T-SQL中的DateTime转换错误

时间:2011-04-04 18:27:04

标签: sql sql-server-2005 tsql sql-server-2008 datetime

我在名为TimeZone的表中有两列Arrive_Date和Interval。我正在尝试添加这两列以获得第三列,其中包含Date和Interval。

我的表格有这样的数据:

Interval        Arrive_Date
830             2010-11-01 00:00:00.000
1100            2010-11-01 00:00:00.000
1230            2010-11-02 00:00:00.000
0               2011-01-04 00:00:00.000
30              2011-03-17 00:00:00.000

我希望第三列为

Interval        Arrive_Date                           Arrive_DateTime
830             2010-11-01 00:00:00.000               2010-11-01 08:30:00.000
1100            2010-11-01 00:00:00.000               2010-11-01 11:00:00.000
1230            2010-11-02 00:00:00.000               2010-11-02 12:30:00.000
0               2011-01-04 00:00:00.000               2011-01-04 00:00:00.000
30              2011-03-17 00:00:00.000               2011-03-17 00:30:00.000

我正在使用此查询:

SELECT CAST(LEFT(CONVERT(VARCHAR,Arrive_DATE,101),10) + ' ' + LEFT(Interval,2) + ':' + RIGHT(Interval,2) + ':00'  AS DATETIME)
from TimeZone

但我收到此错误:

Msg 242, Level 16, State 3, Line 1
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value.

任何人都可以帮我吗?

4 个答案:

答案 0 :(得分:2)

好吧,我不是在带有数据库引擎的计算机上,所以我无法测试它(我同意它们是丑陋的字符串操作),但这是一种方法:

SELECT  Interval, Arrive_Date,
        CAST(CONVERT(VARCHAR(8),Arrive_Date,112) + ' ' + LEFT(RIGHT('0000'+CAST(Interval AS VARCHAR(4)),4),2)+':'+RIGHT('00'+CAST(Interval AS VARCHAR(4)),2)+':00' AS DATETIME) AS Arrive_Datetime
FROM TimeZone

答案 1 :(得分:1)

我会使用dateadd()和数学操作数来完成工作。它应该更快。

select dateadd(minute, 
               Interval%100, 
               dateadd(hour, 
                       CAST(Interval/100 as int), 
                       Arrive_Date)
              )
from TimeZone

答案 2 :(得分:0)

使用DATEADD()代替这些丑陋的字符串操作怎么样?

尝试类似:

SELECT
    Interval % 100 AS [Minutes],
    CONVERT(INT, Interval / 100) AS [Hours],
    DATEADD(HOUR, CONVERT(INT, Interval / 100), DATEADD(MINUTE, Interval % 100, Arrive_Date)) AS [AllTogether]
FROM TimeZone

答案 3 :(得分:0)

我会使用一个计算列(并且我将“间隔”存储为从一天开始以秒为单位的所需偏移量(但这只是我):

drop table #TimeZone
go
create table #TimeZone
(
  id            int      not null identity(1,1) primary key ,
  interval_hhmm int      not null ,
  Arrive_Date   datetime not null ,
  Arrive_DateTime as dateadd(   mm , interval_hhmm % 100 , -- add the minutes
                       dateadd( hh , interval_hhmm / 100 , -- add the hours
                         convert(datetime,convert(varchar,Arrive_Date,112),112) -- make sure the base date/time value doesn't have a time component
                       )
                     ) ,
)
go

insert #TimeZone ( interval_hhmm , Arrive_Date ) values(830  , '2010-11-01 23:59:59.000')
insert #TimeZone ( interval_hhmm , Arrive_Date ) values(1100 , '2010-11-01 00:00:00.000')
insert #TimeZone ( interval_hhmm , Arrive_Date ) values(1230 , '2010-11-02 00:00:00.000')
insert #TimeZone ( interval_hhmm , Arrive_Date ) values(0    , '2011-01-04 00:00:00.000')
insert #TimeZone ( interval_hhmm , Arrive_Date ) values(30   , '2011-03-17 00:00:00.000')

select * from #timezone