Conditional Join

Apr 27, 2008

Table A
Registation_key discharge_dt

1001 7/15/07
1002 6/4/07
1003 7/30/07


Table B
Registration_key ID end_dt value
1001 879 07/11/07 1
1001 888 07/15/07 2
1002 777 06/01/07 5
1002 778 06/01/07 2
1002 779 06/30/07 6
1003 234 07/31/07 3
1003 235 07/31/07 1
1003 236 08/01/07 7


I am trying to join Table A to Table B using the below log . Table A should have one unique mathincg record from Table B

option 1. Using registration_key and discharge_dt , looking for exact matching date( end_dt) in table B , if there is more than one record that matches then select lowest ID

option 2.if there is no record that matches option1 then, serch for the previous record with end_dt in table A less than end_dt table B. if there is more than one record then select lowest ID

option 3. if there is no record option 2 then search the next record that matches .. discharge_dt greater than end_Dt , if there is more than one record then select lowest Id



so basically, I am looking for an exact matching date in the same registration_key .. if the exact dt doesn't exist looking for the previous record and get the most closer dt and if there is no prvious record than look for next record,.


so the output should look like


output
Registration_key ID end_dt discharge_dt value

1001 888 07/15/07 7/15/07 2
1002 777 06/01/07 6/4/07 5
003 234 07/31/07 7/30/07 3





How can I do this conditional join ?

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Conditional Inner Join?

Jan 30, 2007

Im faced with the following design issue..
on my site there are different profiles: a city profile, a restaurant profile and a user profile.
in my DB:City profiles are stored in tbCities cityID int PK shortname nvarchar(50) forumID int FK (...)
Restaurant profiles are stored in tbRests restID int PK shortname nvarchar(50) forumID int FK (...)
User profiles are stored in tbUsers userID int PK shortname nvarchar(50) forumID int FK (...)
as you can see a single ID value (for CityID,restID or userid) might occur in multiple tables (e.g. ID 12 may exist in tbRests and in tbUsers)Each of these profile owners can start a forum on their profile.
forumID in each of the above tables is a FK to the PK in tbForums:forumID  intforumname nvarchar(50) (...)
Now imagine the following:
a site visitor searches ALL forums...say he finds the following forums:ForumID Forumname1 you opinion on politics2 is there life in space?3 who should be the next president of the USA?
a user may want to click on the forum name to go to the profile the forum belongs to.And then there's a problem, because I dont know in which table I should look for the forum ID...OR I would have to scan all tables (tbCities,tbRests and tbUsers) for that specific forumid,which is time-consuming and I dont want that!
so if a user would click on forumID 2 (is there life in space?)
I want to do a conditional inner join for the tablecontainingforumID (which may be tbCities,tbRests or tbUsers)
select tablecontainingforumID.shortname FROM tablecontainingforumID tINNER JOIN tbForums f ON t.ForumID=f.ForumIDwhere f.ForumID=2
I hope my problem is clear..any suggestions are welcome (im even willing to change my DB design if that would increase effectivity)
 

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Conditional Join

Oct 4, 2006

I have three tables ...


tblWine tblSpecialOfferWine tblSpecialOffer
ID Name ID WineID SpecialOfferID ID Name IsLive
===================== ============================ ==========================
1 Mouton Rothschild 1 1 1 1 February Offer 0
2 Lafite Rothschild 2 1 2 2 March Offer 1
3 Chateau Teyssier 3 2 1


... and the current query I am using is the following along with it's result set ...


SELECT
tblWine.ID AS WineID,
tblWine.Name AS WineName,
tblSpecialOffer.ID AS SpecialOfferID,
tblSpecialOffer.Name AS SpecialOfferName

FROM
tblWine
LEFT OUTER JOIN tblSpecialOfferWine ON tblSpecialOfferWine.WineID = tblWine.ID
LEFT OUTER JOIN tblSpecialOffer ON tblSpecialOfferWine.SpecialOfferID = tblSpecialOffer.ID

Results
WineID WineName SpecialOfferID SpecialOfferName
================================================== =========
1 Mouton Rothschild 1 February Offer
1 Mouton Rothschild 2 March Offer
2 Lafite Rothschild 1 February Offer
3 Chateau Teyssier NULL NULL


... but the result set I want is All wines and their associated specials offers but only show details of the offer if the offer is live like so ...


Results
WineID WineName SpecialOfferID SpecialOfferName
================================================== =========
1 Mouton Rothschild 2 March Offer
2 Lafite Rothschild NULL NULL
3 Chateau Teyssier NULL NULL


... I've tried putting where clauses like ...


WHERE tblSpecialOffer.IsLive = 1 OR tblSpecialOffer.IsLive IS NULL


... but then that hides the wines that were on a previously associated on a special offer but is no longer live (see Wine #2).

Any ideas on the query I should be using?

Note: The queries and data above were made off the top of my head so may contain mistakes.

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Conditional JOIN

Jul 23, 2005

Hi,I am trying to change an SP from dynamic SQL to proper SQL but I can'tfigure a way to conditionally add extra parts to the statement. Howcan I do the equivalent of the following?DECLARE @arg NVARCHAR(10)SELECT a.i, a.xFROM aTable aIF LEN(@arg)BEGININNER JOIN bTable b ON a.[id] = b.[id]ENDConditionally adding the INNER JOIN is very easy when building up a SQLstring but I can't see how to do it in pure SQL?Thanks.

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May 28, 2008

I have these two tables =>
Table a
Name CEN VID
1. AA 01 11
2. BB 01 11
3. CC 02 12


Table b
CEN VID CName
01 11 ZZZZ
NULL 12 YYY
02 PR XXX

I want to join either on CEN or VID.

1. Join with CEN but If CEN is NULL in table b than the inner join will be VID (automatically in single query)
2. Join with VID but if VID in table b = 'PR' than the inner join will switch to CEN (automatically)

How can I approch this in a single SQL query.

Help me...

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How To Write A Conditional Join?

Oct 24, 2006

I want to filter some search results using an inner join.The criteria are passed as a parameter.If the parameter has value, I want to inner join with it.  If there is a NULL value, I just want to ignore the inner join. I don't want to:1) Build a string and do an exec() - too slow and hard to maintain2) use a (@parm IS NULL) OR ('inner join') AGAIN, too slow Suggestions appreciated

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Conditional 3 Table Join?

May 6, 2014

Table 1

PropertyId

1
2
3
4
5
6

Table 2

PropertyID PropertyCode PropList ID

1 2 45
3 4 67
5 6 89

Table 3

PropertyID IType

1 3
2 3
3 11
4 11
5 3
6 3

Target Table

PropertyID PropertyCode

1 45
2 45
3 67
4 67
5 89
6 89

Step1: Join Table 1 and Table 3

Steo 2: If Table 1.PropertyId.Itype = 3 Then Join Table 1 and Table 3 on Table1.PropertyID = Table2.PropertyId

Else

Step 3: If Table 1.PropertyId.Itype = 11 Then Join Table 1 and Table 2 on Table1.PropertyID = Table2.PropListId

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Oct 10, 2007

Hello,

I want to write a query that joins data in a different table based on a column value. The table is for a "Playlist" and holds play list items. The items can be video, audio, images, etc. The playlist table looks like this:

Table_Playlist
-----------------
ID (int)
MediaType (char)
MediaId (int)

Table_Audio
-----------------
MediaId (int)

Table_Video
--------------
MediaId (int)


If the Table_Playlist.[MediaType] column value = "Audio" then I want to join to the Table_Audio table. If the value = "Video" then I need the video table.

Hope that makes sense. Thanks

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Complex Conditional Join

Apr 27, 2008

Table A
Registation_key discharge_dt

1001 7/15/07
1002 6/4/07
1003 7/30/071



Table B
REgistration_key ID end_dt value
1001 879 07/11/07 1
1001 888 07/15/07 2
1002 777 06/01/07 5
1002 778 06/01/07 2
1002 779 06/30/07 6
1003 234 07/31/07 3
1003 234 07/31/07 1
1003 235 08/01/07 7


I am trying to join Table A to Table B using the below log . Table A should have one unique mathincg record from Table B

option 1. Using registration_key and discharge_dt , looking for exact matching date( end_dt) in table B , if there is more than one record that matches then select lowest ID

option 2.if there is no record that matches option1 then, serch for the previous record with end_dt in table A less than end_dt table B. if there is more than one record then select lowest ID

option 3. if there is no record option 2 then search the next record that matches .. discharge_dt greater than end_Dt , if there is more than one record then select lowest Id



so basically, I am looking for an exact matching date in the same registration_key .. if the exact dt doesn't exist looking for the previous record and get the most closer dt and if there is no prvious record than look for next record,.


so the output should look like


Table B
Registration_key ID end_dt discharge_dt value

1001 888 07/15/07 7/15/07 2
1002 778 06/01/07 6/4/07 2

1003 234 07/31/07 8/1/07 7






How can I do this conditional join ?

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Inner Join Based On Conditional Column

Mar 5, 2014

I Have Table Called 'Sales' and 'Voucher',I Need To Show Each Customer ""Dueamount"" Details Based Upon Customer Paid in 'Voucher' Table But One thing I have Not Maintained Transaction History For Customer in 'Sales' Table Means I Have Column named "CreditAmount" in 'Sales' and Column Named "VoucherAmount" in 'Voucher' ,For every transaction I am updating Column named "CreditAmount" in 'Sales', So finally 'Dueamount' Must be calculated according to "VoucherAmount" of customer in 'Voucher' Table....

Sales Table:

BillMasterId BillDate CustomerId NetAmount CreditAmount

26 03/03/2014 101 1000 1000

My Query:
SELECT CONVERT(varchar,BillDate,103) as BillDate,isnull(NetAmount,0) as BillAmount, case when VoucherAmount != 0 then sum(VoucherAmount)else 0 end as'AmountReceived',case when CreditAmount !=0 then CreditAmount else 0 end as 'DueAmount' from Voucher INNER join Sales on CustomerId=CustomerID and BillMasterID=BillMasterID WHERE CONVERT(varchar,BillDate,103)='03/03/2014' AND CustomerId=101

My Output:

BillDate BillAmount AmountReceived DueAmount

03/03/2014 1000 0 0
03/03/2014 1000 500 0
03/03/2014 1000 300 0
03/03/2014 1000 200 0

Exact Output:

BillDate BillAmount AmountReceived DueAmount

03/03/2014 1000 0 1000
03/03/2014 1000 500 500
03/03/2014 1000 300 200
03/03/2014 1000 200 0

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Aug 16, 2015

I need to add a join in my select query depending upon a variable @LoggedUser. the Join is to be there if @loggedUser is 1 else i do not need it. Currently I am using two different queries one with join and one without it under If (@LoggedUser check).

the join is like -
JOIN (SELECT CAST(CONVERT(VARCHAR(8),Analyst_Effective_date , 1) AS DATETIME) Analyst_Effective_date
FROM Users us (NOLOCK) JOIN Primary_Analysts (NOLOCK)
ON User_Count_Id = Analyst_Id_fk
WHERE User_Count_Id in ((SELECT VALUE FROM dbo.fParseString(@Analyst, ',')) )) Ana
ON dep.Departure_Code = Ana.Primary_Analyst_Departure_Code_fk
)

Any way that the join can be added conditionally in the query so i do not have to write the whole code again for one join.

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Oct 4, 2015

I have two tables tabA (cola1, cola2, cola3) and tabB(colb1, colb2, colb3, colb4) which I need to join on all 3 columns of table A.

Of the 3 columns in tabA, few can be NULL, in that case I want to check the joining condition for the rest of the columns, so its conditional joining. Let me rephrase what I am trying to acheive - I need to check if the columns in joining condition is NULL in my 1st table (tabA), If so I need to check the joining condition for the rest of the two columns, if 2nd column is again NULL, I need to check the joining condition on the third column.

What I am trying to do is as below. Its working, but is very slow when one of the tables is huge. Can I optimize it or rewrite in a better way ?

--- First Create two tables
Create table tabA
(cola1 nvarchar(100), cola2 nvarchar(100), cola3 nvarchar(100))
Insert into tabA values (NULL,'A1','A2')
Select * from tabA
create table tabB

[Code] .....

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Jan 31, 2007



I have a merge join that does a full outer join. I then have a conditional split that will breakout by unchanged, insert and update. The update is what I am having a problem with. The conditional split for the update is a follows:

!ISNULL(HISTORICAL) && !ISNULL(TRANSFORM)

Now I believe the problem is related to spaces in the key field let me explain.

The join field is defined as [char](14) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,

There was an original mismatch between the two tables of VARCHAR(14) & Char(14) but now there both Char(14).

What's interesting is that the few records with Alpha characters correctly does the update but the records with starting numeric data all go down the insert path.

The data of the join columns look like

'308811151 ' - 5 Spaces This Data incorrectly goes to insert path

'TSTRWR02 ' 6 Space This Data correctly goes to update

The data is grouped and sorted by the Key field and the historical and transform column contain a 1 for all records.
while the Doc_nbr which is the key


I tested the join in SQL server and it works with and without the spaces.

From SSIS I also tried RTRIM in the SQL command of the source in addition to substring the first 9 with the right trim and I always received the same results.

I am guessing there is something going on with the not isnull in the conditional split but I can't figure it out if I am missing something or if this is a BUG.


Three paths of data after the merge join and the conditional split

Insert
DOC_NBR,HISTORICAL,TRANSFORM,DOC_NBR_historical
206352185 ,,1,
209900165 ,,1,


Update
DOC_NBR,HISTORICAL,TRANSFORM,DOC_NBR_historical
NEE ,1,1,NEE
New ,1,1,New


Unchanged
DOC_NBR,HISTORICAL,TRANSFORM,DOC_NBR_historical
,1,,0000521096
,1,,0000685216

Any suggestions, am I missing the obvious?

LL











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Jul 15, 2014

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I added an IF to check for the value of current item 2, prior item 2, current item 3, prior item 3, if there are values, then variable tables are created and filled with data, then are retrieved. As it is, my stored procedure returns 3 sets of data when current item 1, prior item 1, current item 2, prior item 2, current item 3, prior item 3 are passed to it, and only one if 2, and 3 are omitted.I would like to learn how can I return this as a one data set, either using a full outer join, or a union all?I am including a copy of my stored procedure as it is.

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Mar 31, 2008

Forgive the noob question, but i'm still learning SQL everyday and was wondering which of the following is faster? I'm just gonna post parts of the SELECT statement that i've made changes to:

INNER JOIN Facilities f ON e.Facility = f.FacilityID AND f.Name = @FacilityName

OR

WHERE f.Name = @FacilityName


My question is whether or not the query runs faster if i put the condition within the JOIN line as opposed to putting in the WHERE line? Both ways seems to return the same results but the time difference between methods is staggering? Putting the condition within the JOIN line makes the query run about 3 times faster?

Again, forgive my lack of understanding, but could someone agree or disagree and give me the cliff-notes version of why or why not?

Thanks!

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Mar 7, 2008



Hello everyone,

Is there a way in order to execute a subscribed report based on a certain criteria?

For example, let's say send a report to users when data exist on the report else if no data is returned by the query
executed by the report then it will not send the report to users.

My current situation here is that users tend to say that this should not happen, since no pertinent information is contained in the report, why would they receive email with blank data in it.


Any help or suggestions will be much appreciated.

Thanks,
Larry

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Apr 30, 2008

Hello

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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

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Dec 23, 2014

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Aug 10, 2007

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...
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OLEDB source 2
SELECT ...
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...
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These two tasks are followed immediately by a MERGE JOIN

All columns in source1 are ticked, all column in source2 are ticked, join key is shown above.
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result of source1 (..dcd column)
...
4-400-8000119
4-400-8000120
4-400-8000121
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4-400-8000123
4-400-8000124
...


result of source2 (..tkt num column)
...
4-400-1000118
4-400-1000119
4-400-1000120
4-400-1000121
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4-400-1000123
4-400-1000124
4-400-1000125
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Aug 9, 2013

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Jul 25, 2007

I'm using SQL Server 2005.



A piece of software I wrote starting timing out on a query that left outer joins a table to a view. Both the table and view have approximately the same number of rows (about 170000).



The table has 2 very similar columns, one is a varchar(1) and another is varchar(100). Neither are included in any index and beyond the size difference, the columns have the same properties. One of the employees here uses the varchar(1) column (called miscsearch) to tag large sets of rows to perform some action on. In this case, he had set 9000 rows miscsearch value to "g". The query then should join the table and view for all rows where miscsearch is set to g in the table. This query takes at least 20 minutes to run (I stopped it at this point).

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If I force the join type to a hash join, the query completes using miscsearch in about 30 seconds.



So, this works:

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and this works:

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But this does't:

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What should I be looking for here to understand why this is happening?



Thanks,

john















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INSERT #RIF_TEMP1 (rf1_row_no,rf1_rif, rf1_key_id_no, rf1_last_date, rf1_start_date)
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FROM #RIF_TEMP0 currow , #RIF_TEMP0 prevrow

[Code] ....

and below is explict join query

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SELECT currow.rf0_row_no, currow.rf0_rif, currow.rf0_key_id_no, prevrow.rf0_start_date, currow.rf0_start_date
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ON (currow.rf0_row_no = prevrow.rf0_row_no + 1)

[Code] ....

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from Contact
right join Account
on Contact.[Account Name] = Account.[Account Name]
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Hi guys,

I'll appreciate any help with the following problem:

I need to retrieve data from 3 tables. 2 master tables and 1 transaction table.

1. Master table TBLOC contain 2 records :
rcd 1. S01
rcd 2. S02

2. Master table TBCODE contain 5 records:

rcd 1. C1
rcd 2. C2
rcd 3. C3
rcd 4. C4
rcd 5. C5

3. Transaction table TBITEM contain 4 records which link to 2 master table:
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rcd 2. S01, C4, TOY
rcd 3. S01, C5, KEY
rcd 4. S02, C2, CAR



I use Left Join & Right Join to retrieve result below (using non-ASNI method) but it doesn't work.

Right Join method:


SELECT C.LOC, B.CODE, A.ITEM FROM TBITEM A RIGHT JOIN TBCODE B ON A.CODE = B.CODE

RIGHT JOIN TBLOC C ON A.LOC = C.LOC

GROUP BY C.LOC, B.CODE, A.ITEM ORDER BY C.LOC, B.CODE



When I use Non-ASNI method it work:



SELECT C.LOC, B.CODE, A.ITEM FROM TBITEM A, TBCODE B, TBLOC C

WHERE A.CODE =* B.CODE AND A.LOC =* C.LOC

GROUP BY C.LOC, B.CODE, A.ITEM ORDER BY C.LOC, B.CODE

Result:

LOC CODE ITEM
-----------------------------
S01 C1 NULL
S01 C2 NULL
S01 C3 CAR
S01 C4 TOY
S01 C5 KEY
S02 C1 NULL
S02 C2 CAR
S02 C3 NULL
S02 C4 NULL
S02 C5 NULL


Please Help.

Thanks.






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Code:

SELECT TOP 100 PERCENT dbo.tblPurchaseRaw.Year, dbo.tblPurchaseRaw.Make, dbo.tblPurchaseRaw.Model, dbo.tblPurchaseRaw.ModelType,
dbo.tblPurchaseRaw.Color, dbo.tblvZipCodes.ZIPCode, dbo.tblvZipCodes.City, dbo.tblvZipCodes.County, dbo.tblvZipCodes.State,
dbo.tblvZipCodes.AreaCode, dbo.tblvZipCodes.Region, dbo.tblaAccounts.Name, dbo.tblaAccounts.PhoneOne, dbo.tblaAccounts.AccountID,
dbo.tblPurchaseRaw.AcceptedID, dbo.tblPurchaseRaw.Series, dbo.tblPurchaseRaw.BodyStyle, dbo.tblaAccounts.WebSite,
dbo.tblaAccounts.SalesEmail, dbo.tblPurchaseRaw.EmailTo, dbo.tblPurchaseRaw.PhotoURL, dbo.tblPurchaseRaw.Mileage,
dbo.tblPurchaseRaw.RawID, dbo.tblvRegions.Name AS RegionName, dbo.tblPurchaseRaw.VIN, dbo.tblPurchaseRaw.Style,
dbo.tblPurchaseRaw.StockDate
FROM dbo.tblPurchaseRaw INNER JOIN
dbo.tblaAccounts ON dbo.tblPurchaseRaw.AccountID = dbo.tblaAccounts.AccountID INNER JOIN
dbo.tblvZipCodes ON dbo.tblPurchaseRaw.ZipCode = dbo.tblvZipCodes.ZIPCode INNER JOIN
dbo.tblvRegions ON dbo.tblvZipCodes.Region = dbo.tblvRegions.RegionID
WHERE (CONVERT(char, dbo.tblPurchaseRaw.StockDate, 101) <> '01/01/1900') AND (dbo.tblPurchaseRaw.SoldRawID IS NULL) AND
(dbo.tblPurchaseRaw.AcceptedID <> - 10) AND (dbo.tblPurchaseRaw.AcceptedID <> - 1)
ORDER BY dbo.tblvZipCodes.ZIPCode

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