Nested Loop In SQL Query

Nov 1, 2005

Hi,I'm probably missing something obvious (either that or doing this totally wrong).I'm trying to use a nested loop to generate the following results:Unit          Day1         Day2           Day3        Day4          Day5Name1     25             45               89             54              76Name2     48             54               81             74              98What I have so far is this:WHILE @FCount < @TotalFoodUnitsBEGINSELECT (SELECT Unit FROM tbl_acc_FoodVenues WHERE UnitID = (@FCount + 1)) AS Unit  WHILE @FDCount < @Days BEGIN SELECT  (SELECT FdRevenue_a FROM tbl_acc_aud_SportsAudits WHERE AudDate = DATEADD(day, @FDCount, @pdStartDate)) AS Rev  SET @FDCount = @FDCount + 1 END SET @FCount = @FCount + 1ENDAny suggestions please

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Imitating Nested For Each Loop In SQL Query

May 25, 2007

Dear All,

I need to create a query to list all the subfolders within a folder.

I have a database table that lists the usual properties of each of the folder.

I have another database table that has two columns

1. Parent folder
2. Child folder

But this table maintains the parent child relationship only to one level.

For example if i have a folder X that has a subfolder Y and Z.
And Y has subfolders A and B.
and B has subfolder C and D
and C has subfolder E and F

The database table will look like

parentfolder child folder
X Y
X Z
Y A
Y B
B C
B D
C E
C F

I want to write a query which will take a folder name as the input and will provide me a list of all the folders and subfolders under it. The query should be based on the table (parent - child) and there should not be any restriction on the subfolder levels to search and report for.

I have been banging my head to do this but i have failed so far. Any help on this will be highly appreciated.

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Dec 10, 2004

Hi there. I want to avoid a cursur using a quite basing nested while loop. The problem is, that the outer index-variable (i) won't increment at all while the inner loop works perfectly.

This one should be quite easy to solve I guess, I'd be very happy if someone could give me a hint what I should try, though because I don't know what to try. The manual didn't help me much either, using CONTINUE and BREAKs didn't solve this problem for me.

My code:
DECLARE @i INTEGER
DECLARE @j INTEGER
SET @i = 1
SET @j = 0

WHILE(@i<= 10) BEGIN
WHILE(@j <= 100) BEGIN
SELECT @i, @j, COUNT(*) as anz FROM mytable WHERE dim1 = @i AND dim2 = @j
SET @j = @j + 1
END
SET @i = @i + 1
END

Thanks a lot for your help :)
Bernhard

corrected typo...

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Jul 30, 2007

I want to know how to create a recursive loop/function in SQL, I can’t seem to figure out how to do it. 
The database table I am working with is simply the following: 
SeedID, ThisParentSeedID
1, 0
2, 1
3, 1
4, 2
5, 4
6, 5
7, 6
8, 7
9, 7
10, 7
11, 10
12, 0
13, 0
14, 0 
The example table above shows that SeedID 1 = the parent level of the data. SeedID 2 and 3 are children of SeedID 1, 4 is child of 2, 5 is child of 4... 12 13 and 14 are also parent levels (they are not children of anything).  
I want to know how to create a SQL script that is “object orientedâ€? in that I will not have to create as many levels of nested scripts as there are nested “childrenâ€? in the data.  
What I am wanting to figure out is, with a single script, “which sub-children are assigned to [@SeedID]â€?? So if this script was called, and @SeedID = 1, it would return (2,3,4,5,6,7,8,9,10,11). If @SeedID = 12, it would return null. If @SeedID = 7, it would return (8,9,10,11)  
I have tried to keep my question and data as simple as possible for the sake of getting some feedback or help. If you want me to clarify or explain better, please ask me to!

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Jan 26, 2006

Hi,

I have came across a situation -
When there are no indices on the tables and if we force SQL server to use the "Nested Loop" joins, the query becomes very slow. Since there are no indices then Nested loop join should not be used.

The background for this problem is -
Analysis services is sending some query to SQL server while doing the cube processing. SQL server is using Nested loop joins even though there are no indices on any of the tables. Is there any way by which we can force the SQL server/Analysis services not to use Nested loop joins since there are no indices in any of the tables.

regards,
datta.

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Jan 26, 2006

Hi,

I have came across a situation -
When there are no indices on the tables and if we force SQL server to use the "Nested Loop" joins, the query becomes very slow. Since there are no indices then Nested loop join should not be used.

The background for this problem is -
Analysis services is sending some query to SQL server while doing the cube processing. SQL server is using Nested loop joins even though there are no indices on any of the tables. Is there any way by which we can force the SQL server/Analysis services not to use Nested loop joins since there are no indices in any of the tables.

regards,
datta.

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Mar 31, 2006

i'm running the following code on Ms SQL Server 2000, Query Analyzer to analyze the result of Nested Loop Join.

SET STATISTICS PROFILE ON
GO
SELECT pdN.ProductID, pdN.ProductName,
spN.CompanyName, spN.ContactName
FROM dbo.ProductsNew pdN
INNER JOIN dbo.SuppliersNew spN
ON pdN.SupplierId = spN.SupplierId
GO

but the execution plan give me the following result :-

http://i31.photobucket.com/albums/c366/i3lu3fun/executionplan.jpg

instead of using nested, why does it using hash join? is there anything wrong with my code?

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Jul 20, 2005

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Jul 20, 2005

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Dec 20, 2007

I have two queries that seem to be the same, but perform very differently. The first query runs very fast (7000+ records returned in <1 sec.). The execution plan shows that it uses a nested loop with index seeks on both tables.

select *
from t_loadbasic

where ld_nbr in (select ld_nbr from t_tripcombined where comp_date between '11/1/07' and '11/05/07')



The second query is almost the same, save the fact that it uses date variables instead of hard dates. The execution plan shows that it uses a hash match instead of a nested loop with an index scan on the main table (t_loadbasic). This query takes about 12 seconds to run.


declare @startdate datetime


,@enddate datetime


set @startdate = '11/1/07'

set @enddate = '11/5/07'


select *
from t_loadbasic

where ld_nbr in (select ld_nbr from t_tripcombined where comp_date between @startdate and @enddate)

I'm trying to figure out why the database executes these two statements so differently. BTW, I've tried switching the order of the tables. I've tried using joins instead of a subquery. The execution plan seems completely dependant on the use of variables. I can attach the execution plans if necessary.

I apologize if this is too simple a question, but I couldn't find an answer on any forums, web searches or BOL. Thanks in adavance.

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Jan 17, 2008

Hi friends, I've been stumped on this for almost a week now.  Everything works in the stored procedure code below except for the 'INSERT INTO @Uppdates' block of code.  I have a SQL Analyzer test driver and when the code gets to the SELECT statement below the INSERT INTO @Updates line the value of the select line is displayed on the screen and nothing gets written to @Updates.  I hope I'm being clear about this.  Any ideas? IF @Edit=1 AND LEN(@Changes) > 0
BEGIN
--Split and parse changes
DECLARE @curRec int, @nxtRec int, @Record varchar(8000), @TNum int, @TNam varchar(50), @PDesc varchar(512), @PChk varchar(8), @SNum varchar(12), @NScr varchar(10), @OScr varchar(10),
@curField int, @nxtField int, @curSRec int, @nxtSRec int, @subRec varchar(8000), @curSField int, @nxtSField int

DECLARE @NewProj table (
ProjectID int,
SchoolNumber varchar(20),
ArtTeacherNumber int,
TeacherNumber int,
TeacherName varchar(40),
ProjectDescription varchar(512) NULL,
[Checksum] varchar(20) NULL)

DECLARE @Updates table (
ProjectID int,
StudentNumber varchar(12),
NewScore varchar(10) NULL,
OldScore varchar(10) NULL)

SET @curRec = 1

WHILE @curRec IS NOT NULL
BEGIN
SET @nxtRec = NULLIF(CHARINDEX(CHAR(1), @Changes, @curRec), 0)
SET @Record = SUBSTRING(@Changes, @curRec, ISNULL(@nxtRec,8000)-@curRec) --Extract a class record
SET @curField = 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @TNum = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Teacher Number
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @TNam = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Teacher Name
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @PDesc = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Project Description
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(3), @Record, @curField), 0)-- Step over existing checksum
SET @PChk = RIGHT('0000000' + dbo.int2base(Checksum(@PDesc),16),8)-- Calculate new checksum based on project description that may have been changed.
SET @curField = @nxtField + 1

INSERT INTO @NewProj (ProjectID, SchoolNumber, ArtTeacherNumber, TeacherNumber, TeacherName, ProjectDescription, [Checksum])
SELECT DISTINCT Students.ProjectID, @SchoolNumber, @ArtTeacherNumber, @TNum, @TNam, @PDesc, @PChk
FROM @Students Students
WHERE Students.SchoolNumber=@SchoolNumber AND Students.TeacherNumber=@TNum

SET @curSRec = 1
WHILE @curSRec IS NOT NULL
BEGIN
SET @nxtSRec = NULLIF(CHARINDEX(CHAR(3), @Record, @curField), 0)
SET @subRec = SUBSTRING(@Record, @curField, ISNULL(@nxtSRec,8000)-@curField) -- Extract a score sub record. Consists of Student Number, new Score, old Score.
SET @curSField = 1
SET @nxtSField = NULLIF(CHARINDEX(CHAR(4), @subRec, @curSField), 0)
SET @SNum = SUBSTRING(@subRec, @curSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract Student Number
SET @curSField = @nxtSField + 1
SET @nxtSField = NULLIF(CHARINDEX(CHAR(4), @subRec, @curSField), 0)
SET @NScr = SUBSTRING(@subRec, @curSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract new Score
SET @curSField = @nxtSField + 1

IF @curSField > LEN(@subRec)
SET @Oscr = NULL-- If no Old Score specified
ELSE
BEGIN
SET @nxtSField = LEN(@subRec) + 1
SET @OScr = SUBSTRING(@subRec, @CurSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract old Score
END

-- Check for errors
IF ISNUMERIC(@SNum) = 0 OR @NScr IS NULL OR LEN(ISNULL(@PChk,0)) <> 8
BEGIN
SET @UpdateErr = 1
BREAK
END

-- Update the updates table and find ProjectID from existing data table
INSERT INTO @Updates (ProjectID, StudentNumber, NewScore, OldScore)
SELECT DISTINCT Students.ProjectID, @SNum, @NScr, @OScr
FROM @Students Students
WHERE Students.StudentNumber=@SNum

SET @curField = @nxtSRec + 1
SET @curSRec = @nxtSRec + 1
select * from @Updates
END
IF @UpdateErr = 1
BEGIN
BREAK
END
SET @curRec = @nxtRec + 1
END
 Thanks in advance for looking at this, 

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How can I generate the following result using nested loop and variables :

col1col2
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16
17
25
26
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36
37
45
46
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FROM...
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Hi,

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Ashish

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Important Tables:
Product (table of products)
--ProductID
--ProductName

ProductCategories (Associates a Product with one or more categories)
--ProductID
--CategoryID

Category (table of categories that a product may fall under)
--CategoryID
--CategoryName

Information:

Basically I have a product that falls into two categories. Therefore there are two records in the ProcuctCategories Table. I am trying to create a query that will find all products that are in categories 1 & 2.

Attempted Solution:
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AND
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This returned zero records though it should have returned the product that is in categories 1&2.

I would appreciate any help available.

Thank you,
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Nov 15, 2001

I am trying to write a query that does not use inner joins to see if it returns rows faster than a query using inner joins.
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Can I nest Exists in a Where clause?
If so how is the 2nd exists statement added to the query?
see my sample query below
================================================== ===
'With 2 tables

SELECT DISTINCT s1.ID, s1.SITE
FROM SITE_TBL s1
WHERE EXISTS (SELECT *
FROM DEVICE_TBL d1
WHERE s1.ID = d1.SITE_ID AND d1.DELETEFLAG <> 'D')
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So, here is the data layout.

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Database 2, Table 1 contains CustID, ShipID, Address, City, State, Zip,
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So the first question is how should the stored proc look with an input
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Secondly, which database should the stored proc reside?

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Hi All,

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SELECT Description, Sum(Total) FROM (
SELECT Description, Total FROM Table_A
UNION ALL
SELECT Description, Total FROM Table_B
UNION ALL
SELECT Description, Total FROM Table_C
)
GROUP BY Description


The group of unions work by themselves, but when I try to nest an outer query to do some a Summation(), I have syntax errors.

Any insight would be greatly appreciated. Thank you.

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Nested Query (Urgent)

Feb 17, 2004

Folks

I have two queries

Select Account_Id , Branch_Cd from Accounts

SELECT SUM (dbo.HOLDING.Shares_Par_Value_Qty * dbo.ASSET.Current_Prc) AS MarketValue
FROM dbo.HOLDING INNER JOIN
dbo.ASSET ON dbo.HOLDING.Property_Num = dbo.ASSET.Property_Num
Group by dbo.HOLDING.Account_ID

Account_ID is the same in both the queries ie in both the tables
Holding and Account.


I need the output like this


Select Account_Id, Branch_Cd, MarketValue from -------



But MarketValue should be calculated exactly in the above method.
How do I combine these two queries. I need it asap.
Help me out.



Thanks

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Nested Query Or A Join?

Feb 8, 2007

I have a database that contains a PERSONNEL table, a VISIT table, and a STARSHIP table.
I am trying to generate a single column list of the personnel that are from Vulcan (PERSONNEL.PLANET) and all starships that have visited Vulcan (VISIT.PLANET). VISIT.SHIP and STARSHIP.REGISTRY columns contain the ships identifiers. How would I accomplish this? I am just beginning sql so please be nice ;)

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Nested Query Or Should I Use Over Partition Perhaps?

Nov 7, 2007

I have the following result set #1 from the query below. As you can see, there are four different provider roles and four different physicians listed for the same case (acctnum). Is there a way I could add a nested select (or other method) which would allow me to list this case as one line item to appear in the manner of result set #2?

RESULT SET #1 (the results of the query I have now)














MRN
ACCTNUM
PTNAME
AGE
ADMDT
DISCHDT
LOS
PROVIDER_CODE
PROVIDER_ROLE
PHYSNAME

12345
11111117777
DOE, JANE
48
Nov 29 2006
Nov 30 2006
1
10
ANE1
MILLER DR.

12345
11111117777
DOE, JANE
48
Nov 29 2006
Nov 30 2006
1
20
ADM
MAY DR.

12345
11111117777
DOE, JANE
48
Nov 29 2006
Nov 30 2006
1
30
ATT
SCHULTZ DR.

12345
11111117777
DOE, JANE
48
Nov 29 2006
Nov 30 2006
1
35
PRIN
THOMAS DR.

RESULT SET #2 (this is how I desire the results to look)














MRN
ACCTNUM
PTNAME
AGE
ADMDT
DISCHDT
LOS
ANE1PHYS
ADMPHYS
ATTPHYS
PRINPHYS

12345
11111117777
DOE, JANE
48
Dec 13 2006
Dec 14 2006
1
MILLER DR.
MAY DR.
SCHULTZ DR.
THOMAS DR.


Select

e.medrec_no,

e.account_number,

Isnull(ltrim(rtrim(pt.patient_lname)) + ', ' ,'')

+

Isnull(ltrim(rtrim(pt.patient_fname)) + ' ' ,'')

+

Isnull(ltrim(rtrim(pt.patient_mname)) + ' ','')

+

Isnull(ltrim(rtrim(pt.patient_sname)), '')

AS SRM_PatientName,

pm.PatientAge,

left(e.admission_date,11) as Admit_Date,

left(e.episode_date,11) as Disch_Date,

(CASE WHEN DATEDIFF(DAY, e.admission_date,e.episode_date) = 0 Then 1

ELSE DATEDIFF(DAY, e.admission_date,e.episode_date) END) AS LOS,

epi.PROVIDER_CODE,

epi.PROVIDER_ROLE,

pe.PERSON_NAME as physician_name,

From srm.episodes e inner join

dbo.PtMstr pm on pm.accountnumber=e.account_number inner join

srm.ITEM_HEADER ih ON ih.ITEM_KEY = e.EPISODE_KEY INNER JOIN

srm.PATIENTS pt ON pt.PATIENT_KEY = ih.LOGICAL_PARENT_KEY inner join

srm.CDMAB_PROV_EPI epi on epi.episode_key=e.episode_key inner join

srm.providers p on p.provider_key = epi.provider_key inner join

srm.person_element pe on pe.item_key = p.provider_key

Where e.episode_date is not null and pm.AnyProc like '%4495%'

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Nested Query Question

Mar 17, 2008

I guess I need help in understanding how to do the nested query option and see what works here and what doesn't.

Lets go with some psudo code

SELECT Col1, Col2, COUNT(*) AS Expr1 FROM Table1 INNER JOIN Table2 ON Table1.Col2 = Table2.Col1

Why doesn't the following work, is there a work around?

SELECT Col1, Col2, COUNT(*) AS Expr1, (SELECT COUNT(*) FROM Table2) As Expr2 FROM Table1 INNER JOIN Table2 ON Table1.Col2 = Table2.Col1

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Configuring SQLdataadapter With Nested Query.

Aug 14, 2007

 
How to configure sqldatadapter with query like
 "select name ,id from tlb1 where id in (select id from tlb2 where dept=@dept)"
   Is the nested subquery is not allowed while  configuring sqldaadapter?
  Swati
 
 

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How To Write A Nested GROUP BY Query, Please Help.

Jun 6, 2004

Use Pubs
SELECT pub_id, type, SUM(price) as Total_price
FROM titles
GROUP BY pub_id, type

The above query returns the following resultset:


0736business 2.9900
1389business 51.9300
0877mod_cook 22.9800
1389popular_comp42.9500
0736psychology 45.9300
0877psychology 21.5900
0877trad_cook 47.8900
0877UNDECIDED NULL


Now I want to add another "Group By" on type, so I tried:

Select type, sum(Total_Price) from
(SELECT pub_id, type, SUM(price) as Total_Price
FROM titles
GROUP BY pub_id, type)
Group By type

But I got error: Incorrect syntax near the keyword 'Group'. How can I write such a nested group by query.

Thanks in advance for any help.

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Nested Query With Distinct Function

Jan 12, 2015

I need to know how many widgets are located at each factory.

I have a table called "Widgets". The pertinent column(s) are:

Factory UID

By using only this table I can group the results by the FactoryUID to get the answer. However, this table does not tell me the factory name.

I have a table called "Factories". The pertinent column(s) are:

FactoryUID
FactoryName

I can join these two tables by the FactoryUID. But I don't know how to write this query so that my results will look like the following table:

FactoryName Widgets
Factory1 100
Factory2 200
Factory3 300

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May 12, 2008

I'd appreciate some help with the issue below - my SQL is a bit rusty and was never that hot to be frank. I'm using SQL Server 2000 (although have a test box with 2005 Express also). I've trawled MSDN and a few forums but can't find the solution (maybe I don't know what I'mm looking for!), so any help would be marvellous...

I have a table with a field called 'IRV' containing a string of comma-separated values. I want to be able to query a point in that string and count the number of times a given value appears. So...as an example, I want to count how many times '1' appears at position 7 in the IRV. I can create SQL to do this as follows:


SELECT COUNT(X) AS is1
FROM myIRVtable
WHERE (SUBSTRING(IRV, 7, 1) = '1')


So far so good. However, it is also possible that the value at position 7 in this string could be '2' (or '3', or '4', etc) - and rather than re-running the query again and again to get these values, I'd like to do it in one hit.

How can I combine all this together - anyone have any brilliant solutions?

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Nested Scalar Query Problem

Jan 31, 2008



I'm having a trouble with a nested scalar query

I have a table that refers to itself, and I need to loop through it to get the total number of entries in the structure with an object_type of 40 this is the function I came up with to do this. The problem is that the nested function doesn't seem to get called.




Code Snippet
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Collections.Generic;
using Microsoft.SqlServer.Server;

public partial class StoredProcedures
{
private struct PerformanceCriteriaCounter
{
public PerformanceCriteriaCounter(int id, string objecttype)
{
Id = id;
Object_Type = objecttype;
}
public int Id;
public string Object_Type;
}

[Microsoft.SqlServer.Server.SqlProcedure(Name = "usp_PerformanceCriteriaCounter")]
public static int CountPerformanceCriteria(int ParentID, int SourcePosition)
{
using (SqlConnection conn = new SqlConnection("context connection=true"))
{
int Counter = 0;
int Counter2 = 0;
SqlContext.Pipe.Send("Called with ParentID=" + ParentID + " SourcePosition=" + SourcePosition);
conn.Open();
using (SqlCommand myCommand = conn.CreateCommand())
{
myCommand.CommandText = @"SELECT CompetenceLearningObject.Object_Type, CompetenceLearningObject.LearningObject_ID
FROM CompetenceLearningObjectParent INNER JOIN
CompetenceLearningObject ON CompetenceLearningObjectParent.LearningObject_ID = CompetenceLearningObject.LearningObject_ID
WHERE (CompetenceLearningObjectParent.Approved = 1) AND (CompetenceLearningObject.Archived = 0 OR
CompetenceLearningObject.Archived IS NULL) AND (CompetenceLearningObject.Approved_Status = 1) AND
(CompetenceLearningObjectParent.Parent_ID = @ParentID) AND (CompetenceLearningObjectParent.Position_ID = @SourcePosition)";
myCommand.Parameters.AddWithValue("@ParentID", ParentID);
myCommand.Parameters.AddWithValue("@SourcePosition", SourcePosition);
List<PerformanceCriteriaCounter> loList = new List<PerformanceCriteriaCounter>();
SqlDataReader reader = myCommand.ExecuteReader();
while (reader.Read())
{
SqlContext.Pipe.Send("Adding item");
loList.Add(new PerformanceCriteriaCounter(int.Parse(reader["LearningObject_ID"].ToString()), reader["Object_Type"].ToString()));
}
reader.Close();

foreach (PerformanceCriteriaCounter lo in loList)
{
SqlContext.Pipe.Send("Testing item, ObjectType =" + lo.Object_Type);
if (lo.Object_Type == "40")
{
SqlContext.Pipe.Send("Incrementing counter");
Counter++;
}
else
{
SqlContext.Pipe.Send("Calling procedure with ParentID=" + lo.Id + " and Position=" + SourcePosition);
using (SqlCommand myCommand3 = conn.CreateCommand())
{
myCommand3.CommandType = CommandType.StoredProcedure;
myCommand3.CommandText = "usp_PerformanceCriteriaCounter";
myCommand3.Parameters.AddWithValue("@ParentID", lo.Id);
myCommand3.Parameters.AddWithValue("@SourcePosition", SourcePosition);
object objValue = myCommand3.ExecuteScalar();
if (objValue != DBNull.Value)
{
Counter2 = Convert.ToInt32(objValue);
SqlContext.Pipe.Send("It's not null value=" + Counter2.ToString());
Counter = Counter + Counter2;
}
}
}
}
}
return Counter;
}
}
}






This is the output from SQL Server when I call the function.



Code Snippet
Called with ParentID=1 SourcePosition=89
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Adding item
Testing item, ObjectType =30
Calling procedure with ParentID=2 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=3 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=4 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=5 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=6 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=7 and Position=89
It's not null value=0
Testing item, ObjectType =30
Calling procedure with ParentID=8 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=9 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=10 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=11 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=12 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=13 and Position=89
It's not null value=0
Testing item, ObjectType =20
Calling procedure with ParentID=14 and Position=89
It's not null value=0





You can see it adding and checking the values and attempting to call itself, but it never seems to get re-called, any ideas?

Cheers

Jon

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Problem With WHERE On ROW_NUMBER When Using Nested Query

Sep 11, 2007

Hi,

I am trying to limit a result set by ROW_NUMBER. However, I am having problems getting it working.

The following query works fine, and I get a result set with PollID, AddedDate and RowNum columns.


SELECT *, ROW_NUMBER() OVER (ORDER BY Results.AddedDate DESC) AS RowNum FROM



( SELECT DISTINCT p.PollID, p.AddedDate

FROM vw_vs_PollsWithVoteCount p

JOIN vs_PollOptions o ON p.PollID = o.PollID

) AS Results

However, as soon as I add a WHERE condition:


SELECT *, ROW_NUMBER() OVER (ORDER BY Results.AddedDate DESC) AS RowNum FROM



( SELECT DISTINCT p.PollID, p.AddedDate

FROM vw_vs_PollsWithVoteCount p

JOIN vs_PollOptions o ON p.PollID = o.PollID

) AS Results

WHERE RowNum BETWEEN 1 AND 10


The query fails with an ' Invalid column name 'RowNum' ' error.

I have tried using 'Results.RowNum' but I get the same problem.


I don't understand what the issue is. The result set has a column headed 'RowNum' so why can't I apply a WHERE clause to this column? I can apply WHERE to the PollID column, for example, with no problem.

Any help very much appreciated.

Thanks...

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Table Update With Count In Nested Query

Oct 8, 2012

I have added some SQL to an Access form which updates the dbo_BM_Map table when the user hits the Apply button. There is a temp table with various fields, two being "Chapter_No" and "Initial_Mapping_Complete" which the update is based on.

I want this update to only apply to chapters that only have one name in the "Initial_Mapping_Complete" column. If a chapter has more than one then the update should ignore it. The attached screengrab shows you. The update should ignore chapter 19 as there are two people (Jim and James) in the Initial_Mapping_Complete field. Here is my code.

pdate dbo_BM_Map inner Join Temp_Progression_Populate
on dbo_BM_Map.Product_ID = Temp_Progression_Populate.Product_ID
Set dbo_BM_Map.Initial_Mapping_Complete = Temp_Progression_Populate.Initial_Mapping_Complete
Where dbo_BM_Map.Chapter_No = Temp_Progression_Populate.Chapter_No
And Temp_Progression_Populate.Initial_Mapping_Complete in
(Select count(Initial_Mapping_Complete), Chapter_No
from Temp_Progression_Populate
Group by Chapter_No
Having Count(Initial_Mapping_Complete) = 1)

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