Nested Set Model
Jan 30, 2006
hi guys,
i have the following category table...
CREATE TABLE [dbo].[categories] (
[cat_id] [int] IDENTITY (1, 1) NOT NULL ,
[dModified] [datetime] NULL ,
[dCreated] [datetime] NULL ,
[cat_parent_id] [int] NULL ,
[cat_lft] [int] NULL ,
[cat_rgt] [int] NULL ,
[cat_image] [varchar] (255) COLLATE Latin1_General_CI_AS NULL ,
[cat_sort_order] [int] NULL
) ON [PRIMARY]
GO
i now wish to add a levels column which indicates (funnily enough :)) which level each record is on starting from 1.
is there a query i can use which will output for me the levels based on the child/parent relationship?
regards
mike
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Sep 14, 2006
We have a nested set L and R design in our database.
The design allows multiple instances of nodes in the hierarchy. Each node has a combination of node name and its instance id as the primary key. We also maintain a unique_qty column that has the unique number of nodes below a particular node. This unique qty basically ignores the multiple instances of nodes below it and counts only the distinct node names(ignoring their instance ids).
the problem that im facing is...how do i update the unique_qty when i perform any move in the tree.
UPDATE Hierarchy
SET unique_qty = ( SELECT COUNT(DISTINCT node_name) FROM Hierarchy AS H2 WHERE H2.L > Hierarchy.L AND H2.R < Hierarchy.R )
I am using the above query to find out the unique_qty when i initially populate the table.
My question is.. when i make a move of a subtree within the hierarchy, then i need to update this unique_qty for the source parents and the destination parents of the subtree( and the unique_qty for eah node in the subtree being moved remains the same ).
I had two ideas on how to update the parent nodes of the subtree:
1) for each node in the path to the root in the hierarchy, from the parent nodes( both source side and destination side) recalculate the unique_qty
2) for each node in the subtree find out until what level in the path to the root, we need to update the unique_qty, and then update only those unique_qtys
any suggestions on my methods? which one is better? any more ideas on how to do this??
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Sep 14, 2006
We have a nested set design in our database.
The
design allows multiple instances of nodes in the hierarchy. Each node
has a combination of node name and its instance id as the primary key.
We also maintain a unique_qty column that has the unique number of
nodes below a particular node. This unique qty basically ignores the
multiple instances of nodes below it and counts only the distinct node
names(ignoring their instance ids).
the problem that im facing is...how do i update the unique_qty when i perform any move in the tree.
Thanks in advance
satya phani
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Jul 3, 2006
Hi,
With reference to http://www.intelligententerprise.com/001020/celko.jhtml?_requestid=235427
I want the "sql stmt" which wud give the lft and rgt col values..
i am reading his book but cant understand :eek: where he explains
wat lft and rgt cols are..
"The root is always (lft,rgt) (1, 2*(Select count(*)from table) and leaft nodes are (lft+1=rgt)" :S
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Oct 26, 2006
I can't figure out how to put nested tables into the Data Mining Model Training Transform (SSIS). I can do a simple case table, but how do you get those nested tables with DM Training Transformation? Any ideas? Samples?
Thanks in advance,
-Young K
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Dec 1, 2006
Hi, all here,
Thank you very much for your kind attention.
I dont think we should sample any nested tables for data mining model training? Since I think any nested tables are bound to the case table. Therefore whenever we sample the case table, the nested tables are like any other input attributes within the case table to be rectrieved as inputs accordingly?
Thank you very much for any guidance to clear my confusion.
With best regards,
Yours sincerely,
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Dec 5, 2005
Running 2005 Beta 3 Refresh. When I first deploy, it works fine. Subsequent deployments yield the following error:
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Oct 19, 2015
I need to develop a language specific dwh, meaning that descriptions of products are available from a SAP system in multiple languages. English is the most important language and that is the standard. But, there are also requirements of countries that wants productdescriptions in their language.
Productnr Productdesc Language
1 product EN
1 produkt DE
One option is to column the descriptions, but that is not very elegantly. I was thinking of using bridge tables to model this but you have to always select a language in a filter (I think)..
I'm thinking of a technical solution, such that when a user logs on, the language is determined and a view determines whether to pick a certain product table specific for a certain language. But then I don't have the opportunity to interchange the different language specific fields in a report (or in my case PowerPivot).
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Apr 25, 2008
We have the following scenario,
We have our Production server having database on which Few DTS packages execute every night. Most of them have Bulk Insert stored procedures running.
SO we have to set Recovery Model of the database to simple for that period of time, otherwise it will blow up our logs.
Is there any way we can set up log shipping between our production and standby server, but pause it for some time, set recovery model of primary db to simple, execute DTS Bulk Insert Jobs, Bring it Back to Full recovery Model AND finally bring back Log SHipping.
It it possible, if yes how can we achieve this.
If not what could be another DR solution in this scenario.
Thanks Much
Tejinder
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Oct 27, 2007
Hi all,
I have MS Time Seeries model using a database of over a thousand products each of which has hundreds of cases. It amazingly takes only a few minutes to finish processing the model, but when I click Mining Model Viewer to view the models, it takes many hours to show up. Once the window is open, I can choose model for different products almost instantly. Is this normal?
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Aug 10, 2005
hi !!i have a question about the connected and disconnected model to access the Sql server DB.......i know that there is better to choose one rather than the other in some situantions and there is no better model in all cases...... os i hope you can help me to decide what shall i choose...i will use the DB to connect to Web services and read data from the DB and wrtie some data back.......i do not know that to use ..... i hope you advise me and tell me about the rules that will allow me to choose what model to choose .... i appreciate your help!!Thanks !!!
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Nov 15, 2006
I get the following error when I try to load the mining model in the mining model viewer
Query (1, 6) The '[System].[Microsoft].[AnalysisServices].[System].[DataMining].[NeuralNet].[GetAttributeValues]' function does not exist.
I get a similar error when I try to load the Load Mining Accuracy Chart
Failed to execute the query due to the following error:
Query (1, 6) The '[System].[Microsoft].[AnalysisServices].[System].[DataMining].[AllOther].[GenerateLiftTableUsingDatasource]' function does not exist.
I have OWC 11 installed. What am I missing here?
Thanks
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Jan 3, 2007
Can you give a whole SQL statement an alias so you can use it later?
Eg.
SELECT * FROM Employees WHERE age < 19
-- Could I call the above statement something like 'statement1' to use below as shown
SELECT * FROM Employees WHERE age < 25 AND NOT IN (statement1)
Soin effect I get a nested statement.
The reason I am asking about aliases is because this would need to be repeated for, E.g. age < 30 Then age < 35 and so on and so forth.
So basically, I just want to alias a qhole SQL statement
Any help would be greatly appreciated - George
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Jul 20, 2005
Hi all,I have a query that looks like so:SELECT GLDCT AS [Doc Type], GLDOC AS DocNumber, GLALID ASPerson_NameFROM F0911WHERE (GLAID = '00181913')However by stipulating that GLAID = GLAID I cannot get the person_nameas not all the GLALID fields are filled in. from my reading of thehelpdesk I have a felling that a nested query might be the way to goor a self-join but beyond this I am lost!?Many thanks for any pointers in advance.Sam
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Oct 15, 2007
I am trying to do some nested IF ELSE conditions. I get an error saying 'Error near work Begin'. Below is teh query and the variables comes in thru cursor.
Can somebody advise me on this and also let me know the best practices and alternative to this if any.
IF (@CCTable = 'Claiminassoc')
BEGIN
IF ( @ClaimCenterField = 'ClaimID' AND @VALUE ='Claim')
BEGIN
UPDATE dbo.Table SET ColName = 'Y'
WHERE ID = @ID AND CCTable = 'Claiminassoc' AND CCField = 'ClaimID'
AND DWField = 'CatastropheDesignationFlag'
END
END
ELSE IF (@CCTable = 'EmploymentData')
BEGIN
IF (@VALUE ='TRUE')
BEGIN
UPDATE dbo.Table SET ColName = 'Y'
WHERE ID = @ID AND CCTable = 'Claim' AND CCField = 'WagePaymentCont'
END
ELSE IF (@VALUE ='FALSE')
BEGIN
UPDATE dbo.Table SET ColName = 'N'
WHERE ID = @ID AND CCTable = 'Claim' AND CCField = 'WagePaymentCont'
END
END
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Apr 2, 2008
Hi gang,
I have a challenge, which seems like it is probably trivial, but SQL chops are not up to the task, and I am hoping one of you hot-shot DBAs can throw me a bone!
I have a query that populates an OLAP Time dimension table (basically one row per day of the year over several years). What I want to do is expand that table to include each hour of each day over the time span.
The CTE I am using for the day population is:
Code Snippet
WITH dates(date)
-- A recursive CTE that produce all dates between 2006 and 2057-12-31
AS
(
SELECT cast('2006' AS dateTime) date -- SQL Server supports the ISO 8601 format so this is an unambigious shortcut for 1999-01-01
UNION ALL -- http://msdn2.microsoft.com/en-us/library/ms190977.aspx
SELECT (date + 1) AS date
FROM dates
WHERE
date < cast('2058' AS dateTime) -1
)
What I wanted to do was something like:
Code Snippet
WITH hours(hr)
AS
(
SELECT (DATEPART(hh,date) hr
UNION ALL
SELECT (hr + 1) AS hr
FROM hours
WHERE hr < 24
)
inserted just after
Code Snippet
FROM dates
in the initial CTE. But from what I have read, it seems as though nested CTEs are not allowed.
Can anyone show me how to do this?
Thanks in advance for ANY insight/input!
Cheers,
Chris
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Feb 14, 2008
Greetings -
Can someone pls advise the maximum number of nested IIF statements allowed in a VS 2005 report builder layout textbox expression? I seem to be hitting a wall at about 10, but cannot find verification. In case the limitation is by characters, the full expression would run about 3,500. Any other limitations which may have a bearing?
Tks & B/R
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Feb 2, 2008
Hi all! I have a problem with my stored procedure, What I'm trying to do here is whenever a user tries to register, the stored procedure will check if the username already exists, and if not it'll now check if the email has already been entered into the database then if not the stored procedure will go ahead and insert the values into the database. *If the username already exists it'll return -1, and if the email already exists then return -2.
SELECT Username FROM UserAccount WHERE Username = @UsernameIF @@ROWCOUNT = 0 SELECT Email FROM UserAccount WHERE Email = @Email
IF @@ROWCOUNT = 0 BEGIN
INSERT INTO UserAccount (Username, Password, Email, FirstName, LastName, Gender, BirthDate, Country, State, Zip, AdditionalInfo)
VALUES (@Username, @Password, @Email, @FirstName, @LastName, @Gender, @BirthDate, @Country, @State, @Zip, @AdditionalInfo)
END
ELSE BEGIN
RETURN -2
END
ELSE BEGIN
RETURN -1
END
END
Thanks!
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Nov 8, 2006
Hi, I'm not sure if this is a good place to ask sql questions, so please bear with me here...I have a table like soid, parentidWhat I'm trying to do is to write a self join where given a random ID, it'll give me the whole tree of its decendents. (I don't need its parent)so say I have data liek soid parentid1 null2 13 2when I specificy 1, it'll give me 2 and 3, even though 3 is indirectly related to 1. when I say 2, it'll just give me 3. Thanks a lot. GREATLY appreicate it.
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Oct 16, 2007
When running reports from data, is it faster using nested views approx 4 levels deep, or writing data to a temp tables then running the report?
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Apr 7, 2008
What's worng, please help? SELECT TTarea,personel,Date FROM person_table WHERE TTarea = (SELECT TTarea FROM TTarea_table WHERE Center='CENTER_office') I have many TTarea and I want to send back from inner SELECT statement but give an error that inner select statement don't return many result.I want to return many result and I display many TTarea in the CENTER_office
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Nov 12, 2003
Hi All,
Im inserting some data into a table and grabbing the new UserID with this statement
SELECT @UserID = @@IDENTITY
I would like to use the @UserID to Execute another SP within the same proc..
..something like this
Exec AnotherSP(@UserId)
But this doesnt seem to be working....Its seems to me that this is a much better approach performance wise rather than returning the UserID to the Business Logic Layer and calling another SP....Im I correct in that assumption....any assistance would be greatly appreciated.
Thanks in advance
AMRITZ
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Jun 12, 2004
I think I am getting an endless loop here... anyone know how to fix it?
***********************
CREATE PROCEDURE TrigSendPreNewIMAlertP2
@REID int
AS
Declare @RRID int
Declare @ITID int
Declare @FS2 int
Declare @FS1 int
Declare crReqRec cursor for
select RRID from RequestRecords where REID = @REID and RRSTatus = 'IA' and APID is not null
open crReqRec
fetch next from crReqRec
into
@RRID
Declare crImpGrp cursor for
select ITID from RequestRecords where RRID = @RRID
open crImpGrp
fetch next from crImgGrp
into
@ITID
while @@fetch_status = 0
select @FS1 = @@Fetch_Status
EXEC TrigSendNewIMAlertP2 @ITID
FETCH NEXT FROM crImpGrp
into
@ITID
close crImpGrp
deallocate crImpGrp
while @@Fetch_Status = 0
select @FS2 = @@Fetch_Status
FETCH NEXT FROM crReqRec
into
@RRID
close crReqRec
deallocate crReqRec
GO
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Apr 30, 2005
Hi,
Although I am quite familiar with MS Access-grade SQL, I am struggling a bit with proper grown up SQL Server. My usual approach to counting things in Access is to first create a query with the conditions on the data, then use this as the basis of a second query that does the actual counting of the presorted data. I believe the way to do this in SQL server is to use a nested query. I want to generate the top 10 highest counts for each pesticide detected (detection is level>0) for a client between two dates.
Currently I am using
<code>
SELECT top 10 Count(Pesticide) AS CountOfPesticide, Pesticide FROM (SELECT tblData.Pesticide, tblData.Level, tblData.Clast, tblData.Client FROM tblData WHERE (((tblData.Day>@sdate) AND (tblData.Day<@edate))) and (tbldata.level>0) and (tbldata.clast=@clast) and (tbldata.client=@client)) as monkeyboy GROUP BY Pesticide ORDER BY Count(Pesticide) ASC"
</code>
The results that the above SQL turns out though are not reliable. For example, if I set the dates to now and 14 days ago, it produces higher counts for some pesticides then if I set the dates to now and 30 days ago. Any pointers or general advice about nested sql is gratefully accepted!
thanks
Mike
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Sep 13, 2005
Hi,Please can somone help me with a nested SQL query. I have two tables please see belowTable 1CallIDEmployeeIDCallSummaryCallStatusTable 2CallHistoryIDCallIDDataAddedCallActionI would like to return the CallID, EmployeeID, CallSummary and CallStatus from Table 1, and also display the last CallAction from Table 2.This is a helpdesk database so a Call will have many CallActions i.e. Open, Held, Assigned Internal. How do I return the last CallAction Added against the selected CallID, I know I use the DateAdded but not sure about nested statements.The results I would like to return to the user would look like this:-Call ID: 1EmployeeID: 1Call Sumary: SQL ProblemCall Status: OpenCall Action (Last Action): Assigned Internal.
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Sep 26, 2005
Hi all,
I have a temp guy who is doing some work for us (seriously, I never wrote the query).
Now this is the scenario (hold tight). So we have a stored procedure as follows...
ALTER PROCEDURE createSegmentPoints AS
DECLARE @fLat INTEGER
DECLARE @fLon INTEGER
DECLARE @segId INTEGER
-- declare cursor to return the from lat and lon for all segments that do not have address point 109.
DECLARE c1 CURSOR FOR (SELECT From_Latitude, From_Longitude, id AS segment_id FROM Segments WHERE SegmentType != 109)
OPEN c1
FETCH NEXT FROM c1 INTO @fLat, @fLon, @segId
WHILE @@FETCH_STATUS = 0
BEGIN
-- insert into table the segId, from lat, from lon and returned segment id from function.
INSERT INTO test VALUES (@segId,@fLat,@fLon,dbo.points_test(@fLat,@fLon))
FETCH NEXT FROM c1 INTO @fLat, @fLon, @segId
END
CLOSE c1
DEALLOCATE c1
As you can see here I am using a Cursor, which in turn calls a function
with each row that is processed in the recordset. The function that is
called is as follows...
ALTER FUNCTION points_test(@x INTEGER, @y INTEGER)
RETURNS INTEGER
AS
BEGIN
-- function to find the closed segment point with address point 109 to the segment specified in procedure.
DECLARE @tempDistance FLOAT(4)
SET @tempDistance = 1000000
DECLARE @id, @seg, lat, lon INTEGER
DECLARE @distance, @xd, @yd FLOAT
DECLARE c1 CURSOR FOR (SELECT from_latitude, from_longitude, id FROM segments WHERE segmenttype = 109)
OPEN c1
FETCH NEXT FROM c1 INTO @lat, @lon, @id
WHILE @@FETCH_STATUS = 0
BEGIN
-- calucations to get distance.
SET @xd = (@lat-@x)
SET @yd = (@lon-@y)
SET @distance = SQRT((@xd*@xd) + (@yd*@yd))
-- test if you have shortest distance.
IF (@distance < @tempDistance)
BEGIN
SET @tempDistance = @distance
SET @seg = @id
END
FETCH NEXT FROM c1 INTO @lat,@lon, @id
END
CLOSE c1;
DEALLOCATE c1;
RETURN @seg
END
(This function works out an equation to get the shortest distance from
two parameters passed to the function calculated with data from each
row returned within the cursor)
As you can see here, this function contains ANOTHER cursor!! Ouch. The
fact that their is an SQL query in a function is a killer, but having
another embedded cursor there is also a killer - this has virtually
killer the application.
So, how best is it for me to correct this. Should I turn the function
into a stored procudure? But even if I do this, the nested cursor still
remains. I was thinking maybe to have the SQRT equations within the
SELECT expression and then wrapped in a MIN() to maybe get the lowest
value.
Any ideas would be of great help.
Thanks
Tryst
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Mar 20, 2002
Guys,
Has anybody out there successfully nested roles?
SQL Server seems to let you do it, but then no permissions are carried up the hierarchy.
Regards,
ChrisH
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Oct 22, 1999
Hello;
I have a question why does not the following nested transaction work?
begin tran
insert into t1 values('A')
begin tran
insert into t2 values('1')
commit
insert into t3 values('B')
begin tran
insert into t2 values('2')
commit
rollback
The rollback is rolling back everything.
Thanks
Nathan
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Oct 21, 1999
I have a situation where I have two cursors: outer_cursor and inner_cursor. The inner_cursor is supposed to execute based on a value passed on from outer_cursor. It is not running as desired. At runtime, it complians that the inner_cursor is not open.
Thanks
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Oct 4, 1999
Hi,
I want to write one query which will select multiple distinct records from one table
For e:g
Lets say in a table i have 3 fields name,tel_no,sex
Now i want to list all the records which are distinct in each of these fields
like distinct name,distinct address
IS IT POSSIBLE and if yes HOW
Thanks
Ashish
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Jun 27, 2007
Hi. newbie here.
Also new to coding in SQL.
Struggling with how to implement the following psuedo-code in SQL server 2000.
** Can you use more than one CURSOR variable?
If yes, when use FETCH_STATUS is it for cur1 or cur2 ??
Sample data is at the bottom.
Thanks for ANY suggestions !!
** Assume TABLE 1 is sorted by Record_Type, Order_no, Order_line_no
************************************************** ***
dim @rectyp
dim @ord#
dim @lin#
Fetch (?) 1st record in TABLE1
While Still Records in TABLE1
Set sub_line# = 0
set @rectyp = Record_Type,
set @ord# = Order_no,
set @lin# = Order_line_no
while @rectyp = Record_Type and
@ord# = Order_no and
@lin# = Order_line_no
Set sub_line# = sub_line# + 1
update TABLE1 set line_ctr = sub_line#
get next record
end inner WHILE
end outer WHILE
************************************************** ****************************
Sample data :
Data as it currently exists:
Record_type ......Order No......Order line no ......Line Ctr
OP.....................458001................5.... ...............0
OP .....................458001..............5 .................. 0
OP..................... 458001..............5..................0
OP .....................458001..............5........ ..........0
OP.....................458191..............1 ..................0
OP.....................458191..............1 .................. 0
OP..................... 458308..............73..................0
OP .....................458308..............73....... ........... 0
OP.....................458308..............73..... .............0
OP.....................458308..............73..... .............0
Want data to look like this after executing code:
Record_type ......Order No......Order line no ......Line Ctr
OP.....................458001................5.... ...............1
OP .....................458001..............5 .................. 2
OP..................... 458001..............5..................3
OP .....................458001..............5........ ..........4
OP.....................458191..............1 ..................1
OP.....................458191..............1 .................. 2
OP..................... 458308..............73..................1
OP .....................458308..............73....... ........... 2
OP.....................458308..............73..... .............3
OP.....................458308..............73..... .............4
************************************************** *********************
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Jan 10, 2005
What's wrong with this...
Code:
SELECT case when tab1.col2=tab1.col3 and tab1.col3!=0
then (SELECT tab3.col3 FROM tab3)
else (case when tab5.col2=tab5.col6
then (SELECT tab7.col1 FROM tab7)
else (case when tab1.col2=tab1.col3 then tab1.col4+7 end)
end as value
From tab5, tab1
WHERE tab1.col1=tab5.col1
I get the error as-
Server: Msg 156, Level 15, State 1, Line 6
Incorrect syntax near the keyword 'as'.
please help me.
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Mar 15, 2005
I have this table record:
PHP Code:
ID | NUMBER | DSTART | DEND | ADDRESS |
----------------------------------------------------------------
1 | 9524123 | 12 Dec 95 | 24 Dec 95 | London |
2 | 9524123 | 06 Jan 96 | 15 Jan 96 | Paris |
3 | 084521 | 12 Mar 96 | 15 May 96 | New York |
4 | 084521 | 22 Aug 96 | 25 Aug 96 | Sidney |
---------------------------------------------------------------
Now, I need to build a query to show only the latest DTSTART date
for each NUMBER. The result would be something like this:
PHP Code:
ID | NUMBER | DSTART | DEND | ADDRESS |
----------------------------------------------------------------
2 | 9524123 | 06 Jan 96 | 15 Jan 96 | Paris |
4 | 084521 | 22 Aug 96 | 25 Aug 96 | Sidney |
---------------------------------------------------------------
Can you guys help me to build the queries? Thanks in advance.
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