assigning sequence numbers to records

hey all,
i have a table with about 1300 rows
the records are grouped by a type and i want to
assign each type a numbering sequence. what's the best way to do this?
For instance,
Rec1 Type1 Seq1
Rec2 Type1 Seq2
Rec3 Type2 Seq1
Rec4 Type2 Seq2
Rec5 Type2 Seq3
The seq columns is what i'm trying to incorporate.
thanks,
rodcharI assume from your post that the records are already sequenced globally...
Then you can do this for output only with a query
Select RecSeq, Type,
(Select Count(*) From TableName
Where Type = T.Type
And RecSeq <= T.RecSeq) TypeSeq
From TableName T
Or if you have another column in the table that you want to actually
populate with the value
Then
Update T Set TypeSeq =
(Select Count(*) From TableName
Where Type = T.Type
And RecSeq <= T.RecSeq)
From TableName T
"rodchar" wrote:

> hey all,
> i have a table with about 1300 rows
> the records are grouped by a type and i want to
> assign each type a numbering sequence. what's the best way to do this?
> For instance,
> Rec1 Type1 Seq1
> Rec2 Type1 Seq2
> Rec3 Type2 Seq1
> Rec4 Type2 Seq2
> Rec5 Type2 Seq3
> The seq columns is what i'm trying to incorporate.
> thanks,
> rodchar
>
>|||We need to know if there is another column we can using to uniquely identity
a row in a group.
How to dynamically number rows in a SELECT Statement
http://support.microsoft.com/defaul...kb;en-us;186133
AMB
"rodchar" wrote:

> hey all,
> i have a table with about 1300 rows
> the records are grouped by a type and i want to
> assign each type a numbering sequence. what's the best way to do this?
> For instance,
> Rec1 Type1 Seq1
> Rec2 Type1 Seq2
> Rec3 Type2 Seq1
> Rec4 Type2 Seq2
> Rec5 Type2 Seq3
> The seq columns is what i'm trying to incorporate.
> thanks,
> rodchar
>
>|||I don't think I'm doing something right here cause it's not working.
Please let me explain a different way to make sure:
Rec1 Type Seq#
-- -- --
1 A
3 B
2 A
4 A
5 B
After should look like the following:
Rec1 Type Seq#
-- -- --
1 A 1
2 A 2
4 A 3
3 B 1
5 B 2
The Seq# field is a new field that I need numbered sequentially by Types
So you're saying that the update statement in the above reply should do this
?
thanks,
rodchar
"CBretana" wrote:
> I assume from your post that the records are already sequenced globally...
> Then you can do this for output only with a query
> Select RecSeq, Type,
> (Select Count(*) From TableName
> Where Type = T.Type
> And RecSeq <= T.RecSeq) TypeSeq
> From TableName T
> Or if you have another column in the table that you want to actually
> populate with the value
> Then
> Update T Set TypeSeq =
> (Select Count(*) From TableName
> Where Type = T.Type
> And RecSeq <= T.RecSeq)
> From TableName T
>
> "rodchar" wrote:
>|||The "new" field that you want populated must already exist in the Table
first. Have you added it? If you have named it "SeqNo" then
Update T Set SeqNo=
(Select Count(*) From TableName
Where Type = T.Type
And Rec1 <= T.Rec1)
From TableName T
What error are you getting ?
"rodchar" wrote:
> I don't think I'm doing something right here cause it's not working.
> Please let me explain a different way to make sure:
> Rec1 Type Seq#
> -- -- --
> 1 A
> 3 B
> 2 A
> 4 A
> 5 B
> After should look like the following:
> Rec1 Type Seq#
> -- -- --
> 1 A 1
> 2 A 2
> 4 A 3
> 3 B 1
> 5 B 2
> The Seq# field is a new field that I need numbered sequentially by Types
> So you're saying that the update statement in the above reply should do th
is?
> thanks,
> rodchar
> "CBretana" wrote:
>|||I'm not getting an error message however the value for the new field contain
s
that maximum number (1372) for all the records:
Here's my actual statement:
UPDATE Records
SET SeqNo =
(SELECT COUNT(*)
FROM Records
WHERE Department = Records.Department AND
RecID <= Records.RecID)
FROM Records
So, here we have
RecID (like Rec1 is just an autonumber field)
Department is the type
"CBretana" wrote:
> The "new" field that you want populated must already exist in the Table
> first. Have you added it? If you have named it "SeqNo" then
> Update T Set SeqNo=
> (Select Count(*) From TableName
> Where Type = T.Type
> And Rec1 <= T.Rec1)
> From TableName T
>
> What error are you getting ?
>
> "rodchar" wrote:
>|||On Tue, 5 Apr 2005 11:55:03 -0700, rodchar wrote:

>I'm not getting an error message however the value for the new field contai
ns
>that maximum number (1372) for all the records:
>Here's my actual statement:
>UPDATE Records
>SET SeqNo =
> (SELECT COUNT(*)
> FROM Records
> WHERE Department = Records.Department AND
>RecID <= Records.RecID)
>FROM Records
(snip)
You omitted the table alias from CBretana's solution. Try this one
instead (not exactly the same as CBretana's suggestion - I changed it to
use ANSI-standard instead of proprietary Transact-SQL syntax):
UPDATE Records
SET SeqNo = (SELECT COUNT(*)
FROM Records AS R
WHERE R.Department = Records.Department
AND R.RecID <= Records.RecID)
(untested)
Best, Hugo
--
(Remove _NO_ and _SPAM_ to get my e-mail address)|||Because you're not using an alias for the tablename in the outer query... Th
e
way you wrote it,
UPDATE Records SET
SeqNo = (SELECT COUNT(*)
FROM Records
WHERE Department = Records.Department
AND RecID <= Records.RecID) -- THIS IS SAME AS X <=X
FROM Records
The token <Records> in the Last part of the subquery's where clause refers
to the Records table IN the subquery, so you're saying Where RecID in The
Subquery Record <= Same RecID in Sam eSubqueryRecord... This part need s to
ask
" Where RecID in SubQuery Record <= RecID in teh OUTER Query Record. That's
why you need to use Table ALias
UPDATE R SET
SeqNo = (SELECT COUNT(*)
FROM Records
WHERE Department = R.Department
AND RecID <= R.RecID)
FROM Records As R
"rodchar" wrote:
> I'm not getting an error message however the value for the new field conta
ins
> that maximum number (1372) for all the records:
> Here's my actual statement:
> UPDATE Records
> SET SeqNo =
> (SELECT COUNT(*)
> FROM Records
> WHERE Department = Records.Department AND
> RecID <= Records.RecID)
> FROM Records
> So, here we have
> RecID (like Rec1 is just an autonumber field)
> Department is the type
>
> "CBretana" wrote:
>|||thank you all, I give a try and let you know.
"CBretana" wrote:
> Because you're not using an alias for the tablename in the outer query...
The
> way you wrote it,
> UPDATE Records SET
> SeqNo = (SELECT COUNT(*)
> FROM Records
> WHERE Department = Records.Department
> AND RecID <= Records.RecID) -- THIS IS SAME AS X <=X
> FROM Records
> The token <Records> in the Last part of the subquery's where clause refer
s
> to the Records table IN the subquery, so you're saying Where RecID in The
> Subquery Record <= Same RecID in Sam eSubqueryRecord... This part need s t
o
> ask
> " Where RecID in SubQuery Record <= RecID in teh OUTER Query Record. That'
s
> why you need to use Table ALias
> UPDATE R SET
> SeqNo = (SELECT COUNT(*)
> FROM Records
> WHERE Department = R.Department
> AND RecID <= R.RecID)
> FROM Records As R
> "rodchar" wrote:
>|||That's awesome, hey any recommendations on a good book or how to get up to
speed in knowing how to write statements like these?
thanks so much for everyone's help here,
rodchar
"CBretana" wrote:
> Because you're not using an alias for the tablename in the outer query...
The
> way you wrote it,
> UPDATE Records SET
> SeqNo = (SELECT COUNT(*)
> FROM Records
> WHERE Department = Records.Department
> AND RecID <= Records.RecID) -- THIS IS SAME AS X <=X
> FROM Records
> The token <Records> in the Last part of the subquery's where clause refer
s
> to the Records table IN the subquery, so you're saying Where RecID in The
> Subquery Record <= Same RecID in Sam eSubqueryRecord... This part need s t
o
> ask
> " Where RecID in SubQuery Record <= RecID in teh OUTER Query Record. That'
s
> why you need to use Table ALias
> UPDATE R SET
> SeqNo = (SELECT COUNT(*)
> FROM Records
> WHERE Department = R.Department
> AND RecID <= R.RecID)
> FROM Records As R
> "rodchar" wrote:
>