[英]How to convert to date in SQL Server
How can I convert single date values to date? 如何将单个日期值转换为日期? For example in C# it is possible with the following;
例如在C#中,可以使用以下内容;
int year = 2019;
int day = 1;
int month = 12;
DateTime newDate = new DateTime(year, month, day);
How is it possible in SQL Server? 如何在SQL Server中实现?
I'm not asking static string value conversion such as; 我不是要求静态字符串值转换,如;
Convert(date, '2019-12-01')
because every element (year, month, day) in date must be parameter. Convert(date, '2019-12-01')
因为Convert(date, '2019-12-01')
每个元素(年,月,日)必须是参数。
For 2012 version or later you can use DateFromParts : 对于2012版或更高版本,您可以使用DateFromParts :
DECLARE @year VARCHAR(4) = 2019;
DECLARE @day VARCHAR(2) = 1;
DECLARE @month VARCHAR(2) = 12;
SELECT DATEFROMPARTS ( @year, @month, @day )
for 2008 version or higher you can use: 对于2008版或更高版本,您可以使用:
SELECT CAST(CAST(@year AS varchar) + '-' + CAST(@month AS varchar) + '-' + CAST(@day AS varchar) AS DATE)
You may try this: 你可以试试这个:
declare year varchar(5) = 2019;
declare day varchar(2) = 1;
declare month varchar(2) = 12;
declare newDate DateTime = (select Convert(date, year + '-' + month + '-' + date));
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.