将 NVARCHAR(255) 转换为 DATE
我正在尝试使用 Excel 将一些旧的 SQL Server 数据传输到 SQL Server.Import/Export Data
应用程序似乎自动将大多数数据列设置为 NVARCHAR(255)
.我遇到的问题是,我的一列应该是 DATE
类型,但其中的所有数据看起来都像这样 18.08.2000 14:48:15
.
I'm trying to transfer some old SQL Server data using Excel into SQL Server. It seems that Import/Export Data
application automatically sets most data columns to NVARCHAR(255)
. Problem I have, is one of my columns is supposed to be a DATE
type, but all data in it looks like this 18.08.2000 14:48:15
.
因此,当我尝试使用此查询时:
So, when I try to use this query:
SELECT CONVERT(Date, DATE_TIME, 113)
FROM someTable
我收到此错误:
消息 9807,级别 16,状态 0,第 1 行
输入字符串不遵循样式113,要么改变输入字符串,要么使用不同的样式.
Msg 9807, Level 16, State 0, Line 1
The input character string does not follow style 113, either change the input character string or use a different style.
CAST 和CONVERT (Transact-SQL) 在我的情况下有效.
非常感谢任何建议或帮助.
Any advise or help is greatly appreciated.
已解决:
UPDATE myTable
SET columnName = CONVERT(NVARCHAR(255),CONVERT(SMALLDATETIME, columnName,105))
ALTER TABLE myTable
ALTER COLUMN columnName SMALLDATETIME
推荐答案
所以,如果它对任何人有用,这就是将数据类型 NVARCHAR 更改为 DATETIME 的确切代码:
So, if it will ever become useful to anyone, this is the exact code that changes datatype NVARCHAR to DATETIME:
UPDATE myTable
SET columnName = CONVERT(NVARCHAR(255),CONVERT(SMALLDATETIME, columnName,105))
ALTER TABLE myTable
ALTER COLUMN columnName SMALLDATETIME
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