在CSDN找到了相同的问题描述和解决方法:
问题:
我的表某个字段是Datetime型 以" YYYY-MM-DD 00:00:00" 存放
如
A 2009-01-22 21:22:22
B 2009-01-22 19:21:11
C 2009-01-22 23:10:22
现在用 select * from TABLE where date between '2009-1-22' And '2009-1-22' 想查日期为2009-1-22的记录 结果查不到
有什么办法吗
解决:
1: create table tb(id varchar(1),riqi datetime)
2: insert into tb values('A' , '2009-01-22 21:22:22')
3: insert into tb values('B' , '2009-01-22 19:21:11')
4: insert into tb values('C' , '2009-01-22 23:10:22')
5: go
6: --1
7: select * from tb where convert(varchar(10),riqi,120) = '2009-01-22'
8: /*
9: id riqi
10: ---- ------------------------------------------------------
11: A 2009-01-22 21:22:22.000
12: B 2009-01-22 19:21:11.000
13: C 2009-01-22 23:10:22.000
14:
15: (所影响的行数为 3 行)
16: */
17:
18: --2
19: select * from tb where riqi between '2009-01-22 00:00:00' and '2009-01-22 23:59:59'
20: /*
21: id riqi
22: ---- ------------------------------------------------------
23: A 2009-01-22 21:22:22.000
24: B 2009-01-22 19:21:11.000
25: C 2009-01-22 23:10:22.000
26:
27: (所影响的行数为 3 行)
28: */
29:
30: drop table tb
总结:
短日期类型默认Time为00:00:00,所以当使用between作限制条件时,就相当于between '2009-1-22 00:00:00' and '2009-1-22 00:00:00',因此就查不出数据。要想实现功能,那就使用连接字串的形式,在短日期后面把时间补全,那样就能实现功能了。
我的代码:
1: date1 between '" + dateTimePicker1.Value.ToShortDateString() + " 00:00:00' and '" + dateTimePicker2.Value.ToShortDateString() + " 23:59:59'