Dupes From A Join :(

Dec 9, 2001

I have 3 tables, and im doing a join like:
select top 10 thits.fhits as hits, tmain.fheadline as rubrik, tmain.fpubfile as pub
from thits
join tmain on tmain.postid=tHits.postid
join tkeyscat on tkeyscat.postid=tmain.postid
where tkeyscat.fkeycat=60 order by hits desc

Which works great (almost).

The problem is when an article in tmain is cathegorized in more then
one cathegory, so the join tkeyscat on tkeyscat.postid=tmain.postid
might join in more then one result.

Im trying to select the 10 most read articles from tmain/thits where the article is in keycat 60.

How can I solve this?

tia
/frax

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Dupes In My Db

Feb 5, 2000

Greetings!

I have a database with several million records, I have found dupes and I need to get rid of them while keeping the original data in the db, kind of like delete all but 1. Any ideas of an easy way to do this?


Thanks,
Jimmy Ipock, MCSE, MCP+I

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Urgent - Dupes..

Apr 6, 2001

Hi ,

i need to delete duplicate rows in a table, i want a good logic and example to solve this issue. Please help me in this..

urs
vj

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Help Eliminate Dupes

Nov 30, 2006

I am VERY new to SQL and I am having a heck of a time biulding a script to find and remove duplicate entries.

Here is the table structure.


CREATE TABLE [dbo].[SecurityEvents](
[EventLog] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[RecordNumber] [int] NULL,
[TimeGenerated] [datetime] NULL,
[TimeWritten] [datetime] NULL,
[EventID] [int] NULL,
[EventType] [int] NULL,
[EventTypeName] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[EventCategory] [int] NULL,
[EventCategoryName] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[SourceName] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Strings] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[ComputerName] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[SID] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Message] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Data] [varchar](255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
) ON [PRIMARY]

GO

This small script seems to eliminate the dupes, but I can't seem to figure out to properly replce the table the with output of the script with all the dupes gone.


select distinct * from dbo.SecurityEventsTest where recordnumber IN
(select recordnumber from dbo.SecurityEvents)
order by recordnumber

Could someone help??

Thank You,

John Fuhrman
http://www.titangs.com

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Feb 7, 2005

I need to delete all rows that match at least one of the account_id values of another row *and* that has the same email address. However, if they have the same email address and none of the account_id values then I need to keep it. I've attached a sample dataset along with the expected results.

I have this:
DELETE [acctID_emailAddress_tmp] FROM [acctID_emailAddress_tmp]
JOIN
(select emailaddress, account_id, max(contact_id_tmp) max_cid
from [acctID_emailAddress_tmp]
group by emailaddress, account_id) AS tempImportTable
ON tempImportTable.[emailaddress] = [acctID_emailAddress_tmp].[emailaddress]
WHERE [acctID_emailAddress_tmp].[contact_id_tmp] < tempImportTable.[max_cid]
AND tempImportTable.[account_id] = [acctID_emailAddress_tmp].[account_id];

but it doesn't work since it's keeping the subset of the dupe row(s).

Can someone shed some light?

TIA

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Oct 13, 2005

Being fairly new to SQL and SQL scripting, I am at a loss on how to proceed on my issue.

I have a MSDE database with 2 tables that need to modified. I am changing to a standard 12 digit code in my PATIENTS table for the field sChartCode nvarchar). That code will be in the form of 110012345678. 1100 will preceed the actual 8 digit chartcode

In the PATIENTS table, the same person may be duplicated many times using vaiations such as 123456, 12345678, 012345678, 12345678 SMITH, 012345678 SMITH. For each of these records, they are linked to the RECORDS db using the field lPatientId (int).

I have already manually updated about 20K records in the RECORDS db which
takes way to many hours of time. New records will be imported at about 10K a week or so and will be over 100K soon. By the way, the SQL server is on the way.

What I am looking for is an easier way to find the records that have not been
converted in the PATIENTS db and see if they match one that has already been converted. If it has, it would need to update all records in the RECORDS db with the correct updated lPatientId and then delete the duplicate record(s) from the PATENTS db. If not, it would only need to add '1100...' to the lPatientId field.

Any help or guidance that anybody can give will be most appreciated.

Dale

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Apr 30, 2008

Hello

Can any one tell me the difference between Cross Join, inner join and outer join in laymans language

by just taking examples of two tables such as Customers and Customer Addresses


Thank You

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May 22, 2015

I have two xml source and i need only left restricted data.

how can i perform left restricted join?

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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

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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Dec 23, 2014

I have two select statements, in between select statement taking UNION ALL . I need to avoid the error

Warning: The join order has been enforced because a local join hint is used.

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Aug 10, 2007

Scenario:

OLEDB source 1
SELECT ...
,[MANUAL DCD ID] <-- this column set to sort order = 1
...
FROM [dbo].[XLSDCI] ORDER BY [MANUAL DCD ID] ASC


OLEDB source 2
SELECT ...
,[Bo Tkt Num] <-- this column set to sort order = 1
...
FROM ....[dbo].[FFFenics] ORDER BY [Bo Tkt Num] ASC

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.
join type is left outer join (source 1 -> source 2)

result of source1 (..dcd column)
...
4-400-8000119
4-400-8000120
4-400-8000121
4-400-8000122 <--row not joining
4-400-8000123
4-400-8000124
...


result of source2 (..tkt num column)
...
4-400-1000118
4-400-1000119
4-400-1000120
4-400-1000121
4-400-1000122 <--row not joining
4-400-1000123
4-400-1000124
4-400-1000125
...

All other rows are joining as expected.
Why is it failing for this one row?

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Apr 14, 2015

I'm having trouble with a multi-table JOIN statement with more than one JOIN statement.

For each order, I need to return the following: CarsID, CarModelName, MakeID, OrderDate, ProductName, Total ordered the Car Category.

The carid (primary key) and carmodelname belong to the Cars table.
The makeid and orderdate belong to the OrderDetails table.
The productname and carcategory belong to the Product table.

The number of rows returned should be the same as the number of rows in OrderDetails.

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Aug 9, 2013

Why would I use a left join instead of a inner join when the columns entered within the SELECT command determine what is displayed from the query results?

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Jun 5, 2006

I have a merge join (full outer join) task in a data flow. The left input comes from a flat file source and then a script transformation which does some custom grouping. The right input comes from an oledb source. The script transformation output is asynchronous (SynchronousInputID=0). The left input has many more rows (200,000+) than the right input (2,500). I run it from VS 2005 by right-click/execute on the data flow task. The merge join remains yellow and the task never finishes. I do see a row count above the flat file destination that reaches a certain number and seems to get stuck there. When I test with a smaller file on the left it works OK. Any suggestions?

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Why Does My Query Timeout Unless Force Join To Hash Join?

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).

If I remove the "where" clause and join all rows in the two tables, the query completes in about 20 seconds. If set the varchar(100) column (called descrip) to "g" for the same rows set via miscsearch, the query completes in about 20 seconds.



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



So, this works:

SELECT di.File_No, prevPlacements, balance,'NOT PLACED' as status FROM Info di LEFT OUTER HASH JOIN View_PP pp ON di.ram_file_no = pp.file_no WHERE miscsearch = 'g' ORDER BY balance DESC



and this works:

SELECT di.File_No, prevPlacements, balance,'NOT PLACED' as status FROM Info di LEFT OUTER JOIN View_PP pp ON di.ram_file_no = pp.file_no WHERE descrip = 'g' ORDER BY balance DESC



But this does't:

SELECT di.File_No, prevPlacements, balance,'NOT PLACED' as status FROM Info di LEFT OUTER JOIN View_PP pp ON di.ram_file_no = pp.file_no WHERE miscsearch = 'g' ORDER BY balance DESC



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



Thanks,

john















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Page 2 - Within The INNER JOIN, How To Limit The Row To 1 Row Inside The INNER JOIN?

Apr 24, 2007

Awesome! I don't alway get the email notification of whoever reply to the posting. I think it only work after I log off of the forum.

Scott

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Dec 24, 2013

We are trying to migrate from sql 2005 to 2012. I am changing one of the implicit join to explicit join. As soon as I change the join, the number of rows returned are fewer than before.

Below is my Implict join query

INSERT #RIF_TEMP1 (rf1_row_no,rf1_rif, rf1_key_id_no, rf1_last_date, rf1_start_date)
SELECT currow.rf0_row_no, currow.rf0_rif, currow.rf0_key_id_no, prevrow.rf0_start_date, currow.rf0_start_date
FROM #RIF_TEMP0 currow , #RIF_TEMP0 prevrow

[Code] ....

and below is explict join query

INSERT #RIF_TEMP1 (rf1_row_no,rf1_rif, rf1_key_id_no, rf1_last_date, rf1_start_date)
SELECT currow.rf0_row_no, currow.rf0_rif, currow.rf0_key_id_no, prevrow.rf0_start_date, currow.rf0_start_date
FROM #RIF_TEMP0 currow LEFT JOIN #RIF_TEMP0 prevrow
ON (currow.rf0_row_no = prevrow.rf0_row_no + 1)

[Code] ....

the count returned from both the queries is different.

I am not sure what am I doing wrong. The count of #RIF_TEMP0 is always 32, it never changes, but the variable @countTemp is different for both the queries.

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Feb 5, 2015

Why does this right join return the same results as using a left (or even a full join)?There are 470 records in Account, and there are 1611 records in Contact. But any join returns 793 records.

select Contact.firstname, Contact.lastname, Account.[Account Name]
from Contact
right join Account
on Contact.[Account Name] = Account.[Account Name]
where Contact.[Account Name] = Account.[Account Name]

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How To Join 3 Tables Using Left Or Right Join Keyword?

Aug 17, 2007

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:
rcd 1. S01, C1, CAR

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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Nov 7, 2006

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This is the simple sql (no join on the tables):

select 1.code, 2.rowdetail
from tblcodes 1, tblelements 2

But how to do this in SSIS?

Thanks - Ken

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May 6, 2008

I read that merge joins work a lot faster than hash joins. How would you convert a hash join into a merge join? (Referring to output on Execution Plan diagrams.)
THANKS

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Apr 17, 2007

There is a table called "tblvZipCodes" that contain a zipcode of all cities, area code that are located in that zip code.

The problem I have with the inner join is that there are more than 1 cities in one zipcode code. Is there a way to just return only the 1st row and not return the rest of the rows from the tblvZipCodes in the INNER JOIN query?

Thanks..


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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Mar 1, 2008

hello, i am running mysql server 5 and i have sql syntax like this:
select
sales.customerid as cid,
name,
count(saleid)
from
sales
inner join
customers
on
customers.customerid=sales.customerid
group by
sales.customerid
order by
sales.customerid;
it works fine and speedy. but when i change inner join to right join, in order to get all customers even there is no sale, my server locks up. note: there is about 10000 customers and 15000 sales.
what can be the problem?
thanks,

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Jan 2, 2006

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May 20, 2006

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Jun 28, 2007

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Oct 10, 2007

Given a table of building components e.g. floors, walls, etc, etc:

create table component_multiplier_table
(

system_code char(4),
system_component_code char(3),
function_code char(4),
component_multiplier dec(7,6)
)

Where function_code is the function of the area e.g. Auditorium, Classrom, etc, etc. And not all components are available for all functions e.g. Carpeting is available for Classrooms but not Power Plants or Warehouses.

I need to self join the above table to itself on system_code and system_component_code and find out which rows are missing from each side.

A query that I've been banging away at with no success is:

SELECT c1.*, c2.*
FROM [dbo].[component_multiplier_table] c1 FULL OUTER JOIN [dbo].[component_multiplier_table] c2
ON (c1.system_component_code = c2.system_component_code) AND (c1.[system_code] = c2.[system_code])
WHERE c1.function_code = '2120' AND c2.[function_code] = '2750' AND (c1.[system_code] IS NULL OR c2.system_code IS NULL);

I added the is null conditions, no joy. I've tried every flavor of outer join w/o success.

Could any T-SQL gurus out there help me figure out how to do this in a set before I start coding

DECLARE crsr CURSOR

Thanks.

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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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Apr 26, 2002

Take the following scenario:

We have two tables that have somewhat of a parent-child relationship. We are trying to use a SQL-92 outer join that returns the same results as a TSQL *= outer join. The difficulty we are having is that some of the parent records do not have any corresponding child records, but we still want to see those parent records with 0 (zero) for the count. How can we accomplish this with a SQL-92 compliant join (if it is even possible)? In the query results below, we would like the first set of results.

Thanks in advance for any help.
-David Edelman

Test script below, followed by results
===========================================
create table parent (p_id int NOT NULL)
go
create table child (p_id int NOT NULL, c_type varchar(6) NULL)
go
insert parent values (1)
insert parent values (2)
insert parent values (3)
insert parent values (4)
insert parent values (5)
insert parent values (6)
insert parent values (7)
insert parent values (8)
insert parent values (9)
insert parent values (10)
go

insert child values (1, 'AAA')
insert child values (1, 'BBB')
insert child values (1, 'CCC')
insert child values (2, 'AAA')
insert child values (4, 'AAA')
insert child values (4, 'DEF')
insert child values (4, 'AAA')
insert child values (4, 'BBB')
insert child values (5, 'AAA')
insert child values (5, 'AAA')
insert child values (6, 'AAA')
insert child values (7, 'AAA')
insert child values (7, 'BBB')
insert child values (7, 'CCC')
insert child values (7, 'DDD')
insert child values (10, 'AAA')
insert child values (10, 'CCC')
go

select p.p_id, count(c.p_id) as num_rows
from parent p, child c
where p.p_id *= c.p_id
and c.c_type in ('AAA', 'BBB')
group by p.p_id

select p.p_id, count(c.p_id) as num_rows
from parent p left outer join child c on p.p_id = c.p_id
where c.c_type in ('AAA', 'BBB')
group by p.p_id

=========================================
Results:
(T-SQL *= outer join)
p_id num_rows
----------- -----------
1 2
2 1
3 0
4 3
5 2
6 1
7 2
8 0
9 0
10 1

(SQL-92 outer join)
Warning: Null value eliminated from aggregate.
p_id num_rows
----------- -----------
1 2
2 1
4 3
5 2
6 1
7 2
10 1

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Hello,

Could someone please explain the following sel statement to me please:

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join useroffice UO on UO.USER_ID = UD.PK
join officedata OD on OD.pk = UO.OFFICE_ID
left join usertitle1 UT on UT.PK = UD.fk_user_title1

WHERE UD.PK = 451
ORDER BY UD.pk

I understand that the joins are just brining data that is related the a particular filed but why the LEFT JOIN???

Thanks

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Nov 2, 2007

Hello,

I have this table called "Playlist_Items". It has different "media types" in it. An MP3 is "1", a video is "2", etc.

I want to make a query that gets all the items in the playlist and gets common properties between them, like the name, user, etc.

The only problem is that the tables aren't normalized, so I have to do something like, if the "MediaType" is 1 then look in the MP3 table and get this column, otherwise if its 2 then look in the video table. Etc.

I have no idea how to do this in SQL... :/

Here is a diagram of my tables:




Thanks very much!

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Jun 25, 2007

Hi,



This is a sample database table

TableA

============================

aID int identity(1,1) primary key

aName varchar(30)



TableB

===========================

bID int identity(1,1) primary key

bTitle varchar(30)

aID int references TableA(aID)



TableC

===========================

cID int indentity(1,1) primary key

cCategory varchar(30)

bID int references TableB(bID)



Here I got two query, are them the same?



Select A.aName, B.bTitle, C.cCategory

From TableA A, TableB B, TableC C

Where A.aID = B.aID And B.bID = C.cID



and



Select A.aName, B.bTitle, C.cCategory

From TableA A Join TableB B On A.aID=B.aID

Join TableC On B.bID=C.cID



Are those two the same?

And what is the different of JOIN and LEFT OUTER JOIN? Any other JOIN?



Millions Thanks!

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Jul 3, 2006

Hi,I have 2 tables: tblStatements and tblLines (one to many) AnytblStatements record can have many associated records in tblLines.The search criteria is against tblLines (ie tblLines.fldDateofService


Quote:

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