Unique Key In 4 Tables
Jun 18, 2008
Hi!
I'm not sure how to resolve this problem:
I've got 4 tables:
- Table1 (UniqueCode, Col11, .. , Col1N)
- Table2 (UniqueCode, Col21, .. , Col2M)
- Table3 (UniqueCode, Col31, .. , Col3X)
- Table4 (UniqueCode, Col41, .. , Col4X)
Each TableX has the same column: UniqueCode and its column's value can't be duplicated in the tables.
Ex.
Insert Table1 Values ('Code1', 'Ex1', ... )
Insert Table2 Values ('Code1', 'Ex2', ... ) -> Error!
1) Should I control this programming a Trigger?
2) Would be better to do a new Table?
TableUnique( UniqueCode, IdTable1, IdTable2, IdTable3, IdTable4)
.. for example??
Thanks!!!
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May 5, 2007
Is it possible to create a unique constraint on two tables?In mssql2000?
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Jul 20, 2005
Hi,I have two tables such that in each table I need to make sure thatcolumn x in table A and column y in table B have a unique valuesmeaning that a user cannot insert a value to column A if its alreadyexist in column B and vice versa.How can I enforce it? Please remember that this two different tables.Thanks,Ori.
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Oct 12, 2006
I feel sure that this is a very naive question, but it is freeky me out that I can solve it. With SQL server what is the easiest way to make a field other than the Primary key unique?Would appreciate help with this. ThanksPaul
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May 15, 2008
hi guys,
i have 3 tables (T1, T2, T3), each with the same structure:
ID1 -> char(10)
ID2 -> char(12) NULL
ID3 -> char(10)
Value1 -> money
Value2 -> money
Value3 -> money
Note1 -> Text
Note2 -> Text
ID1+ID2+ID3 is the clusterd unique key in each table
what i want:
ID1, ID2, ID3 (with distinct occurencies of all 3 tables), T1.Value2, T2.Value2, T2.Value3, T3.Value1, T3.Note1
what i tried is to get all possible rows with
SELECT ID1,ID2,ID3 FROM T1
UNION
SELECT ID1,ID2,ID3 FROM T2
UNION
SELECT ID1,ID2,ID3 FROM T3
but i dont know how to join or add the other columns. maybe with
WITH RowList (ID1,ID2,ID3) AS ( ... code above.... ) SELECT ...
any ideas?
thx
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Oct 31, 2007
Hello,
I am working with a database that among other things uses multipart keys as the unique indexes which are not consistent from say one table where a parent record resides to another table which contains related child records. For example I am working with two tables right now, one that contains content that I'll call Contents and the other which contains Usage information about the contents (number of view, a rating and comments give by a customer) which I'll call ContentsUsage. The system that manages the data for the tables has a versioning system by which, whn a content item is added (first time) a "unique" id (guid) and a version number of 1 is created along with the rest of data items in the Contents table and likewise in the ContentsUsage table (essentially a one to one mapping) on the like named fields in that table. Now, each time a given record in the Contents table is updated a new version, with the same guid is created in the Contents and ContentsUsage table. So one side I have:ContentGUID > AAAAVersion > 1ContentGUID > AAAAVersion > 2And the other table (ContentsUsage)ContentGUID > AAAAVersion > 1ContentGUID > AAAAVersion > 2
While both of these tables have a quasi-unique record (row_id) of type char and stored as a guid neither obviously are the same in the two tables and having reviewed the database columns for these tables I find that the official unique key's for these tables are different (table 1, Contents combines the ContentGUID and Version) as the composite / mutli-key index, while table ContentsUsage uses the RowGUID as it's unique index.
Contents RowGUID (unique key)ContentGUIDVersionViewsRatingComments................RowGUID ContentGUID (unique key)Version (unique key)Description.....
Bearing this in mind I am unable of course to link directly the two tables by using the just the ContentGUID and have to combine the additional Version to I believe obtain the actual "unique" record in question. The question is in terms of writing queries, what would the most efficient query be? What would be the best way to join the two in a query? And are there any pitfalls with the current design that you can see with the way this database (or specifically these tables are defined)? It's something I inherited, so fire away at will on the critique. Having my druthers I would have designed these tables using a unique key of type int that was autogenerated by the database.
Any advice, thoughts or comments would be helpful.
Thanks,P.
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May 8, 2008
What query gives me the list of child tables accessing a unique key (But Not PK) for a given table?
For. E.g. In the folloiwng scenario I should get o/p as t3
create table t1 (id1 int primary key , id2 int unique )
create table t2 (id1 int references t1(id1))
create table t3 (id2 int references t1(id2))
------------------------
I think, therefore I am - Rene Descartes
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Oct 11, 2007
I have a procedure which updates a sequence number in a table such as the one below.
Seq Sequence_Id
------ ------------------
NextNum 1
This is the procedure ...
create procedure DBO.MIG_SYS_NEXTVAL(@sequence varchar(10), @sequence_id int)
as
begin
update mig_sys_sequences
set
@sequence_id = sequence_id = sequence_id + 1
where
seq = 'CSN'
return(@sequence_id)
end
The purpose of this is to generate a sequential number each time the procedure is called. This number would then be used in a number of different tables to allocate a unique id so that the id is unique across the different tables.
1). What is the most efficient way of allocating these unique ids? The tables that I plan to update will already be populated with data.
2). How would I call the above procedure from an UPDATE statement?
Many thanks,
Fred
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Jul 30, 2007
Hi
I am trying to insert values into a table that doesn't exist there yet from another table, my problem is that because it is joined to the other table it keeps on selecting more values that i don't want.
Code Snippet
SET NOCOUNT ON
INSERT INTO _MemberProfileLookupValues (MemberID, OptionID, ValueID)
SELECT M.MemberID, '6', CASE M.MaritalStatusID WHEN 1 THEN '7'
WHEN 2 THEN '8'
WHEN 3 THEN '9'
WHEN 4 THEN '10'
END
FROM Members M
INNER JOIN _MemberProfileLookupValues ML
ON M.MemberID = ML.MemberID
WHERE M.Active = 1
AND OptionID <> 6
When i execute that code it returns all the values, let say OptionID = 3 is smoking already exists in the MemberProfileLookupValues table then it is going to select that persons memberID
I want to insert only members values that aren't already in the _MemberProfileLookupValues from the Members table (I think that it is because of the join statement that is in my code, but i don't know how i am going to select members that aren't in the table, because i have a few other queries that are very similar that are inserting different values, so ultimately
ONLY INSERT THE MemberID the values 6 and the statusID of X if it is not in the table already.
Any ideas / help will be greatly appreciated. Please help.
Kind Regards
Carel Greaves
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Mar 14, 2006
SSIS 2005
Ok, I have a task in SSIS that does the following and works:
1) Brings in a txt file
2) Using a conditional component, checks for a value in the row.
3) Based on the value, splits the row into one of 3 tables (Header, Maintenance, or Payment)
Here is a print screen of what I have so far which splits Header rows into it's own table, Maintenance rows into its own table, and Payment Rows into its own table:
http://www.webfound.net/qst_how_to_add_header_PK_and_FKs.JPG
Here is a print screen of the conditional split:
http://www.webfound.net/conditional_split.jpg
Please take a look at the txt file here before it's processed:
http://www.webfound.net/split.txt
http://www.webfound.net/rows.jpg
Notice that the pattern is a header row, followed by it's corresponding detail rows. The detail rows are either Maintenance or Payment rows.
I need to somehow during the Script component or some other way, to assign a unique HeaderID (PK) to each of the header rows and add that ID to it's corresponding Maintenance and Payment detail rows in their corresponding tables as a PK. The problem is
1) I don't know how to do this in the flow of the components as I have it now
2) How do I tell it to create a new Header ID and Header FKs for the detail rows based off of each new Header row?
In the end (much later on in my entire package), the goal is to be able to run a stored proc to join and select the Header and Details rows back into a final table so I can then do more processing such as split each header and detail rows into their own txt files, etc....I don't need to go into details why but just know that this is the goal, therefore I need to relate each header row with their corresponding detail rows that are split off into a MaintenanceRow and PaymentRowTable
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Jul 20, 2005
I have two tables in my database called CartItems and OrderItems. Istore all of a session's shopping cart items in the CartItems tableusing the sessionID as the identifier (called cartID in my DB). Afteran order is placed and is approved, I would like to copy all of theitems in the CartItems table for that given cartID to the OrderItemstable given a new orderID.I will know the cartID and orderID ahead of time and would like tosend them both into a stored procedure and have the transfer takeplace.Example:take this data...CartItems (table)--------------------------------------cartID | itemID | quantity | price--------------------------------------12345 2 1 12.9512345 7 2 17.95and make it this data...OrderItems (table)--------------------------------------orderID | itemID | quantity | price--------------------------------------00001 2 1 12.9500001 7 2 17.95via some stored procedure that I send (@cartID,@orderID)Any help would be greatly appreciated!!
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Jul 5, 2015
This index is not unique
ix_report_history_creative_id
Msg 2601, Level 14, State 1, Procedure DFP_report_load, Line 161
Cannot insert duplicate key row in object 'dbo.DFP_Reports_History' with unique index 'ix_report_history_creative_id'.
The duplicate key value is (40736326382, 1, 2015-07-03, 67618862, 355324).
Msg 3621, Level 0, State 0, Procedure DFP_report_load, Line 161
The statement has been terminated.
Exception in Task: Cannot insert duplicate key row in object 'dbo.DFP_Reports_History' with unique index 'ix_report_history_creative_id'. The duplicate key value is (40736326382, 1, 2015-07-03, 67618862, 355324).
The statement has been terminated.
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Sep 22, 2004
A UNIQUE INDEX must inherently impose a unique constraint and a UNIQUE CONSTRAINT is most likely implemented via a UNIQUE INDEX. So what is the difference? When you create in Enterprise Manager you must select one or the other.
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Jul 20, 2005
HelloWhat should I use for better perfomance sinceunique constraint always use index ?ThanksKamil
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Jun 24, 2006
What's the difference in the effect of the followings:
CREATE UNIQUE NONCLUSTERED INDEX
and
ALTER TABLE dbo.titles ADD CONSTRAINT
titleind UNIQUE NONCLUSTERED
I found there're two settings in Indexs/Keys dialog box of the management studio, Is Unique, and Type. The DDL statements above are generated by setting Is Unique to yes plus Type to Index, and just Type to Unique Key, respectively. What's the difference between them?
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Mar 7, 2001
Hi everyone,
I need urgent help to resolve this issue...
As far as the performance goes which one is better..
Unique Index(col1, col2) OR Unique constraint(col1, col2) ?
Unique constraint automatically adds a unique index
and unique index takes care of uniqueness then whats the use of unique constraint ?
Which one do one use ?
thanks
sonali
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Jan 20, 2006
BOL says a unique constraint is preferred over a unique index. It also states that a unique constraint creates a unique index. What then is the difference between the two, and why is a constraint preferred over the index?
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Mar 26, 2008
hi team,
.Can i create umique constraint with out unique index.when i am creating a unique constraint sql creates a unique index (default) can i have only unique constraint ?
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Mar 12, 2008
I am having a problem trying to figure out the best way to get the results I need. I have a table of part numbers that is joined with a table of notes. The table of notes is specific to the part number and user. A row in the notes table is only created if the user has entered notes on that part number. I need to create a search that grabs all matches on a keyword and returns the records. The problem is that it currently returns a row from the parts table with no notes and a separate row with the notes included if they had created an entry. It seems like this should be easy but it eludes me today.
Here is the code
Code Snippet
create procedure SearchPartKeyword
(
@Keyword varchar(250) = null,
@Universal_Id varchar(10) = null
)
as
select p.PartNumber, p.Description, p.ServiceOrderable, n.MyNotes, p.LargestAssembly, p.DMM,
p.Legacy, p.Folder, p.Printer
from Parts p inner join notes n on p.PartNumber = n.Identifier
where n.Universal_ID = @Universal_ID and p.Description like @Keyword
union
select p.PartNumber, p.Description, p.ServiceOrderable, '' as MyNotes, p.LargestAssembly,
p.DMM, p.Legacy, p.Folder, p.Printer
from Parts p
where p.Description like @Keyword
and the results:
PartNo Description SO Notes LA DMM Legacy Folder Printer
de90008 MAIN BOARD 1 DGF1 114688 0 0 0
de90008 MAIN BOARD 1 I love this part Really I do DGF1 114688 0 0 0
This could return multiple part numbers and If they have entered notes I want the row with the notes
Thank You
Dominic Mancl
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Nov 13, 2007
What 's difference between Unique key and unique index in SQL server 2005?
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May 1, 2008
Here is the table I created:
create table Test (
[recId] [int] identity(1, 1) not null,
[code] [varchar](50) not null,
[prime] [bit] not null constraint [DF_Test_prime] default (cast(0 as bit)),
constraint [PK_Test] primary key clustered
(
[recId]
) with fillfactor = 90 on [primary]
) on [primary]
go
insert into Test (code, prime) values ('AVA', cast(1 as bit))
insert into Test (code, prime) values ('BUS', cast(1 as bit))
insert into Test (code, prime) values ('BUS', cast(0 as bit))
insert into Test (code, prime) values ('BUS', cast(0 as bit))
insert into Test (code, prime) values ('CAR', cast(1 as bit))
insert into Test (code, prime) values ('CAR', cast(0 as bit))
insert into Test (code, prime) values ('RLW', cast(1 as bit))
insert into Test (code, prime) values ('RLW', cast(0 as bit))
insert into Test (code, prime) values ('RLW', cast(0 as bit))
select *
from Test
I need to create a constraint on this table that will not allow me to have two rows that are prime for the same code. So the following insert statement should fail:
-- This should fail
insert into Test (code, prime) values ('RLW', cast(1 as bit))
Thanks for you help!
Regards,
Anand
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Jan 24, 2008
I'm new to my company, although not new to SQL 2005 and I found something interesting. I don't have an ERD yet, and so I was asking a co-worker what table some data was in, they told me a table that is NOT in SQL Server 2005's list of tables, views or synonyms.
I thought that was strange, and so I searched over and over again and still I couldn't find it. Then I did a select statement the table that Access thinks exists and SQL Server does not show and to my shock, the select statement pulled in data!
So how did this happen? How can I find the object in SSMS folder listing of tables/views or whatever and what am I overlooking?
Thanks,
Keith
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Dec 7, 2006
We have 20 -30 normalized tables in our dartabase . Also we have 4tables where we store the calculated data fron those normalised tables.The Reason we have these 4 denormalised tables is when we try to dothe calcultion on the fly, our site becomes very slow. So We haveprecalculated and stored it in 4 tables.The Process we use to do the precalcultion, will get do thecalculation and and store it in a temp table. It will compare the thetemp with denormalised tables and insert new rows , delte the old oneans update if any changes.This process take about 20 mins - 60mins. Ittakes long time because in this process we first do the calculationregardless of changes and then do a compare to see what are changed andremove if any rows are deleted, and insert new rowsand update thechanges.Now we like to capture the rows/columns changed in the normalisedtables and do only those chages to the denormalised table , which weare hoping will reduce the processing time by atleast 50%WE have upgraded to SQL SERVER 2005.So We like to use the newtechnology for this process.I have to design the a model to capture the changes and updated onlythose changes.I have the list of normalised tables and te columns which will affectthe end results.I thought of using Triggers or OUTPUT clause to capture the changes.Please help me with the any ideas how to design the new process
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Apr 5, 2007
in sql server 2000
i know how to make primary key using enterprise manager
i want to make one of the columns foreign key,how to do that using enterprise manager.and what is the difference between both.
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Jan 19, 2001
I have one table called agents.
In this table there are two columns, one called "company number" (NUMBER) and one called "company name" (VARCHAR). I have an index called agents_PK that are unique and indexes both columns with company number as first and company name as second in the column order.
But when I look at the data in the column company number its not unique, I find several rows with the same number.
How come ?
Regards Mattias
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Nov 3, 2005
How do I write a select statement that finds items in a table that are not unique between two fields using the following?
Select A.KEY, AP.[EXPIREDATE]
From ACTKEY A Left Outer Join ACTKEY_PRODUCT AP
On A.KEY = AP.KEY
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May 13, 2004
I've always used the identity field in SQL server to maintain the unique id for a table. With the new DB design at work we brought in a dba and she made us move away from allowing SQL maintain the unique field and having us maintain the unique field in code. To do that we had to begin a transaction, do a select max(id) + 1, insert into table, commit transaction. Doing it this way, I'm starting to see deadlocks due to the transactions locking the table.
Getting down to what I wanted to know, what is the pro's/con's you guys see in maintaining the unique ID this way and is there a better way of creating an unique id in T-SQL code?
Thanks
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May 14, 2008
I know that primary key is a unique key .I read somewhere that a table can have both primary key and unique key at a time .Am I Right?Pl give clarification as asap.
Thank U
vedavathi zend
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Jan 31, 2007
I am using the sql function unique id ( create a new default call it newid and then give it the value newid() ) The problem is I'm trying to automatically populate that uniqueid field with the random 36 bit character. if I create a new record it will create the 36bit character, but how do I add the 36bit character to an existing table?
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Jun 1, 2007
Dear experts,
if i've created one unique key on one column, will it creates an index on that? if so, is there any way to find how every index was created?
i mean wether it was created with create index or it was created while the primary key or unique key creation.
thank you very much....i've been using the PBGUY query
Select * from
(select object_name(si.id) [Object],index_col(object_name(si.id), si.indid, sk.keyno) [Column_Name],
case when (si.status & 16)<> 0 then 'clustered'
else 'nonclustered' end [Index Type]
from sysindexes si join sysindexkeys sk
on si.id = sk.id and si.indid = sk.indid and si.indid between 1 and 254 and (si.status & 64)=0 ) as b
where Column_Name is not null
thank you very much
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Mar 29, 2008
Hi guys,
I need your help!
May I know what can I do to get a single name using the sample table below?
toptable
name account
a 1
a 2
a 3
b 1
b 2
c 2
d 3
e 1
e 2
result will be
toptable
name account
a 1
b 2
c 2
d 3
e 2
I just want to get all single names
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Jul 24, 2007
Hello SQL gurus, can you help me with a problem.
I have an Access Database and a table containing a list of currency values.
I want to query this table to find out if there are any unique values, that is, an amount that only appears once in the table. Its probably very simple but I cannot work it out. The table is called Bids and the Field that I want to query is called Bids_value.
Any ideas would be greatly appreciated.
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Jul 24, 2007
Lorsque tu as edité un nouveau projet, tu a sans doute du prendre le même nom qu'un précédent. Lors du déploiement, l'ID du model ne peux pas être actualisé, alors il veux creer un nouveaux sur le server de rapport. Or, c'est impossible puisqu'il existe déja...
Suprime le rapport qui porte le meme identifiant et re déploie le, ca fonctionnera sans souci, j'éspère
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