的TRUNC会从DATE中删除小时，分钟和秒。

如果效果非常重要，请考虑在该列上添加Function Based Index：

CREATE INDEX trunc_date_idx ON t1(TRUNC(your_date));

Answer 2

就个人而言，我通常会选择：

select * 
from   t1
where  date between trunc( :somedate )          -- 00:00:00
            and     trunc( :somedate ) + .99999 -- 23:59:59

Answer 3

将日期列转换为正确的格式并进行比较：

SELECT * From my_table WHERE to_char(my_table.my_date_col,'MM/dd/yyyy') = '8/3/2010'

这部分

to_char(my_table.my_date_col,'MM/dd/yyyy')

将导致字符串'8/3/2010'

Answer 4

您可以使用between函数获取2010-08-03 00：00：00：000 AND 2010-08-03 23：59：59：000

之间的所有记录

Answer 5

尝试以下方式。

Select * from t1 where date(col_name)="8/3/2010"

Answer 6

structure(list(year = c(2015, 2014, 2012, 2003, 1991, 1987, 1977, 1975, 1968, 1965, 2016, 2015, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1991, 1990, 1988, 1986, 1985, 1983, 1982, 1980, 1978, 1975, 1973, 1968, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1995, 1994, 1993, 1992, 1991, 1990, 1987, 1986, 1985, 1984, 1983, 1981, 1973, 1972, 1971, 1970, 1969, 1968, 1967, 1964, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1987, 1986, 1985, 1983, 1980, 1979, 1978, 1976, 1973, 1972, 1971, 1967, 1965, 1962, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1991, 1988, 1986, 1983, 1982, 1980, 1978, 1975, 1973, 1968, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2000, 1999, 1998, 1997, 1996, 1995, 1991, 1990, 1983, 1979, 1976, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2002, 2001, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1988, 1986, 1983, 1982, 1980, 1978, 1975, 1973, 1968, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2006, 2005, 2004, 2003, 2001, 2000, 1999, 1998, 1996, 1995, 1994, 1988, 1986, 1985, 1984, 1983, 1975, 1973, 1968, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, 2006, 2005, 2004, 2002, 2001, 2000, 1998, 1997, 1996, 1995, 1994, 1991, 1988, 1986, 1983, 1982, 1978, 1977, 1975, 1973, 1968, 2016, 2015, 2014, 2012, 2009, 2004, 2003, 2002, 2001, 1999, 1998, 1997, 1995, 1993, 1992, 1987, 1985, 1979, 1965, 1964, 2015, 2014, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1992, 1991, 1990, 1988, 1986, 1985, 1984, 1983, 1982, 1981, 1980, 1979, 1978, 1976, 1975, 1974, 1973, 1968, 1967, 1963, 1961, 2016, 2015, 2012, 2009, 2004, 2002, 2001, 1999, 1998, 1993, 1992, 1990, 1987, 1985, 1979, 1965, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2006, 2005, 2004, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1991, 1988, 1986, 1985, 1984, 1983, 1976, 1975, 1973, 1968, 1961, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1986, 1983, 1982, 1980, 1979, 1977, 1976, 1975, 1973, 1968, 1961, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, 2006, 2005, 2004, 2001, 2000, 1998, 1996, 1995, 1994, 1988, 1986, 1983, 1978, 1975, 1973, 1968, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987, 1986, 1985, 1983, 1981, 1980, 1979, 1978, 1973, 1972, 1970, 1969, 1968, 1967, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2002, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1991, 1989, 1988, 1986, 1983, 1982, 1978, 1976, 1975, 1973, 1969, 1968, 1967, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, 2006, 2005, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1992, 1991, 1990, 1988, 1986, 1984, 1983, 1975, 1973, 1968, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987, 1986, 1985, 1984, 1983, 1982, 1981, 1980, 1978, 1977, 1976, 1975, 1973, 1972, 1970, 1969, 1968, 1967, 1966, 2016), theme = structure(c(2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 11L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 12L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 13L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 14L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 17L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L), .Label = c("ALL", "AB", "BB", "BS", "CS", "DS", "EG", "FB", "GB", "KB", "KS", "LS", "LP", "MC", "NB", "NW", "SB", "SH", "VM", "WH"), class = "factor"), count = c(1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 6, 7, 2, 3, 7, 1, 5, 7, 2, 2, 2, 2, 5, 2, 3, 3, 2, 2, 1, 4, 1, 2, 3, 1, 1, 2, 1, 1, 1, 1, 1, 3, 12, 4, 5, 11, 4, 8, 8, 9, 4, 5, 9, 6, 10, 6, 8, 7, 7, 6, 2, 3, 2, 2, 2, 1, 3, 2, 1, 3, 1, 3, 1, 1, 2, 2, 3, 1, 1, 3, 2, 6, 9, 6, 4, 6, 3, 1, 4, 6, 2, 5, 5, 4, 2, 2, 5, 7, 4, 4, 3, 1, 3, 4, 1, 1, 1, 3, 1, 2, 2, 4, 2, 2, 2, 1, 1, 2, 1, 1, 1, 4, 6, 2, 1, 4, 3, 4, 3, 7, 1, 4, 4, 2, 1, 3, 2, 3, 1, 2, 4, 2, 2, 2, 1, 1, 2, 1, 2, 1, 1, 4, 12, 1, 11, 11, 6, 7, 8, 9, 4, 5, 8, 4, 1, 1, 5, 1, 2, 1, 3, 3, 1, 1, 1, 1, 1, 8, 7, 3, 3, 3, 1, 6, 2, 7, 1, 4, 3, 2, 1, 1, 1, 2, 2, 1, 4, 1, 1, 2, 3, 3, 3, 3, 1, 1, 2, 1, 1, 1, 1, 4, 6, 1, 1, 3, 3, 2, 2, 4, 3, 4, 3, 1, 1, 2, 1, 2, 1, 2, 1, 1, 3, 1, 1, 2, 1, 1, 1, 2, 4, 1, 2, 1, 2, 2, 7, 2, 2, 1, 2, 2, 2, 3, 1, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 3, 1, 2, 1, 1, 1, 1, 2, 2, 4, 1, 1, 2, 1, 1, 1, 1, 1, 2, 6, 1, 3, 3, 3, 2, 8, 2, 4, 5, 3, 1, 3, 4, 8, 2, 6, 2, 4, 4, 2, 1, 2, 4, 2, 4, 3, 2, 3, 3, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 4, 3, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 4, 1, 2, 2, 2, 2, 1, 4, 3, 3, 2, 2, 3, 2, 3, 1, 1, 2, 1, 2, 2, 4, 1, 2, 2, 1, 1, 1, 1, 1, 3, 7, 2, 4, 3, 3, 2, 6, 1, 4, 4, 3, 1, 1, 1, 3, 2, 4, 1, 2, 2, 3, 3, 2, 2, 2, 1, 3, 3, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 4, 1, 2, 1, 2, 1, 5, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 14, 7, 5, 8, 9, 7, 10, 14, 6, 11, 6, 6, 3, 5, 6, 7, 3, 5, 1, 3, 4, 3, 6, 3, 5, 3, 3, 4, 1, 2, 1, 2, 1, 3, 1, 1, 2, 1, 1, 1, 2, 4, 6, 7, 2, 5, 6, 4, 9, 3, 10, 1, 4, 4, 2, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 4, 1, 1, 1, 1, 2, 1, 1, 2, 1, 2, 4, 1, 2, 1, 1, 2, 3, 2, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 2, 1, 1, 2, 3, 2, 1, 1, 1, 1, 1, 11, 5, 12, 6, 9, 15, 9, 13, 7, 10, 7, 8, 2, 8, 2, 5, 5, 7, 8, 6, 6, 5, 2, 4, 7, 8, 1, 6, 2, 6, 6, 2, 2, 5, 5, 1, 1, 3, 2, 3, 2, 1, 1, 1, 2, 1, 1, 11)), .Names = c("year", "theme", "count"), row.names = 58:654, class = "data.frame")将为您提供日期，而不是Oracle中的时间。

Answer 7

只需使用以下一项：

select * from t1 where to_date(date_column)='8/3/2010'

只知道没有时间的日期从表中选择（ORACLE）

7 个答案: