Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


What will the max id be?


What will the max id be?

Author
Message
Lokesh Vij
Lokesh Vij
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: 1712 Visits: 1599
palotaiarpad (12/19/2012)
I'm also wrong, but i learned something. Could someone please explain, why is the identity resetted after a truncate? For me is a possible source of inconsitency.


TRUNCATE command apart from removing data from the table, resets the seed value of the identity column defined in the table.

Another command to re-seed identity is DBCC CHECKIDENT. It can be used something like below:
DBCC CHECKIDENT ('test_trun', RESEED, 0)



~ Lokesh Vij

Guidelines for quicker answers on T-SQL question
Guidelines for answers on Performance questions

Link to my Blog Post --> www.SQLPathy.com

Follow me @Twitter


Lokesh Vij
Lokesh Vij
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: 1712 Visits: 1599
palotaiarpad (12/19/2012)
For me is a possible source of inconsitency.


Not sure why you said this as "inconsistency"...it's just the property of TRUNCATE command!

~ Lokesh Vij

Guidelines for quicker answers on T-SQL question
Guidelines for answers on Performance questions

Link to my Blog Post --> www.SQLPathy.com

Follow me @Twitter


Stewart "Arturius" Campbell
Stewart "Arturius" Campbell
SSCertifiable
SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)SSCertifiable (6.3K reputation)

Group: General Forum Members
Points: 6251 Visits: 7188
Good back-to-basics question, Thanks

____________________________________________
Space, the final frontier? not any more...
All limits henceforth are self-imposed.
“libera tute vulgaris ex”
kapil_kk
kapil_kk
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: 2557 Visits: 2764
bcoz it is its behavior that every time we execute TRUNCATE command it will reset the identity value..

_______________________________________________________________
To get quick answer follow this link:
http://www.sqlservercentral.com/articles/Best+Practices/61537/
(Bob Brown)
(Bob Brown)
SSC Eights!
SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)SSC Eights! (849 reputation)

Group: General Forum Members
Points: 849 Visits: 1145
Thanks for a nice easy Wednesday question.
Hugo Kornelis
Hugo Kornelis
SSCrazy Eights
SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)SSCrazy Eights (8.7K reputation)

Group: General Forum Members
Points: 8728 Visits: 11716
palotaiarpad (12/19/2012)
Could someone please explain, why is the identity resetted after a truncate?

Because conceptually, TRUNCATE TABLE is closer to DROP / CREATE than to DELETE.


Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis
Dineshbabu
Dineshbabu
Ten Centuries
Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)

Group: General Forum Members
Points: 1096 Visits: 569
Easy one.. Remembering basics...

--
Dineshbabu
Desire to learn new things..
TomThomson
TomThomson
SSChampion
SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)

Group: General Forum Members
Points: 11302 Visits: 12084
SQL Kiwi (12/19/2012)
Another good one. 19% wrong right now Blink

Yes, a good one. And in the last 6 hours the wrong rate has grown from 19% to 27%, which seems rather high for such an easy question.

Tom

Sean of the Lynchmob
Sean of the Lynchmob
Old Hand
Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)Old Hand (396 reputation)

Group: General Forum Members
Points: 396 Visits: 510
palotaiarpad (12/19/2012)
why is the identity resetted after a truncate? For me is a possible source of inconsitency.


As Lokesh has already explained, resetting the identity seed is a characteristic of the 'truncate' command. If you want to retain the seed then you use 'delete' instead. So, there's no inconsistency, it is just a case of using the right command according to your needs.

At least you learnt something, so from that point of view it is a good question. ;-)
Dave62
Dave62
Hall of Fame
Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)

Group: General Forum Members
Points: 3099 Visits: 2734
palotaiarpad (12/19/2012)
I'm also wrong, but i learned something. Could someone please explain, why is the identity resetted after a truncate? For me is a possible source of inconsitency.


Hello, if resetting the identity is a possible source of inconsistency you may try using DELETE instead of TRUNCATE. DELETE will remove the data without resetting the identity.
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