SQL Server: Transfer YYYYMMDD-HHMMSS to mm/dd/yyyy hh:mm:ss

Question

My SQL Server system is 2016.

As topic, I want to convert YYYYMMDD-HHMMSS to mm/dd/yyyy hh:mm:ss, and use dynamic SQL to fulfill this.

My da

Answer 1

Try it like this

DECLARE @tbl TABLE(ID NVARCHAR(100));
INSERT INTO @tbl VALUES
 ('20161119-075950')
,('20161117-110952')
,('20161118-153406');

--This is the actual select you need:

SELECT CAST(LEFT(ID,8) AS DATETIME) + STUFF(STUFF(RIGHT(ID,6),5,0,':'),3,0,':')
FROM @tbl

Your first part is strictly 8 chars long and implicitly casteable (unseperated datetime yyyymmdd). The time part is strictly 6 chars long. I use STUFF to insert the colons. This time can be added to a DATETIME. It will be - again implicitly - casted to DATETIME.

EDIT

To reach the given format you stated in the title just convert the first part first with code 101:

SELECT CONVERT(VARCHAR(10),CAST(LEFT(ID,8) AS DATETIME),101) + ' ' + STUFF(STUFF(RIGHT(ID,6),5,0,':'),3,0,':')
FROM @tbl