How Do I Write A Query (which Uses A Union) Suitable For Paging

Aug 13, 2007

How do I write a query (using a union) suitable for paging

I currently have a query which results from two queries combined by a union. It returns 3000 rows. I want to replace that query with one which returns only 50 rows from the relevant page [using ROW_NUMBER()].

Is there a way to do this with only 1 CTE or will I need to use two consecutive CTEs [the first get a union on the queries and the second to apply ROW_NUMBER()]. I can't see a way of doing it with only 1 CTE table.

Alternatively is there a very efficient way to do it using derived tables?

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Paging Query

Aug 2, 2006

I have created a stored proc for paging on a datalist which uses a objectDataSource.
I have a output param itemCount which should return the total rows. Them I am creating a temp table to fetch the records for each page request. My output param works fine if I comment out all the other select statements. But returns null with them. Any help would be appreciated.
CREATE PROCEDURE [dbo].[CMRC_PRODUCTS_GetListByCategory]( @categoryID int, @pageIndex INT, @numRows INT, @itemCount INT OUTPUT )AS
SELECT @itemCount= COUNT(*) FROM CMRC_Products where CMRC_Products.CategoryID=@categoryID  Declare @startRowIndex INT; Declare @finishRowIndex INT; set @startRowIndex = ((@pageIndex -1) * @numRows) + 1; set @finishRowIndex = @pageIndex * @numRows
DECLARE @tCat TABLE (TID int identity(1,1),ProductID int, CategoryID int, SellerUserName varchar(100), ModelName varchar(100), Medium varchar(50),ProductImage varchar(100),UnitCost money,Description varchar(1500), CategoryName varchar(100), isActive bit,weight money)
INSERT INTO @tCat(ProductID, CategoryID,SellerUserName,ModelName,Medium,ProductImage,UnitCost,Description,CategoryName, isActive,weight)SELECT     CMRC_Products.ProductID, CMRC_Products.CategoryID, CMRC_Products.SellerUserName, CMRC_Products.ModelName, CMRC_Products.Medium,CMRC_Products.ProductImage,                       CMRC_Products.UnitCost, CMRC_Products.Description, CMRC_Categories.CategoryName, CMRC_Products.isActive,CMRC_Products.weightFROM         CMRC_Products INNER JOIN                      CMRC_Categories ON CMRC_Products.CategoryID = CMRC_Categories.CategoryIDWHERE     (CMRC_Products.CategoryID = @categoryID) AND (CMRC_Products.isActive = 1)
SELECT    ProductID, CategoryID,SellerUserName,ModelName,Medium,ProductImage,UnitCost,Description,CategoryName, isActive,weightFROM         @tCat WHERE TID >= @startRowIndex AND TID <= @finishRowIndexGO

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Apr 29, 2006

let's suppose that we have a table entitled "tab1" which has more than 1000 rows and about 10 columns

so in SQL 2000, if I do this query:

SELECT * FROM tab1

the result will be displaying all the rows from the begining.

and my teacher told me that there's a new option in SQL 2005 which is you can display the result of the query in a page mode.

so can anyone tell me how can I do so for this query:

SELECT * FROM tab1

so that I can see the results in pages.

thanks

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May 31, 2006

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But there's a new TSQL in SQL 2005 "ROW_COUNT" which will help to do the paging. so I have found the procedure but all I need now is to display NEXT and PREVIOUS button in the results in order to switch between the pages. So please any help, Thank you

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Dec 1, 2006

Hello, my table is clustered according to the date. Has anyone found an efficient way to page through 16 million rows of data? The query that I have takes waaaay too long. It is really fast when I page through information at the beginning but when someone tries to access the 9,000th page sometimes it has a timeout error. I am using sql server 2005 let me know if you have any ideas. Thanks
I am also thinking about switch datavase software to something that can handle that many rows. Let me know if you have a suggestion on a particular software that can handle paging through 16 million rows of data.

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May 23, 2007

Hi,I
am working on this select query for a report on website users. The
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want to fetch 100 rows each time. This is the simplified query,
@currpage is passed as a parameter. ________________________________________________________________________________DECLARE @table TABLE (rowid INT IDENTITY(1,1), userid INT)INSERT INTO @table (userid) SELECT userid FROM UsersSELECT T.rowid, T.userid, ISNULL(O.userid, 0)FROM @table TLEFT OUTER JOIN ( SELECT DISTINCT(userid) FROM orders)AS OON O.userid = T.useridAND T.rowid > ((@currpage-1) * 100) AND T.rowid <= (@currpage * 100)ORDER BY T.rowid________________________________________________________________________________If
I run this query it returns all the rows, not just the 100 rows
corresponding to the @currpage value. What am I doing wrong? (The
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Oct 10, 2007

I am getting incorrect results from my paging query, where the same results are being returned multiple times. Here are two queries I have found to bring the same results:select top 20 * from lookupdocuments_dbv where catname_cst='MyCategoryName' and (docid_cin not in (select top 620 docid_cin from lookupdocuments_dbv where catname_cst='MyCategoryName'))select top 20 * from lookupdocuments_dbv where catname_cst='MyCategoryName' and (docid_cin not in (select top 640 docid_cin from lookupdocuments_dbv where catname_cst='MyCategoryName'))When I remove the catname_cst where clause it brings back results properly (i.e. records 622-642 and 643-663). What is wrong with my where clause that is causing identical data to be returned?

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Jul 26, 2007

Hi,

I want to write query to implement paging in sql server ce 3.0. But it seems it does not support TOP or LIMIT keyword.
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Thanks,
van_03

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Jun 28, 2002

Message:

Hi,

Suppose i execute a query,

Select * from emp,

I get 100 rows of result, i want to write a sql query similar to the one available in MySql database where in i can specify the starting row and number of rows of records i want,

something like,

select * from emp LIMIT 10,20

I want all the records from the 10th row to the 20th row.

This would be helpful for me to do paging in the front end , where is i can navigate to the next previous buttons and fetch the corresponding records.

I want to do something like in google, previous next screens.

So I am trying to limit the number of rows fetched from a query.

somethin like,

select * from emp where startRowNum=10 and NoOfRecords = 20

so that i can get rows from 10 to 30.

Has any1 done this, plz let me know.

Cheers,
Prashant.

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Oct 30, 2006

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Oct 17, 2007

I'm new to sql and have come up with a problem and can't seem to find the answer. Most would probably find it simple but I cant get my head around it! :p
I have the following table structure
User_Table-----------User_ID (Key)FirstNameLastName
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User_Table stores all users details and assigns them a User_ID. Users can add other users to their contacts, and this will be stored in Contacts_Table on a one-to-many basis.
*deep breath*... So User_ID in Contacts_Table, will store the User_ID from User_Table, and the Contact_User_ID in Contacts_Table will store the User_ID from User_Table. Does this seem ok? Sorry if I confused everyone!
So my question is, how do I select a user and show all his contacts (names etc)? I thought I could use innerjoin but I dont think it would work here.
Any ideas?
Thanks!

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Hi,

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Jun 11, 2007

In the near future I need to move a 27GB database from SQL2000 to SQL 2005 that is located in a different data center. I can do a backup, copy the .bak file over the WAN and do a restore, but that will take several hours over the WAN. I think the new server will be standalone, not a cluster. We have not purchased it as yet.

What options do I have to minimize downtime? I don't think I can log ship between SQL versions, but I might be able to run two instances of SQL on the new server (2000 and 2005), although I consider that an iffy proposition as well. The OS would be Win2003 sp2 on the new server. What other options do I have? Would mirroring work between versions? Thanks for any suggestions.

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Mar 15, 2006

Hi,

I am given with the responsibility to set up database replication in my organisation.

Before starting the replication set up, I would like to know which is the best suited replication for my application.

My application is much process oriented, and the users are working on records parallely(but with different records).

Say for ex:

There is a module for Insurance claim processing, it is handled in the following manner:

There are many employees with CSR roles, and all are working on some set of records to be processed. But No two employees should get the same record for processing. For that, we are doing locking of the cases by having one column called 'LOCKED_STATUS' and setting value as LOCKED. So that other users wont get the same case. Once the case is processed, the record is marked as unlocked.

My analysis for replication is as follows:

1. Snapshot replication: This wont be a suitable type of replication as the updations are to be immediately updated on all the subscribers, because when the user executes select query to get the next unlocked case, No 2 user should be able to get the same case.

I think, the best replication to chose from is, Transactional replication with Immediate Updation/Queued updation. But the problem is, when one of the subscriber goes offline, the updations are queued up. But in my case, say for ex. One case is updated as locked, but the subscriber is offline and the updations are queued up. At the same time, the other subscriber can fire an select query to get the next unlocked case. Since the update is on queue, there are possibilies for this subscriber to get

the same case.

Can anyone let me know, are the select statements also queued up(i.e., along with update and insert statements.)? If not please let me know how to approach for this problem.

Thanks in advance.

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Mar 27, 2006

I need help with a union query. My table structure is as follows:
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I need a query that will tell the highest value in Current Offer or
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select CurrentOffer as PrevOffer
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How can I get this to work for all CaseFiles? Thanks for your help.

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UNION
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age,qi_vehicle)VALUES (53,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (54,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (55,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (56,1,1,1,1)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (57,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (58,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (59,0,1,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (60,0,1,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (61,1,0,0,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (62,0,1,0,0)INSERT INTO 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age,qi_vehicle)VALUES (72,1,1,1,1)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (73,0,0,1,0)INSERT INTO qt_ins(qi_id,qi_injury,qi_environmental,qi_equipment_dam age,qi_vehicle)VALUES (81,1,0,0,0)GOCREATE VIEW dbo.v_qt_in_typeASSELECT qi_id, 'Injury' AS type FROM qt_ins WHERE qi_injury = 1UNION allSELECT qi_id, 'Environmental' AS type FROM qt_ins WHEREqi_environmental = 1UNION allSELECT qi_id, 'Equipment damage' AS type FROM qt_ins WHEREqi_equipment_damage = 1UNION allSELECT qi_id, 'Vehicle' AS type FROM qt_ins WHERE qi_vehicle = 1GOselect count(*),type from v_qt_in_type group by type---------------------------ENDQUERY--------------------------------------

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UNION ALL Query - HELP!

Jul 20, 2005

I am having conceptual trouble with the following query:select r.ServiceID,r.ContractID,sum(Total)from (selectcsc.ServiceID,c.ContractID, sum(csc.ContainerMovement) as Totalfromiwms_tbl_CustomerSiteContainers csc,iwms_tbl_ContractLines cl,iwms_tbl_Contracts c,iwms_tbl_ContractLinePricing clpwhereclp.ContractLineID = cl.ContractLineID andclp.ContractPriceLineDescription = 'Rental' andclp.ContractPriceLineActive=1 andclp.ContractPriceLineExpiry > getdate() andcsc.ServiceID > 1 andc.ContractID = cl.ContractID andc.ContractStatusCode = 5 andcl.ServiceID = csc.ServiceIDgroup byc.ContractID,csc.ServiceIDunion allselectsi.ServiceID,c.ContractID,sum(j.QuantityCollected) -sum(j.QuantityDelivered)as Totalfromiwms_tbl_Jobs j,iwms_tbl_ServiceInstances si,iwms_tbl_ContractLines cl,iwms_tbl_Contracts c,iwms_tbl_ContractLinePricing clpwhereclp.ContractLineID = cl.ContractLineID andclp.ContractPriceLineDescription = 'Rental' andclp.ContractPriceLineActive=1 andclp.ContractPriceLineExpiry > getdate() andc.ContractID = cl.ContractID andc.ContractStatusCode = 5 andcl.ServiceID = si.ServiceID andj.JobStatusCode <> 80 andj.ServiceInstanceID = si.ServiceInstanceID andsi.ServiceID > 1group byc.ContractID,si.ServiceID) as rgroup byr.ContractID,r.ServiceIDhavingsum(Total) <> 0order by r.ContractIDIt returns 140 rows. However, if I comment out the first selectstatement inside the brackets (select csc.ServiceID,c.ContractID....union all) and run it, it returns 4,785 rows. If I comment out thesecond select statement (union all ...group byc.ContractID,si.ServiceID) it returns 4,786 rows. So why doesn't the*whole* thing return 9,571 rows? That's what I thought a UNION did -append the results of one select to the bottom of the second select.I will supply table defs if it will help, but there's a lot of stuffhere and I think it isn't a data question, but anI-don't-understand-the-SQL question!TIAEdward--The reading group's reading group:http://www.bookgroup.org.uk

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SQL Query Help. UNION ALL

Jan 30, 2008

Hi, I have a question,

Im trying to use the UNION ALL statement to join my results.
I have multiple talbes, each table has the table name as a date: 28_1_2008, 29_1_2008, etc..
Some dates dont have tables.

What I want to do is write an sql query that gets all the results from a rage of dates..

ie. range : 27_1_2008 to 29_1_2008

What im doing :

sql1: Select * from 27_1_2008 UNION ALL select * from 28_1_2008 UNION ALL select * from 29_1_2008.

It works fine if all tables exist, but in my data base every date DOESNT NECESSARLY have a table.

ie. say I have tables 27_1_2008 , 28_1_2008, 30_1_2008

Now if I do

sql2: Select * from 27_1_2008 UNION ALL Select * from 28_1_2008
This works.

But,
sql3: Select * from 28_1_2008 UNION ALL Select * from 29_1_2008 UNION ALL Select * from 30_1_2008

Causes an error, and DOESNT return any records..

I need a way so that even if one particular table doesnt exist, the others should be returned.

i.e in sql3, it should skip the non existing "29_1_2008" table, and return the rest. As of now, it doesnt return anything,

Anyone with some suggestions?

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Union Query?

Feb 8, 2008

I have the following query;

SELECT TOP 1 DateTime, TagName, Value, CONVERT(varchar(15), DateTime, 108) AS Time
FROM v_AnalogHistory
WHERE (DateTime >= CAST(CONVERT(VARCHAR(8), GETDATE() - 1, 112) AS DATETIME)) AND (DateTime < CAST(CONVERT(VARCHAR(8), GETDATE(), 112)
AS DATETIME)) AND (TagName = N'LI_759') AND (wwRetrievalMode = N'delta') AND (CONVERT(decimal(38, 3), Value) IS NOT NULL)
ORDER BY CONVERT(decimal(38, 3), Value), CONVERT(varchar(15), DateTime, 108)

which produces the following:

LI_759
-0.001
13:28:20

The second query;

SELECT TOP 1 DateTime, TagName, Value, CONVERT(varchar(15), DateTime, 108) AS Time
FROM v_AnalogHistory
WHERE (DateTime >= CAST(CONVERT(VARCHAR(8), GETDATE() - 1, 112) AS DATETIME)) AND (DateTime < CAST(CONVERT(VARCHAR(8), GETDATE(), 112)
AS DATETIME)) AND (TagName = N'LI_759') AND (wwRetrievalMode = N'delta') AND (CONVERT(decimal(38, 3), Value) IS NOT NULL)
ORDER BY CONVERT(decimal(38, 3), Value) DESC, CONVERT(varchar(15), DateTime, 108) DESC

Produces the following:

LI_759
0.3661
06:09:30

I have tried the previous answers to this post and none of them worked, i get various errors saying sql is unable to parse. what I would like to have is one query that produces the following:

min:

LI_759
-0.001
13:28:20

max:

LI_759
0.3661
06:09:30

Thank You.

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UNION Query..need Help!!!!!

Apr 17, 2008

currently I am investing some time in learning SQL, I have been working with a sample db, and have come across UNION.
I see many examples showing the same thing, 2 tables with identical datatype and either with a alias or same name. My question is, can a UNION be used for more than 2 tables?
I currently have 3 tables: orders(customerNum,orderNum,orderDate), orderline(orderNum,partNum),
part(partNum,description)
I want to display orderdate and ordernum, only if partNum= 1234 or customerNum= 123
everything is char datatype

I am able to innerjoin, however I am somewhat confused attempting a UNION query. is this possible?
so far

select orders.orderNum,orderDate

from orders,orderline

where orders.orderNum=orderline.orderNum and customerNum='xyz'

union

select orderline.orderNum,part.partNum

from orderline,part

where part.partNum=orderline.partNum and orderline.partNum='abcd'

order by 1

as you can see i am somewhat lost. At the moment the orderDate column is showing partnum and dates. But if someone can show how to make this possible I would greatly appreciate it.

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Suitable Laptop Spec For Running SQL Server Enterprise Edition

Mar 17, 2008

Hi Guys!

I want to buy a laptop, so that I can install and play with the trial SS 2005 Enterprise Edition and hopefully get familiar with SSIS. At work I have only used SS 2000. I want a laptop which will run this with a reasonable speed, but don't want to pay for more juice than is actually required. Does anyone have any advice on what kind of spec would be good enough for SS 2005 Enterprise? If I go for the basics suggested by the system requirements, will it run like a tortoise?

Thanks!!

Clare

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Advanced Union Query

Sep 6, 2004

Hi!

I'm trying to get the following query to work:

SELECT item.name AS name, t15.f167 AS start, t15.f168 AS end, t15.f180 AS organizer
FROM item, t15
WHERE item.row_id = t15.id AND t15.f167 > getDate()
UNION ALL
SELECT item.name AS name, t30.f221 AS start, t30.f222 AS end, '<a class=kalender_link href=http://www.xxx.no/default.asp?V_ITEM_ID=' + item.id
+ '> KAN < / a > '
FROM item, t30
WHERE item.row_id = t30.id AND t30.f221 > getDate()
ORDER BY start DESC

The problem is the organizer field. I need to generate an url, but I get all sorts of problems with data types, ie. you can convert an int into ntext.

So the question is basically, how do I get the following to work:

'<a class=kalender_link href=http://www.xxx.no/default.asp?V_ITEM_ID=' + item.id + '> KAN < / a >'

Vidar

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Problems With UNION-query

Jun 15, 2004

I have a sql statement with 2 SELECT statements combined with the keyword UNION. Something like this

SELECT a, b
FROM ... WHERE ...
UNION
SELECT c, d
FROM ... WHERE ...

If i execute this in the Query Analizer everything works fine and i get the results. But if i execute this through Visual Basic (with database.OpenRecordSet(sql) ) i get following error message:

The Microsoft Jet database engine cannot find the input table or query .... Make sure it exists and that its name is spelled correctly.

If i execute the first part of this combined query in VB (e.g. SELECT a, b FROM ... WHERE ...), no errors occur. The same with the second part.

I find it really strange and any hints and tips are welcome!
thanks in advance.

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Union Query Discrepancy

Jan 26, 2005

When I run the following query with a UNION:

SELECT dbo.TBLCCINFORMATIONOCTOBER04.NAME, dbo.TBLCCINFORMATIONOCTOBER04.TITLE, LOWFARE, ITPSG.TBLCCONLINETOOL.AMOUNT as PRICE, 15 AS Lostsavings, LEFT(dbo.TBLCCINFORMATIONOCTOBER04.CostCtr, 4) AS COMPANYCODE, ITPSG.TBLCCONLINETOOL.InYear, ITPSG.TBLCCONLINETOOL.InMonth, 'TRADITIONAL BOOKING' AS Reason FROM ITPSG.TBLCCONLINETOOL INNER JOIN dbo.TBLCCINFORMATIONOCTOBER04 ON ITPSG.TBLCCONLINETOOL.AWID = dbo.TBLCCINFORMATIONOCTOBER04.AWID AND ITPSG.TBLCCONLINETOOL.InMonth = dbo.TBLCCINFORMATIONOCTOBER04.COLMONTH INNER JOIN dbo.TBLMONTHVALUE ON dbo.TBLCCINFORMATIONOCTOBER04.COLMONTH = dbo.TBLMONTHVALUE.monthname WHERE LEFT(dbo.TBLCCINFORMATIONOCTOBER04.CostCtr, 4) = '1038' AND INYEAR = '2004'AND InMonth = 'OCTOBER' AND (ITPSG.TBLCCONLINETOOL.DESTINATION = 'DOMESTIC') AND (ITPSG.TBLCCONLINETOOL.TYPE = 'TRADITIONAL') UNION SELECT dbo.TBLCCINFORMATIONOCTOBER04.NAME, dbo.TBLCCINFORMATIONOCTOBER04.TITLE, LOWFARE, ITPSG.TBLCCEXCEPTIONS.PRICE as PRICE, ITPSG.TBLCCEXCEPTIONS.Lostsavings AS Lostsavings, LEFT(dbo.TBLCCINFORMATIONOCTOBER04.CostCtr, 4) AS COMPANYCODE, ITPSG.TBLCCEXCEPTIONS.InYear, ITPSG.TBLCCEXCEPTIONS.InMonth, ITPSG.TBLCCEXCEPTIONS.Reason FROM ITPSG.TBLCCEXCEPTIONS INNER JOIN dbo.TBLCCINFORMATIONOCTOBER04 ON ITPSG.TBLCCEXCEPTIONS.AWID = dbo.TBLCCINFORMATIONOCTOBER04.AWID AND ITPSG.TBLCCEXCEPTIONS.InMonth = dbo.TBLCCINFORMATIONOCTOBER04.COLMONTH INNER JOIN dbo.TBLMONTHVALUE ON dbo.TBLCCINFORMATIONOCTOBER04.COLMONTH = dbo.TBLMONTHVALUE.monthname WHERE (LEFT(dbo.TBLCCINFORMATIONOCTOBER04.CostCtr, 4) = '1038') AND (ITPSG.TBLCCEXCEPTIONS.InYear = '2004') AND (ITPSG.TBLCCEXCEPTIONS.InMonth = 'OCTOBER') ORDER BY Reason

It returns these 16 records, 10 from the 1st table and 6 from the second. If I just remove the UNION operator and run them seperatly I get 11 from the 1st table and 6 from the second.

The record I am losing is the second of these two, but with the fields I am selecting they appear identical:
R,JosephField Operations Director INULL267.00001510382004octoberTRADITIONAL BOOKING
R,JosephField Operations Director INULL267.00001510382004octoberTRADITIONAL BOOKING

Is there any reason why the UNION statement is making that second record vanish? Is there a way I can alter the statement so I can run the query with the UNION and not lose records?

Thanks,

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