问题
How to convert yyyyMMddhh (2017092018) string to Date in SQL Server 2012?
Is it possible to do without using T-SQL to put the sentence into the INSERT clause?
INSERT INTO [dbo].[Table](SomeColumn)
VALUES (CONVERT(DATETIME, '2017092018', 'yyyyMMddhh'));
回答1:
Example
Declare @S varchar(50)='2017092018'
Select convert(datetime,left(@S,8)) + convert(datetime,right(@S,2)+':00')
Returns
2017-09-20 18:00:00.000
If 2012+, I would suggest try_convert() just in case you have some unexpected values.
回答2:
Here is yet another approach to this. It is similar to what John Cappelletti posted.
Declare @S varchar(50)='2017092018'
Select dateadd(hour, convert(int, right(@s, 2)), left(@s, 8))
回答3:
Alternate approach using STUFF:
DECLARE @val VARCHAR(25) = '2017092018';
SELECT CONVERT(DATETIME,STUFF(@val, 9, 0, ' ') + ':00')
This adds a space before the hour, then adds :00 for the minute value.
回答4:
You could use DATETIMEFROMPARTS:
DECLARE @d NVARCHAR(10)='2017092018';
SELECT DATETIMEFROMPARTS(LEFT(@d,4),SUBSTRING(@d,5,2),SUBSTRING(@d,7,2),RIGHT(@d,2),0,0,0 ) ;
Rextester Demo
EDIT:
Another option:
DECLARE @S varchar(10)='2017092018'
SELECT CAST(LEFT(@s, 8) AS DATETIME) + RIGHT(@s,2)/24.0;
Rextester Demo2
来源：https://stackoverflow.com/questions/46324500/how-to-convert-custom-string-to-date-in-sql-server