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Trying to convert varchar to datetime


Trying to convert varchar to datetime

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savycara
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I am trying to convert 20114 which is stored as varchar to datetime but I am getting the following error

Syntax error during explicit conversion of VARCHAR value '20114' to a DATETIME field.
Can some one help me in solving this?
Erland Sommarskog
Erland Sommarskog
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And what date do you expect 20114 to convert to? And by which rule?

Erland Sommarskog, SQL Server MVP, www.sommarskog.se
savycara
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I need to convert it to 2011401 and need to use convert..Thank you
Luis Cazares
Luis Cazares
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2011401 does not have a common format for a date. Can you explain which is the year, month and day?


Luis C.
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savycara
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2011 is year
4 month
01 is day
Luis Cazares
Luis Cazares
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You could try something like this
 DECLARE @cDate varchar(5) = '20114'
SELECT DATEADD( MONTH, RIGHT(@cDate, 1) , CAST( LEFT(@cDate,4) + '0101' as DATE))




Luis C.
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savycara
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Thank you..and actually it is a column that stores data as varchar and data is like this


start date
------------
20114 ----2011 is year and 4 is month
20113
20112
20105
20106

I need to represent above data as (adding date 01 to all rows)

2011401-- year month and date
2011301
2011201
2010501
2010601
that is I need to add date and convert into DATETIME and 101 style
Erland Sommarskog
Erland Sommarskog
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DECLARE @d varchar(6) = '20114'
SELECT try_convert(date, substring(@d, 1, 4) +
CASE WHEN len(@d) = 5 THEN '0' ELSE '' END +
substring(@d, 5, 2) + '01')




I assume that 201110 would be 2011-10-01

I added try_convert, since most likely you have values in that column that are illegal.

Erland Sommarskog, SQL Server MVP, www.sommarskog.se
dwain.c
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Ignoring the try_convert (which is probably a good idea), I think this may be another way:


SELECT CONVERT(VARCHAR(10), CAST(STUFF('201311',5,0,'-0')+'-01' AS DATETIME), 101)
,CONVERT(VARCHAR(10), CAST(STUFF('20131',5,0,'-0')+'-01' AS DATETIME), 101);





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savycara
savycara
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DECLARE @d varchar(6) = '20114'
SELECT try_convert(date, substring(@d, 1, 4) +
CASE WHEN len(@d) = 5 THEN '0' ELSE '' END +
substring(@d, 5, 2) + '01')

This worked Thank you
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