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


String comparison


String comparison

Author
Message
sestell1
sestell1
SSCrazy
SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)SSCrazy (2.8K reputation)

Group: General Forum Members
Points: 2768 Visits: 3469
Comments posted to this topic are about the item String comparison
bitbucket-25253
bitbucket-25253
SSCrazy Eights
SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)SSCrazy Eights (9.4K reputation)

Group: General Forum Members
Points: 9427 Visits: 25280
Nice question ..... and it teaches something additional ... it teaches one to read definitions as well as the T-SQL very, very closely

If everything seems to be going well, you have obviously overlooked something.

Ron

Please help us, help you -before posting a question please read

Before posting a performance problem please read
Koen Verbeeck
Koen Verbeeck
SSC-Dedicated
SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)SSC-Dedicated (34K reputation)

Group: General Forum Members
Points: 34211 Visits: 13270
Great question.
Although, the first X returned is not just X but X with 19 spaces. SSMS doesn't really show it that well, but if you copy paste the value you'll see the spaces.


How to post forum questions.
Need an answer? No, you need a question.
What’s the deal with Excel & SSIS?
My blog at SQLKover.

MCSE Business Intelligence - Microsoft Data Platform MVP
Nakul Vachhrajani
Nakul Vachhrajani
SSCrazy
SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)SSCrazy (2.6K reputation)

Group: General Forum Members
Points: 2563 Visits: 2147
Very good question! The question proves that the devil is in the details! The question teaches everyone a lot of things.

Thank-you!

Thanks & Regards,
Nakul Vachhrajani.
http://nakulvachhrajani.com
Be courteous. Drive responsibly.

Follow me on
Twitter: @sqltwins
Google Plus: +Nakul
palotaiarpad
palotaiarpad
SSCrazy
SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)

Group: General Forum Members
Points: 2213 Visits: 783
A very good question, even if i missed it. :-P
I thought, if the LEN delivers 1, then the LIKE makes the same. For me a bit inconsistent, but good to know how stuff works.
Iulian -207023
Iulian -207023
SSCommitted
SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)

Group: General Forum Members
Points: 1737 Visits: 1248
Nice question, thank you

Iulian
David McKinney
David McKinney
SSCommitted
SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)

Group: General Forum Members
Points: 1663 Visits: 2090
Excellent question. I often come across code such as

IF col1 like col2 (without any wildcards)

and I've often wondered why they didn't just put IF col1=col2. Til today I assumed they were equivalent. (I wonder if those that wrote this code appreciate the nuance.)

Thanks for expanding my knowledge.
Hugo Kornelis
Hugo Kornelis
SSChampion
SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)SSChampion (13K reputation)

Group: General Forum Members
Points: 13122 Visits: 12158
Nice question!

However, the explanation and reference are slightly incomplete, as they don't explain the behaviour of @A LIKE @B versus @ LIKE @A.
The explanation for that can simply be found in the Books Online article on LIKE, in the "Remarks" section. Link: http://msdn.microsoft.com/en-us/library/ms179859.aspx


Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis
rals
rals
SSCrazy
SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)

Group: General Forum Members
Points: 2191 Visits: 843
Nice question.

When we print the variables we can see the padded space in @A.

PRINT @A
PRINT @B
PRINT 'A:'+@A + 'B:'+ @B+':'

Regards,
Rals
.

Gobikannan
Gobikannan
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: 2254 Visits: 614
Nice question.

-----------------
Gobikannan
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