在 SQL Server 中将日期转换为 varchar

Question

How do I convert a column which is date type to varchar ?

Sample data:

ENDDATE (DATE TYPE)
'1947-12-01 00-00-00' 

Requested results:

ENDDATE (VARCHAR)
    121947

Answer 1

If I understand the question correctly, you need the ENDDATE of value '1947-12-01 00-00-00' as 121947 . You can use the below query

SELECT RIGHT(MONTH(ENDDATE)*1010000+YEAR(ENDDATE),6)

Answer 2

If you are working with 2012 version or higher, you can use format. For earlier versions you can use convert with some string manipulations:

DECLARE @D as date = '1947-12-01'

SELECT  REPLACE(RIGHT(CONVERT(char(10), @d, 103), 7), '/', '') As charValue2008,
        FORMAT(@d, 'MMyyyy') as charValue2012

Results:

charValue2008   charValue2012
121947          121947

Please note that Format runs relativley slow, so if you have a lot of rows you might want to choose another way to do that.