SQL SERVER 2000 中的 Into Date
问题描述：
如何将 int 列，出生日期(样本值 20090301)转换为格式(01/03/2009)的日期列SQL Server 2000
How to convert an int column ,Birthdate( sample value 20090301) to a date column in the format(01/03/2009) Sql Server 2000
我试图转换如下内容
select * from tabl
where
cast(dob as datetime)>='01/03/2009'
which gives an error
Msg 8115, Level 16, State 2, Line 1
Arithmetic overflow error converting expression to data type datetime.
答
SQL Server 不允许直接转换 int -> datetime，但是如果您确定可以先转换为 nvarchar，然后再转换为日期.对于你的问题，这里有一个例子
SQL Server doesn't allow you to cast int -> datetime directly, but if you're sure you can cast it to nvarchar first and then cast it to date. For your question here's an example
declare @test int = 20090301
select CONVERT(datetime, CAST(@test as nvarchar), 112)
112 是您提到的格式，这里是 Convert 的所有可能格式的列表功能.
112 is the format you mentioned, here's the list of all possible formats for Convert function.