我有这样的表
create table tbl_1(
year int,
month int,
day int
)
insert into tbl_1 values(2009, 11, 30)
insert into tbl_1 values(2010, 3, 4)
insert into tbl_1 values(2011, 5, 13)
insert into tbl_1 values(20011, 12, 24)
我想删除2009-11-30至2011-5-13的日期,但我不能,因为所有列都是int,我不能使用此查询:
delete from tbl_1
where year >=2009
and year<=2011
and month >=11
and month <=5
and day >=30
and day <=13
..因为:1&lt;月份&lt; 12和1&lt;一天&lt; 30
我知道这是一个可怕的错误。
我有很多表使用这种方式保存日期,请帮助我,我没有时间删除并重新创建所有这些。
答案 0 :(得分:7)
你可以这样做:
DELETE FROM tbl_1
WHERE (year * 10000 + month * 100 + day) BETWEEN 20091130 AND 20110513
我没有测试过这个。我建议先在测试系统上测试它,然后再在生产数据上运行,这样就不会意外删除错误的数据。
答案 1 :(得分:4)
在MySQL
和PostgreSQL
:
DELETE
FROM tbl_1
WHERE (2009, 11, 30) <= (year, month, date)
AND (year, month, date) <= (2011, 5, 13)
在PostgreSQL
中你甚至可以这样做:
DELETE
FROM tbl_1
WHERE (year, month, date) BETWEEN (2009, 11, 30) AND (2011, 5, 13)
答案 2 :(得分:3)
只需使用更多布尔运算符:
DELETE FROM tbl_1
WHERE (year = 2009 AND (month > 11 OR (month = 11 AND day >= 30)))
OR year = 2010
OR (year = 2011 AND (month < 5 OR (month = 5 AND day <= 13)))
不漂亮,但确实有效。
修改强>
参数化:
DELETE FROM tbl_1
WHERE (year = %minYear% AND (month > %minMonth% OR (month = %minMonth% AND day >= %minDay%)))
OR (year > %minYear% AND year < %maxYear%)
OR (year = %maxYear% AND (month < %maxMonth% OR (month = %maxMonth% AND day <= %maxDay%)))
答案 3 :(得分:0)
在where子句中将列转换为日期:
DELETE tbl_1
WHERE CONVERT(DATETIME, CONVERT(VARCHAR(4), year) + '-' + convert(VARCHAR(2), month) + '-' + CONVERT(VARCHAR(2), day)) BETWEEN '20091130' AND '20110513'
答案 4 :(得分:0)
最简单的方法是使用DATE_FORMAT。像这样:
...
WHERE DATE_FORMAT( CONCAT(year,"-",month,"-",day), '%Y-%m-%d' ) > "2009-11-30"
AND DATE_FORMAT( CONCAT(year,"-",month,"-",day), '%Y-%m-%d' ) < "2011-05-13"
希望这有帮助! : - )