Sequences I

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Sequences I

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SQLDCH SSChampion Points: 11634 More actions · Answer 1

Thanks, learned something new.

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Cliff Jones SSChampion Points: 10547 More actions · Answer 2

jfogel (4/17/2012)
Got it right. It is nice to see the sequence feature is now in SQL Server. Mainly because developers had to use a sequence for Oracle and an identity column for SQL Server. At least now the code can move closer to being the same. Note I wrote closer.

Yes, I agree. After all these years it is good to see it being implemented in SQL Server.

OzYbOi d(-_-)b SSCarpal Tunnel Points: 4054 More actions · Answer 3

tks for the questions - +1 for learned something new today. cheers

EL Jerry SSCertifiable Points: 7063 More actions · Answer 4

Good one. Good to know since I still don't have access to SQL Server 2012, but eventually will.

"El" Jerry.

"A watt of Ottawa" - Gerardo Galvan

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Ken SSCoach Points: 17191 More actions · Answer 5

Thanks for the 2012 question. Keep 'em coming.

Schadenfreude-Mei SSChampion Points: 14083 More actions · Answer 6

deleted due to embarrisment.

Adam Zacks-------------------------------------------Be Nice, Or Leave

Cliff Jones SSChampion Points: 10547 More actions · Answer 7

Schadenfreude-Mei (4/17/2012)
Sorry guys but I took a guess, got it wrong so ran it through my local 2k8r2 and get the below:
Msg 343, Level 15, State 1, Line 1
Unknown object type 'SEQUENCE' used in a CREATE, DROP, or ALTER statement.
Msg 102, Level 15, State 1, Line 3
Incorrect syntax near ';'.
Msg 343, Level 15, State 1, Line 5
Unknown object type 'SEQUENCE' used in CREATE, DROP, or ALTER statement.
SO what gives?

This feature requires SQL 2012.

jfogel-1131029 SSC Veteran Points: 235 More actions · Answer 8

jfogel-1131029

SSC Veteran

Points: 235

April 17, 2012 at 10:30 am

#1474875

Yes, note the wording of the question.

sknox SSChampion Points: 12388 More actions · Answer 9

Schadenfreude-Mei (4/17/2012)
Sorry guys but I took a guess, got it wrong so ran it through my local 2k8r2 and get the below:
Msg 343, Level 15, State 1, Line 1
Unknown object type 'SEQUENCE' used in a CREATE, DROP, or ALTER statement.
Msg 102, Level 15, State 1, Line 3
Incorrect syntax near ';'.
Msg 343, Level 15, State 1, Line 5
Unknown object type 'SEQUENCE' used in CREATE, DROP, or ALTER statement.
SO what gives?

From the question:

In a default installation of SQL Server 2012...

From the answer:

Sequences, a new feature in SQL Server 2012,...

Cliff Jones SSChampion Points: 10547 More actions · Answer 10

Schadenfreude-Mei (4/17/2012)
deleted due to embarrisment.

Thanks, made me laugh. 🙂

sknox SSChampion Points: 12388 More actions · Answer 11

Schadenfreude-Mei (4/17/2012)
deleted due to embarrisment.

We did kind of jump on you, didn't we? Rest assured it wasn't intended (I know when I wrote my post, the other two weren't there). We've all misread questions from time to time, and every once in a while, there actually is a poorly written question.

😉

SQLRNNR SSC Guru Points: 281334 More actions · Answer 12

Nice question

Thanks

Jason...AKA CirqueDeSQLeil
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SQL RNNR
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dick.baker Mr or Mrs. 500 Points: 504 More actions · Answer 13

for more info ..

-- #1 long numbers (Carlo doesn't like for Excel)

CREATE SEQUENCE SSC_ROCKS;

SELECT N0 = (NEXT VALUE FOR SSC_ROCKS); -- -9223372036854775808

SELECT N1 = (NEXT VALUE FOR SSC_ROCKS); -- -9223372036854775807

DROP SEQUENCE SSC_ROCKS;

GO

-- #2 try hex string instead

CREATE SEQUENCE SSC_ROCKX;

SELECT N0 = [sys].[fn_varbintohexstr](NEXT VALUE FOR SSC_ROCKX); -- 0x8000000000000000

SELECT N1 = [sys].[fn_varbintohexstr](NEXT VALUE FOR SSC_ROCKX); -- 0x8000000000000001

DROP SEQUENCE SSC_ROCKX;

GO

-- #3 show that ROLLBACK doesn't erase/reset sequence, ie behaves like IDENTITY()

CREATE SEQUENCE SSC_ROCKT;

begin tran

SELECT N0 = [sys].[fn_varbintohexstr](NEXT VALUE FOR SSC_ROCKT); -- 0x8000000000000000

SELECT N1 = [sys].[fn_varbintohexstr](NEXT VALUE FOR SSC_ROCKT); -- 0x8000000000000001

rollback

SELECT N2 = [sys].[fn_varbintohexstr](NEXT VALUE FOR SSC_ROCKT); -- 0x8000000000000002

DROP SEQUENCE SSC_ROCKT;

GO

TomThomson SSC Guru Points: 104773 More actions · Answer 14

Koen Verbeeck (4/17/2012)
Carlo Romagnano (4/17/2012)
I am curious to know how many developpers will use default value for "START WITH". In most cases will be a negative number.
They will all be negative, except for tinyint.

Only if they don't specify a negative increment (if they do, they will be positive).

Tom

TomThomson SSC Guru Points: 104773 More actions · Answer 15

Henrico Bekker (4/16/2012)
got it wrong, as the correct answer wasn't listed.
your syntax is wrong in, sequence wouldn't be created to start of with...no increment value, no 'AS'..etc.

The CREATE SEQUENCE page in Bol gives an example in which the sequence is created by

CREATE SEQUENCE Test.TestSequence ;

so clearly MS thinks that not specifying any of those things works.

Tom