SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


SQL LEN Function


SQL LEN Function

Author
Message
Site Owners
Site Owners
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: Administrators
Points: 18667 Visits: 225
Comments posted to this topic are about the item SQL LEN Function
kramaswamy
kramaswamy
SSChampion
SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)SSChampion (10K reputation)

Group: General Forum Members
Points: 10296 Visits: 1908
ouch. didn't know about the trailing space removal before length calculation. nice question!
Doron Hadar
Doron Hadar
Mr or Mrs. 500
Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)Mr or Mrs. 500 (530 reputation)

Group: General Forum Members
Points: 530 Visits: 686
ouch indeed...
Good one.
Rick Romack
Rick Romack
Ten Centuries
Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)

Group: General Forum Members
Points: 1156 Visits: 297
I do disagree with this answer,
If I run
DECLARE @str NVARCHAR(10)
SET @str = '1, 2, 3, '
SET @str = LEFT(@str, LEN(@str)- 2)
select len(@str)
SELECT @str
The return for len(@str) returns 5 that would be '1, 2,' with no space after the comma.

If I copy the result of the SELECT @str to word and have it show all characters there is no space after the comma.
david.wright-948385
david.wright-948385
SSCrazy
SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)

Group: General Forum Members
Points: 2338 Visits: 995
try SELECT '''' + @str + '''' Smile
Gatekeeper
Gatekeeper
SSC Eights!
SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)SSC Eights! (923 reputation)

Group: General Forum Members
Points: 923 Visits: 889
Rick, it does return the space at the end:

DECLARE @str NVARCHAR(10)
SET @str = '1, 2, 3, '
SET @str = LEFT(@str, LEN(@str)- 2)
select len(@str)
SELECT @str
SELECT RIGHT(@str,1) -- returns space, not a comma

BTW, I got it wrong too.

/* Anything is possible but is it worth it? */
Michael Poppers
Michael Poppers
UDP Broadcaster
UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)

Group: General Forum Members
Points: 1489 Visits: 416
kramaswamy (9/10/2009)
ouch. didn't know about the trailing space removal before length calculation. nice question!

Ditto :-).
webrunner
webrunner
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16935 Visits: 4144
Michael Poppers (9/10/2009)
kramaswamy (9/10/2009)
ouch. didn't know about the trailing space removal before length calculation. nice question!

Ditto :-).


Ouch is right. :-) I got the fact that the LEN ignores the last space, but mistakenly thought that it trims the resulting string. But now I see that it doesn't. It returns the exact remaining string, even if the last character in the trimmed string is itself a space.

Nice question. Tricky in a way but not simply "gotcha" trivia. It's the kind of trickiness one needs to know when dealing with strings that have spaces.

- webrunner

-------------------
A SQL query walks into a bar and sees two tables. He walks up to them and says Can I join you?
Ref.: http://tkyte.blogspot.com/2009/02/sql-joke.html
SanjayAttray
SanjayAttray
SSCrazy Eights
SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)SSCrazy Eights (8.5K reputation)

Group: General Forum Members
Points: 8459 Visits: 1619
If executed with result in text then you see space after , . But, if result set in grid it does not show space with copy and paste result set in notepad.

SQL DBA.
Cliff Jones
Cliff Jones
SSCertifiable
SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)SSCertifiable (6.8K reputation)

Group: General Forum Members
Points: 6823 Visits: 3648
Yes, interesting question. Can be fooled by the fact that ...

SELECT len (@str),@str

Returns:
----------- ----------
5 1, 2,

...with a space after the last comma.
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum








































































































































































SQLServerCentral


Search