MS SQL Server :: Query Optimizer Problems With Many LEFT/RIGHT OUTER JOINs

OUTER LEFT JOINs On SQL CE

Feb 17, 2008

Hi,

First of all, is this an appropriate place to get answers related to SQL CE? If not, do you have any recomended forums elsewhere?

I'm trying to get a list of various related tables using ResultSets on SQLCE 3. The query is something like this:

SELECT A.*
, F.Descricao AS FamiliasDescricao
, M.Descricao AS MarcasDescricao
, I.Descricao AS IVADescricao
FROM Artigos AS A
LEFT OUTER JOIN Familias AS F ON A.FamiliasUID = F.UID
LEFT OUTER JOIN Marcas AS M ON A.MarcasUID = M.UID
LEFT OUTER JOIN IVA AS I ON A.IVAUID = I.UID
INNER JOIN ArtigosTipos AS AT ON A.ArtigosTiposUID = AT.UID;

The column ArtigosTiposUID cannot be NULL, so an INNER JOIN is used, but the other UID columns can have a NULL value, and I need all the rows on Artigos to show up even if these other UIDs are NULL. The query runs fine like this in VS2005, returning NULL values for the columns if there are no rows on the other tables, both on the SQL Server 2005 database and the .sdf database used on the Windows Mobile device. But on Windows Mobile SQL CE gives me an "Unspecified error [7]", Native error 25607, an the stack trace ends with:

em System.Data.SqlServerCe.SqlCeCommand.ProcessResult s()
em System.Data.SqlServerCe.SqlCeCommand.CompileQueryP lan()
em System.Data.SqlServerCe.SqlCeCommand.ExecuteComman d()
em System.Data.SqlServerCe.SqlCeCommand.ExecuteResult Set()

If I replace all the LEFT OUTER JOINs with INNER JOINs only the rows where all UIDs have a value show up, but as I said, I want all rows on tabela Artigos. Even if I remove all JOINs except the last one and replace it with a LEFT OUTER JOIN I get the same erro, all rows having the column ArtigosTiposUID defined... it seems as if the simple presence of LEFT OUTER JOIN makes SQL CE return an error.

Is there a way to run the queries on VS using the SQL CE engine so that one can check whether the query will run successfuly on Windows Mobile?

Any other sugestions?

Thank you,
Hugo Lopes

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Right/left Outer Joins && Performance

Nov 13, 2003

Other than being much less readable, is there a downside to combining left and right outer joins in the same SELECT? I'm reviewing some generally poor code done by a contractor and it's peppered with queries with both left and right joins. I've always thought it was just a semantic difference, but I was just wondering if, other than readability, there were any performance issues.

Thanks,
Pete

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How Do You Do Multiple Left Outer Joins???

May 31, 2006

I need to do multiple left outer join to return search profiles that could contain NULL in them that could also be foreign keys. I bolded the three IDs that could be NULL or have a foreign key for a value. An example with my code would be great I've tried decyphering the many employee and company examples on the web but I haven't figured it out yet. Right now I only get profiles that have foreign key values and it misses the rest in the search.   So NULL MakeID or ModelID no result on that item my SQL statement below. Using SQL Server 2005. Pretty new this to SQL and databases but so far this has been the only trying part.

Thanks

String dbsql = "SELECT a.EquipmentID " +
                         "     , a.SerialNo " +
                         "     , b.Category " +
                         "     , c.Subcategory " +
                         "     , d.Make " +
                         "     , e.Model " +
                         "     , f.Status " +
                         " FROM tblEquipInfo a " +
                         "     , tblEquipCat b " +
                         "     , tblEquipSubcat c " +
                         "     , tblEquipMake d " +
                         "     , tblEquipModel e " +
                         "     , tblStatus f " +
                         " WHERE b.Category = '" + val + "' " +
                         "   AND a.CategoryID = b.CategoryID " +
                         "   AND a.SubcategoryID = c.SubcategoryID " +
                         "   AND a.MakeID = d.MakeID " +
                         "   AND a.ModelID = e.ModelID " +
                         "   AND a.StatusID = f.StatusID";

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Speed Up 6 Consecutive Left Outer Joins

Apr 28, 2008

Hi,

The following query should return a list of clr_id's that have a match in at least 1 of the other fields mentioned in the joins.

declare @keyWord varchar(40)
set @keyWord = 'merc'
set NOCOUNT on

SELECT distinct clr.clr_id
FROM CLR
LEFT OUTER JOIN CO ON CLR.CO_ID = CO.CO_ID
LEFT OUTER JOIN CLR_NM ON CLR.CLR_ID = CLR_NM.CLR_ID
LEFT OUTER JOIN CLR_USE_YR ON CLR.CLR_ID = CLR_USE_YR.CLR_ID
LEFT OUTER JOIN MODL ON CLR_USE_YR.MODL_ID = MODL.MODL_ID
LEFT OUTER JOIN PAINT_CD ON CLR.CLR_ID = PAINT_CD.CLR_ID
WHERE co.long_nm like '%'+@keyWord+'%'
OR clr_nm.clr_nm like '%'+@keyWord+'%'
OR clr_use_yr.yr_num like '%'+@keyWord+'%'
OR paint_cd.paint_cd like '%'+@keyWord+'%'
OR modl.modl_nm like '%'+@keyWord+'%'

The query runs at 3secs.
Could I improve the query somehow?
I was thinking that, since I actually need a distinct set of clr_id's, I should somehow check only the clr_id's that don't have a match in any of the previous joins.

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Transact SQL :: Difference Between Inner Join And Left Outer Join In Multi-table Joins?

Oct 8, 2015

I was writing a query using both left outer join and inner join. And the query was ....

SELECT
        S.companyname AS supplier, S.country,P.productid, P.productname, P.unitprice,C.categoryname
FROM
        Production.Suppliers AS S LEFT OUTER JOIN
       (Production.Products AS P
         INNER JOIN Production.Categories AS C

[code]....

However ,the result that i got was correct.But when i did the same query using the left outer join in both the cases

i.e..

SELECT
        S.companyname AS supplier, S.country,P.productid, P.productname, P.unitprice,C.categoryname
FROM
        Production.Suppliers AS S LEFT OUTER JOIN
(Production.Products AS P
LEFT OUTER JOIN Production.Categories AS C
ON C.categoryid = P.categoryid)
ON
S.supplierid = P.supplierid
WHERE
S.country = N'Japan';

The result i got was same,i.e

supplier   country   productid   productname   unitprice   categorynameSupplier QOVFD   Japan   9   Product AOZBW   97.00   Meat/PoultrySupplier QOVFD   Japan   10   Product YHXGE   31.00   SeafoodSupplier QOVFD   Japan   74   Product BKAZJ   10.00   ProduceSupplier QWUSF   Japan   13   Product POXFU   6.00   SeafoodSupplier QWUSF   Japan   14   Product PWCJB   23.25   ProduceSupplier QWUSF   Japan   15   Product KSZOI   15.50   CondimentsSupplier XYZ   Japan   NULL   NULL   NULL   NULLSupplier XYZ   Japan   NULL   NULL   NULL   NULL

and this time also i got the same result.My question is that is there any specific reason to use inner join when join the third table and not the left outer join.

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Two Outer-joins In One Query

Oct 5, 2003

I wrote a SQL query that firstly do an outer-join for two table and after I add another
table with outer-join as well.
I'm getting the following message:
Server: Msg 301, Level 16, State 1, Line 1
Query contains an outer-join request that is not permitted.
May be someone knows what is it?
If I remove the second join- it work....

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Left Outer Join Query?

Sep 12, 2006

Hello all,

I am stuck in a bit of a mess, and i really don't know how to get out of it.

I am a dot.net developer, working with MS SQL server 2000.

I am trying to write a query which essentially gives the amount of stock available for a particular stock_code.

select Stock_code, description from stock

Now what i want to do is, for each one of the stock_code that apears in the table above i want to look into another table called pop_item, and get the closest delivery_date for that particular stock_code. So i have top 1 and order it by delivery_date desc.

Individually for a particular stock_code, i can do this no problem. And here is my code for stock_code='E0016/6'

select top 1
stock_code, delivery_date, order_number,qty_order-qty_delivered as onorder
from pop_item
where
stock_code='E0016/6' and
qty_order>qty_delivered
order by delivery_date desc

But I can't seem to be able to do this for all the stock_code, and not a specific one, cause even though i try and left outer join it, i can't access the outer stock_code from the first query into the next...

i.e

select stock.Stock_code, description, tempp.stock_code, tempp.delivery_date, tempp.onorder from stock

left outer join

(select top 1
stock_code, delivery_date, order_number,qty_order-qty_delivered as onorder
from pop_item
where

--Can't say this(stock_code= stock.stock_code and )
qty_order>qty_delivered
order by delivery_date desc) as tempp

on tempp.stock_code=stock.stock_code

Now my question is, is there anyway to access stock.stock_code within the second query? Casue the whole query on top returns only one value for delivery_date, only of the highest delivery date in the whole of pop_item. which make sense... but i don;t know how to get around this...

OOOOOOOOOOOOOOOOOOhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!

Hope someone can help me.

Regards,

Munira

ps- should i be using a cursor, can i call cursors from asp.net. every where i read about cursors they adivice us not to use them.

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Multiple Left Joins (2 Left Joins 1 Big Headache)

Sep 1, 2005

Hi All,

Im having a problem with a statement i cannot seem to get 2 left joins working at the same time 1 works fine but when i try the second join i get this error:-

Microsoft OLE DB Provider for ODBC Drivers error '80040e14'

[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx'.

My SQL statment is as follows :-
SELECT children_tutorial.*,schools.schoolname,regions.rname FROM children_tutorial LEFT JOIN schools ON children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx

I am using an Access database i have tried all sorts to get it working and its driving me mad!! any help would be really appreciated.

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Two Left Outer Join In A Single Query

Dec 12, 2007

How to use two left outer join in a single query?

I was trying to run the follwoing query.It is giving me error

"select woancestor.wonum,wplabor.laborcode, wplabor.quantity,wplabor.laborhrs
from wplabor,workorder left outer join woancestor on workorder.wonum=woancestor.wonum
and wplabor left outer join labtrans on wplabor.laborcode=labtrans.laborcode
where woancestor.ancestor='572099' and workorder.istask=1
and workorder.wonum=wplabor.wonum"

Error is "Server: Msg 156, Level 15, State 1, Line 3
Incorrect syntax near the keyword 'left'."

But the following query works fine

"select woancestor.wonum,wplabor.laborcode, wplabor.quantity,wplabor.laborhrs
from wplabor,workorder left outer join woancestor on workorder.wonum=woancestor.wonum
where woancestor.ancestor='572099' and workorder.istask=1
and workorder.wonum=wplabor.wonum"

please help me

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Query With A Lot Of Left Joins - Rewrite?

Sep 21, 2007

Hello,

I have a query with 11 left joins. Some hits against tables with small amounts of reference data, whereas others are not so small. Should I rewrite this in another way, as performance is a requirement on this one? Or, should I do it another way?

How would I rewrite left joins? Any examples?

Thanks.

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Multi Table Query Using Two LEFT JOINs

Jul 24, 2012

I'm trying to write a 3 table query using two LEFT JOINs. Originally, I only had one LEFT JOIN and prior to the addition of the the third table (parts) this query worked. Now it doesn't. I think it has to do with my GROUP BY.

SELECT
quote.quote_id, parts.material, machining_operations.machine, machining_operations.per_roughing, machining_operations.per_of_machining,
machining_operations.programming_time, machining_operations.setup_time, machining_operations.cycle_time, machining_operations.notes
quote.part_name, quote.revision_no, quote.quantity, quote.initial_volume, quote.final_volume, quote.material_price, machining_operations.mo_id
FROM quote
LEFT JOIN machining_operations
ON machining_operations.quote_num = quote.quote_id
LEFT JOIN parts
ON parts.package_no = quote.package_no AND parts.part_name = quote.part_name
GROUP BY quote.quote_id

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T-SQL (SS2K8) :: Converting OUTER APPLY To LEFT JOIN In A Query

Oct 10, 2014

I need to convert a OUTER APPLY hint in my query to LEFT JOIN.How it can be done?The code which is presently is this: OUTER APPLY Additional Fields. nodes('/AdditionalFields/AdditionalField') AS AF (C)

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SQL Server 2008 :: Left Joins And Query Plan Compile Times

Mar 8, 2015

We have a view with many left joins. The original creators of this view might have been lazy or sloppy, I don't know. I have rewritten the query to proper inner joins where required and also nested left joins.

So rather then the following exemplary fragment

select <many items>
from A
left join B on B.id_A = A.id
left join C on C.id_B = B.idthis now looks like
select <many items>
from A
left join (B
join C on C.id_B = B.id
) on B.id_A = A.id

Compilation time of the original view was 18s, of the new rewritten view 4s. The performance of execution is also better (not counting the compile of course). The results of the query are identical. There are about 30 left joins in the original view.

I can imagine that the optimizer has difficulty with all these left joins. But 14s is quite a big difference. I haven't looked into detail in the execution plans yet. I noticed that in both cases the Reason for Early Termination of Statement Optimization was Time Out.

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Joins On Views That Are Formed With Outer Joins

Nov 3, 2000

We find that a delete command on a table where the rows to be deleted involve an inner join between the table and a view formed with an outer join sometimes works, sometimes gives error 625.

If the delete is recoded to use the join key word instead of the = sign
then it alway gives error 4425.

625 21 0 Could not retrieve row from logical page %S_PGID by RID because the entry in the offset table (%d) for that RID (%d) is less than or equal to 0. 1033
4425 16 0 Cannot specify outer join operators in a query containing joined tables. View '%.*ls' contains outer join operators.
The delete with a correleted sub query instead of a join works.

Error 4425 text would imply that joins with view formed by outer joins should be avoided.

Any ideas on the principles involved here.

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Left Join Vs Left Outer Join Syntax Generates Different Execution Plans

Apr 16, 2008

Anyone know why using

SELECT *
FROM a LEFT OUTER JOIN b
ON a.id = b.id
instead of

SELECT *
FROM a LEFT JOIN b
ON a.id = b.id

generates a different execution plan?

My query is more complex, but when I change "LEFT OUTER JOIN" to "LEFT JOIN" I get a different execution plan, which is absolutely baffling me! Especially considering everything I know and was able to research essentially said the "OUTER" is implied in "LEFT JOIN".

Any enlightenment is very appreciated.

Thanks

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Left Outer Join-please Help!

Jan 7, 2002

Hello!
I need to write a query using left outer join and I'm having trouble with it.
I have 2 tables:customer and cust_info.
I want to pull all records from customer table and cust_info table even if there is no related data in cust_info table.
But I need one condition in this query:only records from customer table where cus_type in ("A","B","C").
I don't need all other types ("D","E").

So my query looks like this:

select customer.cus_name,customer.cus_address,customer.cu s_type,cus_info.status
from customer
left outer join cus_info ON customer.sxdat_pk = cus_info.sxdat_pk
and cus_type in ("A","B","C")
AND cus_info.cus_table = 'CUSTOMER'

The result should be like this:

cus_name cus_address cus_type status
Amoco 457 bent A new
Bingo 47 lone oak C NULL
Sears 1020 Magic dr. B exist

But my query pulls records for customers with type "D" and "E" that I'm trying to exclude from result.

Please help.
Thanks,
lena

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Left Outer Join?

Jun 17, 2008

Hi there,

I have three tables
Job
JobID
WeightIn
WeightOut

Operator
OperatorID
NameFirst
NameLast

JobOperator
JobOperatorID
JobID
OperatorID

a job can be done with 1 or more operators
I want to be able to show user both assigned and unassigned operator on the front end on a certain job so I haev only parm being passed in @jobID.

How do I got about showing all the operators but somehow differentiate ones already assigned to job

Thanks!

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Left Outer Join

Dec 4, 2006

Good evening!

Well,in relational algebra we have left outer join.
In SQL is any command for that?
How can i use left outer join?

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Left Outer Join

Jan 15, 2007

I'm relatively new to SQL and I am wondering about when to use left outer joins. When should you use left outer joins?

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Left Outer Join

Sep 4, 2007

How can user left outer join with three tables ?
it retreive all employees name if position and department
are not found

fields
--------
department_code
position_code

position_code and department_code include in employee table

SELECT e.name,e.position_code
FROM employee e LEFT OUTER JOIN position p
ON e.position_code = p.position_code

regards
Mateen

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Left Outer Join With &<&>

Sep 12, 2007

I am using following query

SELECT e.rec_id,e.EMP_ID,e.FIRST_NAME,e.PROJECT_ID,
e.DEPARTMENT_CODE, e.POSITION_CODE,e.WORKING_STATUS,
d.department_name,p.position_name, c.country_code,
c.country_name
FROM employee e LEFT OUTER JOIN position p
ON e.position_code = p.position_code LEFT OUTER JOIN department d
ON e.department_code = d.department_code left outer join country c
ON e.country_code = c.country_code

where I use
where e.working_status <>'left company'

it retreive few records, it shoud display all records except where
e.working_status <> 'left company'
i.e. left outer join is not working,

we have approx 1000 employee records, 100 employee left the company.
it should show 900 employee records
but is show few records,
how can use where clause in left outer join it show all records
except where e.working_status <> 'left company'

Thanks
Mateen

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LEFT OUTER JOIN

Oct 23, 2007

Hi All,

This is my first post to the forums. Can anyone tell me what is wrong with the following statement: -

SELECT V.VNUMBER,
V.PARAMETERID,
V.SEQUENCENUM,
V.VALUE,
V.GROUPID,
G.DESCRIPTION,
V.ENTRYDATE,
V.COMMENTS,
P.PARAMETERLABEL,
P.CATEGORY,
P.FIELDSCALE
FROM VBS_PARAMETERSP, (VBS_VOLUNTEER3 V LEFT OUTER JOIN VBS_GROUPS G)
ON V.GROUPID = G.GROUPID
AND P.PARAMETERID= V.PARAMETERID
WHERE V.PROSAMPLEID= 1

I'll appreciate a response.

Many Thanks,

I.A

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Left Outer Join

Jan 26, 2008

Hi iam new to sql forum can you send sample code for left outjoin
and right outer join

Desikankannan

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Need Help With Left Outer Join...

Sep 15, 2005

I have a SQL query I'm invoking via VB6 & ADO 2.8, that requires three"Left Outer Joins" in order to return every transaction for a specificset of criteria.Using three "Left Outer Joins" slows the system down considerably.I've tried creating a temp db, but I can't figure out how to executetwo select commands. (It throws the exception "The column prefix'tempdb' does not match with a table name or alias name used in thequery.")Looking for suggestions (and a lesson or two!) This is my first attemptat SQL.Current (working, albeit slowly) Query BelowTIASELECTLEDGER_ENTRY.entry_amount,LEDGER_TRANSACTION.credit_card_exp_date,LEDGER_ENTRY.entry_datetime,LEDGER_ENTRY.employee_id,LEDGER_ENTRY.voucher_explanation,LEDGER_ENTRY.card_reader_used_ind,STAY.room_id,GUEST.guest_lastname,GUEST.guest_firstname,STAY.arrival_time,STAY.departure_time,STAY.arrival_date,STAY.original_departure_date,STAY.no_show_status,STAY.cancellation_date,FOLIO.house_acct_id,FOLIO.group_code,LEDGER_TRANSACTION.original_receipt_idFROMmydb.dbo.LEDGER_ENTRY LEDGER_ENTRY,mydb.dbo.LEDGER_TRANSACTION LEDGER_TRANSACTION,mydb.dbo.FOLIO FOLIOLEFT OUTER JOINmydb.dbo.STAY_FOLIO STAY_FOLIOONFOLIO.folio_id = STAY_FOLIO.folio_idLEFT OUTER JOINmydb.dbo.STAY STAYONSTAY_FOLIO.stay_id = STAY.stay_idLEFT OUTER JOINmydb.dbo.GUEST GUESTONFOLIO.guest_id = GUEST.guest_idWHERELEDGER_ENTRY.trans_id = LEDGER_TRANSACTION.trans_idAND FOLIO.folio_id = LEDGER_TRANSACTION.folio_idAND LEDGER_ENTRY.payment_method='3737******6100'AND LEDGER_ENTRY.property_id='abc123'ORDER BYLEDGER_ENTRY.entry_datetime DESC

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Or In Left Outer Join.

Jul 20, 2005

What is the result of adding an or into a left outer join?For example:Selectl.list_id,l.request_idFrom List lleft outer join Request ron l.request_id = r.request_id or l.list_id = r.list_idThanks :)

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LEFT OUTER JOIN

Dec 20, 2007

Hi,

I have come across this type of a query.

SELECT T1.*, T2.*, T3.*, T4.*

FROM T1

LEFT OUTER JOIN T2 ON T1.aaa = T2.bbb

LEFT OUTER JOIN T3 ON T2.bbb = T3.ccc

LEFT OUTER JOIN T4 ON T3.ccc = T4.ddd

WHERE T1.aaa = @p1

Is this correct?

For the first join T1 is the left table. What about second and third joins? are the left tables T2 and T3 resp or T1 itself?

Thanks in advance

P

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Left Outer Join? Or Not?

Aug 7, 2007

I am trying to get a query to work and having trouble. I have two tables. I want all records in my left table plus null in the right table if no matching records exist or one record only if there are matching records. What I don't want is multiples if there is more than one match in the right table.

So if I use this:
select * from contacts left outer join sales on contacts.id = sales.contactid

I will get more than one record per contact if there is more than one sale. I only want one record per contact even if there is more than one sale.

How would I accomplish this?

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LEFT OUTER JOIN

Sep 27, 2006

Hi All,

Greetings! I have a problem converting *= to LEFT OUTER JOIN.
Here's my code that will retrieve a single record when executed:

SELECT *
FROM ar_t_memo_hdr A,
ar_r_trbal_cust_tmp B,
common..fs_currency_master E,
ar_reval_history rev

WHERE A.company_no = 'RAM'
AND A.company_locn = 'BANG'
AND E.fs_company_code = 'RAM'
AND E.fs_locn_code = 'BANG'
AND A.currency = E.fs_curr_code
AND A.memo_type = 'DM'
AND A.cust_no = B.cust_no
AND A.so_locn = B.so_locn
AND B.host_id = 100
AND A.memo_dt <= '2006-09-25 00:00:00.000'
AND A.unapplied_amt >= 0
AND
(
(CONVERT(varchar,A.reversal_dt,101) > '2006-09-25 00:00:00.000' AND A.status = 'V')
OR (a.status ='A')
)
AND A.company_no *= rev.company_no
AND A.company_locn *= rev.company_locn
AND A.cust_no *= rev.cust_no
AND B.cust_no *= rev.cust_no
AND B.so_locn *= rev.so_locn
AND A.memo_type *= rev.document_type
AND A.memo_no *= rev.document_no
AND rev.created_date = (SELECT MAX(his.created_date)
FROM ar_reval_history his
WHERE his.company_no = rev.company_no
AND his.company_locn = rev.company_locn
AND his.document_no = rev.document_no
AND his.document_type = rev.document_type
AND his.rev_dt <= DATEADD(dd,1,'2006-09-25 00:00:00.000'))

After replacing *= with LEFT OUTER JOIN, the above query returns nothing.
Could some one please help me resolve the problem??

Thank you,
Chaithanya

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LEFT OUTER JOIN

Dec 20, 2007

Hi,

I have come across this type of a query.

SELECT T1.*, T2.*, T3.*, T4.*

FROM T1

LEFT OUTER JOIN T2 ON T1.aaa = T2.bbb

LEFT OUTER JOIN T3 ON T2.bbb = T3.ccc

LEFT OUTER JOIN T4 ON T3.ccc = T4.ddd

WHERE T1.aaa = @p1

Is this correct?

For the first join T1 is the left table. What about second and third joins? are the left tables T2 and T3 resp or T1 itself?

Thanks in advance

P

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Left Outer Join

Apr 18, 2008

Need some assist - not sure I am using right join? I am using a Left Outer join -
Table A - has Cust # and Cust Name
Table B - has Cust #

If there are 2 entries with same Cust # and a slight difference in spelling of cust name, I get 2 entries. Looking to get 1 row based on cust #, regardless of spelling of name?

Thanks

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Left Outer Join

Apr 12, 2006

Hi All Dudes and Dudesses

Please help... I've got Two tables, Problem and Breach, in DB Support. The main Table (Problem) has a primary key on field Number and I retrieve most of my data from this table but the other fields are irellevant. The Breach Table includes fields: Number & Keyword. I use an Left Outer Join to connect from Problem.Number to Breach.Number and retrieve the Breach.Keyword if any. If there's no records in Breach it still retrieves all the Problem.Numbers and that's great but when there's more than one Breach.Keyword for the Problem.Number I retrieve more than one record at this stage but I would only like to retrieve one. My Query:

Select

Support_Problem.Number, Breach.Keyword

From

Support_Problem Support_Problem

Left Join Support_Breach Support_Breach ON Support_Problem.Number=Support_Breach.Number

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Outer Joins

Sep 2, 1999

I have been using an outer join to display information in a form. I would like to edit the rows that are returned. The join shows all of the rows in the 1st table, and the corresponding rows in the 2nd other. If there are no corresponding rows in the 2nd table, a NULL is displayed. The problem is when I try to edit one of the fields that is "NULL", I get an error. I know why the error is happening, because the NULL field is a row that does not exist, yet. The jet database engine will automatically insert rows into the 2nd table, but SQL server will not. I have tried to set primary key and foreign key properties for the tables in question, but it still does not work. Does anyone know how to do this?

Thanks for the help.
Davant

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