SQL 如何将日期时间转换为 VarChar
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How to convert DateTime to VarChar
提问by Ali
I am working on a query in Sql Server 2005 where I need to convert a value in DateTimevariable into a varcharvariable in yyyy-mm-ddformat (without time part). How do I do that?
我正在 Sql Server 2005 中处理一个查询，我需要将DateTime变量中的值转换为格式中的varchar变量yyyy-mm-dd（没有时间部分）。我怎么做？
采纳答案by TonyOssa
With Microsoft Sql Server:
使用 Microsoft Sql Server：
--
-- Create test case
--
DECLARE @myDateTime DATETIME
SET @myDateTime = '2008-05-03'
--
-- Convert string
--
SELECT LEFT(CONVERT(VARCHAR, @myDateTime, 120), 10)
回答by Colin
Here's some test sql for all the styles.
这是所有样式的一些测试sql。
DECLARE @now datetime
SET @now = GETDATE()
select convert(nvarchar(MAX), @now, 0) as output, 0 as style
union select convert(nvarchar(MAX), @now, 1), 1
union select convert(nvarchar(MAX), @now, 2), 2
union select convert(nvarchar(MAX), @now, 3), 3
union select convert(nvarchar(MAX), @now, 4), 4
union select convert(nvarchar(MAX), @now, 5), 5
union select convert(nvarchar(MAX), @now, 6), 6
union select convert(nvarchar(MAX), @now, 7), 7
union select convert(nvarchar(MAX), @now, 8), 8
union select convert(nvarchar(MAX), @now, 9), 9
union select convert(nvarchar(MAX), @now, 10), 10
union select convert(nvarchar(MAX), @now, 11), 11
union select convert(nvarchar(MAX), @now, 12), 12
union select convert(nvarchar(MAX), @now, 13), 13
union select convert(nvarchar(MAX), @now, 14), 14
--15 to 19 not valid
union select convert(nvarchar(MAX), @now, 20), 20
union select convert(nvarchar(MAX), @now, 21), 21
union select convert(nvarchar(MAX), @now, 22), 22
union select convert(nvarchar(MAX), @now, 23), 23
union select convert(nvarchar(MAX), @now, 24), 24
union select convert(nvarchar(MAX), @now, 25), 25
--26 to 99 not valid
union select convert(nvarchar(MAX), @now, 100), 100
union select convert(nvarchar(MAX), @now, 101), 101
union select convert(nvarchar(MAX), @now, 102), 102
union select convert(nvarchar(MAX), @now, 103), 103
union select convert(nvarchar(MAX), @now, 104), 104
union select convert(nvarchar(MAX), @now, 105), 105
union select convert(nvarchar(MAX), @now, 106), 106
union select convert(nvarchar(MAX), @now, 107), 107
union select convert(nvarchar(MAX), @now, 108), 108
union select convert(nvarchar(MAX), @now, 109), 109
union select convert(nvarchar(MAX), @now, 110), 110
union select convert(nvarchar(MAX), @now, 111), 111
union select convert(nvarchar(MAX), @now, 112), 112
union select convert(nvarchar(MAX), @now, 113), 113
union select convert(nvarchar(MAX), @now, 114), 114
union select convert(nvarchar(MAX), @now, 120), 120
union select convert(nvarchar(MAX), @now, 121), 121
--122 to 125 not valid
union select convert(nvarchar(MAX), @now, 126), 126
union select convert(nvarchar(MAX), @now, 127), 127
--128, 129 not valid
union select convert(nvarchar(MAX), @now, 130), 130
union select convert(nvarchar(MAX), @now, 131), 131
--132 not valid
order BY style
Here's the result
这是结果
output style
Apr 28 2014 9:31AM 0
04/28/14 1
14.04.28 2
28/04/14 3
28.04.14 4
28-04-14 5
28 Apr 14 6
Apr 28, 14 7
09:31:28 8
Apr 28 2014 9:31:28:580AM 9
04-28-14 10
14/04/28 11
140428 12
28 Apr 2014 09:31:28:580 13
09:31:28:580 14
2014-04-28 09:31:28 20
2014-04-28 09:31:28.580 21
04/28/14 9:31:28 AM 22
2014-04-28 23
09:31:28 24
2014-04-28 09:31:28.580 25
Apr 28 2014 9:31AM 100
04/28/2014 101
2014.04.28 102
28/04/2014 103
28.04.2014 104
28-04-2014 105
28 Apr 2014 106
Apr 28, 2014 107
09:31:28 108
Apr 28 2014 9:31:28:580AM 109
04-28-2014 110
2014/04/28 111
20140428 112
28 Apr 2014 09:31:28:580 113
09:31:28:580 114
2014-04-28 09:31:28 120
2014-04-28 09:31:28.580 121
2014-04-28T09:31:28.580 126
2014-04-28T09:31:28.580 127
28 ????? ??????? 1435 9:31:28:580AM 130
28/06/1435 9:31:28:580AM 131
Make nvarchar(max)shorter to trim the time. For example:
做nvarchar(max)短修剪的时间。例如：
select convert(nvarchar(11), GETDATE(), 0)
union select convert(nvarchar(max), GETDATE(), 0)
outputs:
输出：
May 18 2018
May 18 2018 9:57AM
回答by Joel Coehoorn
Try the following:
请尝试以下操作：
CONVERT(varchar(10), [MyDateTimecolumn], 20)
For a full date time and not just date do:
对于完整的日期时间而不仅仅是日期，请执行以下操作：
CONVERT(varchar(23), [MyDateTimecolumn], 121)
See this page for convert styles:
请参阅此页面以了解转换样式：
http://msdn.microsoft.com/en-us/library/ms187928.aspx
OR
SQL Server CONVERT() Function
http://msdn.microsoft.com/en-us/library/ms187928.aspx
或
SQL Server CONVERT() 函数
回答by Zar Shardan
SQL Server 2012 has a new function , FORMAT: http://msdn.microsoft.com/en-us/library/ee634924.aspx
SQL Server 2012 有一个新功能，格式：http: //msdn.microsoft.com/en-us/library/ee634924.aspx
and you can use custom date time format strings: http://msdn.microsoft.com/en-us/library/ee634398.aspx
您可以使用自定义日期时间格式字符串：http: //msdn.microsoft.com/en-us/library/ee634398.aspx
These pages imply it is also available on SQL2008R2, but I don't have one handy to test if that's the case.
这些页面暗示它也可以在 SQL2008R2 上使用，但我没有手头可以测试是否是这种情况。
Example usage (Australian datetime):
用法示例（澳大利亚日期时间）：
FORMAT(VALUE,'dd/MM/yyyy h:mm:ss tt')
回答by FCKOE
You can use DATEPART(DATEPART, VARIABLE). For example:
您可以使用DATEPART(DATEPART, VARIABLE). 例如：
DECLARE @DAY INT
DECLARE @MONTH INT
DECLARE @YEAR INT
DECLARE @DATE DATETIME
@DATE = GETDATE()
SELECT @DAY = DATEPART(DAY,@DATE)
SELECT @MONTH = DATEPART(MONTH,@DATE)
SELECT @YEAR = DATEPART(YEAR,@DATE)
回答by Per Hornsh?j-Schierbeck
Either Castor Convert:
无论是Cast或Convert：
Syntax for CAST:
语法CAST：
CAST ( expression AS data_type [ (length ) ])
Syntax for CONVERT:
语法CONVERT：
CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
http://msdn.microsoft.com/en-us/library/ms187928.aspx
http://msdn.microsoft.com/en-us/library/ms187928.aspx
Actually since you asked for a specific format:
实际上，因为您要求特定格式：
REPLACE(CONVERT(varchar(10), Date, 102), '.', '-')
回答by P's-SQL
-- This gives you the time as 0 in format 'yyyy-mm-dd 00:00:00.000'
-- 这给你时间为 0 格式 'yyyy-mm-dd 00:00:00.000'
SELECT CAST( CONVERT(VARCHAR, GETDATE(), 101) AS DATETIME) ;
回答by dmunozpa
With Microsoft SQL Server:
使用 Microsoft SQL Server：
Use Syntax for CONVERT:
使用 CONVERT 的语法：
CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
Example:
例子：
SELECT CONVERT(varchar,d.dateValue,1-9)
For the style you can find more info here: MSDN - Cast and Convert (Transact-SQL).
对于样式，您可以在此处找到更多信息：MSDN - Cast and Convert (Transact-SQL)。
回答by Amy Patterson
Try the following:
请尝试以下操作：
CONVERT(VARCHAR(10),GetDate(),102)
Then you would need to replace the "." with "-".
然后你需要替换“。” 和 ”-”。
Here is a site that helps http://www.mssqltips.com/tip.asp?tip=1145
回答by Andy Jones
declare @dt datetime
set @dt = getdate()
select convert(char(10),@dt,120)
I have fixed data length of char(10)as you want a specific string format.
我有固定的数据长度，char(10)因为你想要一个特定的字符串格式。
