Foreign Key
Jun 23, 2007
Hi Friends,
Is there any way to get the table name which is referenced by the
foreign key
for example: consider two table "Staff" and "Department"
Staff with following columns
PK_ID
FK_DepartmentID
Name
Address
Department with following columns
PK_DepartmentID
DeptName
Actually what i need is: Initially i would be having the table name as
"Staff"
from Staff table i need to identify that the column FK_DepartmentID is
a foreign key
and the primary key is in the Department table
i need to traverse from Staff table and identify that FK_DepartmentID
is a primary key in Department table
this has to be accomplished by sql query.... probably this could be
fetched from
Data Dictionary but i couldnt find the relationship between the system
tables.
Thanks
ArunDhaJ
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Dec 27, 2003
Hello,
I want to make a poll and have to use a foreign key in my database. This is not possible in Web Matrix so I have to use SQL Enterprise Manager. But don't know how. I read the help but can't figure it out. Can someone help me??? Thanks in advance.
Regards,
Roel Alblas
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Sep 14, 1998
Hi!
Is it possible in SQL 6.5 to create a Foreign Key on a field that
has a datatype of SMALLINT? I have created FK`s with
other datatypes, but it doesn`t seem to work with this particular
datatype. Is there some trick to this?
Thank you for your assistance!
Toni
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Mar 30, 2006
When you set a foreign key to reference a primary key on another table, does the foreign key automatically update? Can anyone explain just how to make a relational table from just the nuts and bolts SQL statements.
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Dec 20, 2004
Hi there,
I'm trying to make a few tables in SQL (First time user). The tables have been derived from a logical model based around my assignment...
I'm having problem getting two foreign keys in one table in the SQL. I keep getting the duplicate foreign key error...
I'm not sure where i'm going wrong.....
http://img.photobucket.com/albums/v294/Jertsy/Agh.jpg
there’s a pic of my tables.... There are 4 tables, blog, blogger, blog_entry, and comment.. Blog is only table without a FK.
have a look & thanks for any and all help....
Spencer.
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Jun 5, 2007
I would like to create a foreign key but the Primary table has 2 fields as it Primary Key. Is there a way to create a Foreign Key that links only on one field of the primary key.
Ex: table 1: id int , language char(2), description varchar(100) PK = ID + language
table 2 : id int, idlanguage int PK = id FK (idLanguage refers to id from table 1)
This cause an error because the foreign key does not include all part of the primary key.
Rufen
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Jan 4, 2008
table1
-------
a1 number(10) PK
b1 varchar2(3)
c1 number(10)
Table2
----------
d1 number(10) PK
b1 varchar2(3)
c1 number(10)
Can I make a Foreign key from Table2(b1,c1) to table1(b1,c1) if b1 in table1 might be null.
When I tried that I got this.
ORA-02270: no matching unique or primary key for this column-list
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Apr 13, 2008
Hi everyone,
My main table has a column named "customer" which is a foreign key pointed to my secondary table consisted of a column "customer_id".
I wanted to change my secondary table's customer_id's name into another name whereby deleting it and create a new column instead (i dont know another way of changing names by code) but i'm not allowed to do that due to "customer_is"'s being attached to my main table as FK.
Any suggestion how to do it ?
Thanks a lot.
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Aug 10, 2007
i want to make primary key and foreign key relationship of table A1 and table B1 but A1 exist in database A and B1 exist in database B
column name u can pretain as C1, C2
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Aug 8, 2006
I am deleting a column from a table in code. Before I drop the colum I need to find if the column belongs to a foreign key. I have the names of the foreign keys for the table from sysobjects.How can I determine what columns are part of the foreign key?
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Oct 5, 2006
Just installed this the Forum starter Kit and am getting this message when I try to add the first threadI'm a bit of a newbie but not only damp behind the earsThe INSERT statement conflicted with the FOREIGN KEY constraint "FK_MembersForums_MemberInfo". The conflict occurred in database "SQL2005_****_*****01", table "dbo.MemberInfo", column 'memberid'.The statement has been terminated. What do I need to do to the SQL Tables in order to get this to work?
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Nov 9, 2006
Hi, i have 3 tables.
Orders: {OrderNr(PK, autonumber), date}
Order_Line: {OrderNr(FK), ItemNr(FK), number}
Items: {ItemNr(PK), Name, ...}
How do I insert a new Order with a new order_line? I get this error: The INSERT statement conflicted with the FOREIGN KEY constraint
I can't figure out how to capture the autogenerated OrderNr.
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Apr 17, 2007
Can any body tell me how to know to what columns of other table it refers to.
shiva kumar
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Apr 27, 2007
I have a one to many relationship between two tables. The master table is keyed using an int ID field set to IsIdentity yes and this is the primary key. The field name is ChurchID. Likewise the detail table has such a field as it's primary key and is named ContactID.
I carry the ChurchID field in the detail table and would like to make it the foreign key. I could not find this explained in the two books I have and the help was anything but that )perhaps it's just me afterall).
Well, any help in this matter would be greatly appreciated as I find myself at a standstill until this can be resolved.
Thanks in advance.
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Jul 3, 2007
When I try to insert a record on my DB (SQL 2005 Express) I get a constraint error. This is my table setup which has been simplified to expose the problem I have:
Categories TABLEint CatId PKvarchar CatName :
Items TABLEint ItemId PKvarchar ItemName :
X_Items_Categoriesint CatIdint ItemId
So basically I have a one-to-many relationship between Items and Categories, in other words each item is associated to one or more categories and this association is done via the X_Items_Categories cross table. On this cross table I set two constraints:
The CatId of each entry in the cross table (X_Items_Categories) must exist in the Category table, and
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Nov 30, 2007
I am new beginner for SQL .I have requirement of using foreign key in tables I have created earlier.Can anyone tell me the syntax for the same ?
Please help me, Your suggestions are welcome.
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Mar 13, 2008
I'm trying to enter data into a SqlServer 2005 database programatically. The databases are part of an open source program I have. I'm encountering the following error when I try to enter data into a particular table:The INSERT statement conflicted with the FOREIGN KEY constraint "FK_CMRC_ProductImages_CMRC_Products". The conflict occurred in database "hscom", table "dbo.CSK_Store_Product", column 'productID'. The statement has been terminated. I understand what's happening theoretically, but I don't know where to look for where the constraint is defined, or how to fix it. I don't see FK_CMRC_ProductImages_CMRC_Products as a file name or a stored procedure. Diane
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Apr 7, 2008
tell me how to add foreign keys in sql 2005 express
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Apr 26, 2004
Hi
Can anyone tell me how I can remove a foreign key in a SQL database?
Thanks in advance
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Sep 24, 2004
Hi;
I have 2 tables Users and DVDTestResults these tables have a relation over UserID
Users.UserID
DVDTestResults.UserName
both char
But when I try to insert in DVDTestResults I am having an error:
INSERT statement conflicted with COLUMN FOREIGN KEY constraint 'FK_DVDTestResults_Users'. The conflict occurred in database 'Test', table 'Users', column 'UserID'. The statement has been terminated.
can you help me why?
thank you....
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Aug 12, 2005
I'm using stored procedures to update my tables. If I disable the foreign key constraint all works perfectly. Otherwise I get this error:INSERT statement conflicted with TABLE FOREIGN KEY constraint 'FK_wansub_invoice'. The conflict occurred in database 'test1', table 'invoice'. The statement has been terminated. I don't understand why I'm getting the error, because when I disable the constraint even the foreign key fields are updated properly and there is no apparent conflict with the linked table. I've included my c# code and the stored procedure below.FYI the foreign keys in question are InvoiceDate, AccountNum, CarrierId, and Cycle. These are the primary keys in the "invoice" table, and foreign keys in the "wansub" table. It is vital that all records in the wansub table are matched with a record in the invoice table, so I have to have this constraint in place. C# code to create parameters and call the sp:
public int updateWanTable(WanSubaccount sub, Invoice invoice)
{
SqlCommand cmdUpdateWan;
int returnvalue = 0;
cmdUpdateWan = new SqlCommand("usp_updatewan", conn);
cmdUpdateWan.CommandType = CommandType.StoredProcedure;
SqlParameter invoicedate = cmdUpdateWan.Parameters.Add("@InvoiceDate", SqlDbType.SmallDateTime);
invoicedate.Value = DateTime.Parse(invoice.InvoiceDate.Trim());
SqlParameter subaccountnumber = cmdUpdateWan.Parameters.Add("@SubaccountNumber", SqlDbType.VarChar, 50);
subaccountnumber.Value = sub.SubaccountNumber.Trim();
SqlParameter addressa = cmdUpdateWan.Parameters.Add("@AddressA", SqlDbType.VarChar, 50 );
addressa.Value = sub.Address.Trim();
SqlParameter citya = cmdUpdateWan.Parameters.Add("@CityA", SqlDbType.VarChar, 50 );
citya.Value = sub.City.Trim();
SqlParameter statea = cmdUpdateWan.Parameters.Add("@StateA", SqlDbType.VarChar, 50 );
statea.Value = sub.State.Trim();
SqlParameter zipa = cmdUpdateWan.Parameters.Add("@ZipA", SqlDbType.NChar, 10 );
zipa.Value = sub.Zip.Trim();
SqlParameter countrya = cmdUpdateWan.Parameters.Add("@CountryA", SqlDbType.VarChar, 50 );
countrya.Value = sub.Country.Trim();
SqlParameter addressb = cmdUpdateWan.Parameters.Add("@AddressB", SqlDbType.VarChar, 50 );
addressb.Value = sub.AddressB.Trim();
SqlParameter cityb = cmdUpdateWan.Parameters.Add("@CityB", SqlDbType.VarChar, 50 );
cityb.Value = sub.CityB.Trim();
SqlParameter stateb = cmdUpdateWan.Parameters.Add("@StateB", SqlDbType.VarChar, 50 );
stateb.Value = sub.StateB.Trim();
SqlParameter zipb = cmdUpdateWan.Parameters.Add("@ZipB", SqlDbType.NChar, 10 );
zipb.Value = sub.ZipB.Trim();
SqlParameter countryb = cmdUpdateWan.Parameters.Add("@CountryB", SqlDbType.VarChar, 50 );
countryb.Value = sub.CountryB.Trim();
SqlParameter speed = cmdUpdateWan.Parameters.Add("@Speed", SqlDbType.VarChar, 50 );
speed.Value = sub.Speed.Trim();
SqlParameter type = cmdUpdateWan.Parameters.Add("@Type", SqlDbType.VarChar, 50 );
type.Value = sub.Type.Trim();
SqlParameter monthlycharge = cmdUpdateWan.Parameters.Add("@MonthlyCharge", SqlDbType.Money );
monthlycharge.Value = sub.MonthlyServiceFee;
SqlParameter discounts = cmdUpdateWan.Parameters.Add("@Discounts", SqlDbType.Money );
discounts.Value = sub.Discounts;
SqlParameter other = cmdUpdateWan.Parameters.Add("@Other", SqlDbType.Money );
other.Value = sub.Other;
SqlParameter ucc = cmdUpdateWan.Parameters.Add("@UCC", SqlDbType.Money );
ucc.Value = sub.Ucc;
SqlParameter fedtax = cmdUpdateWan.Parameters.Add("@FedTax", SqlDbType.Money );
fedtax.Value = sub.FedTax;
SqlParameter statetax = cmdUpdateWan.Parameters.Add("@StateTax", SqlDbType.Money );
statetax.Value = sub.StateTax;
SqlParameter othertax = cmdUpdateWan.Parameters.Add("@OtherTax", SqlDbType.Money );
othertax.Value = sub.OtherTax;
SqlParameter accountnum = cmdUpdateWan.Parameters.Add("@AccountNum", SqlDbType.VarChar, 50 );
accountnum.Value = invoice.AccountNumber.Trim();
SqlParameter carrierid = cmdUpdateWan.Parameters.Add("@CarrierId", SqlDbType.Int );
carrierid.Value = invoice.CarrierId;
SqlParameter isthirdparty = cmdUpdateWan.Parameters.Add("@IsThirdParty", SqlDbType.Bit );
isthirdparty.Value = sub.IsThirdParty;
SqlParameter thirdparty = cmdUpdateWan.Parameters.Add("@ThirdPartyBillingCompany", SqlDbType.VarChar, 50 );
thirdparty.Value = sub.ThirdPartyBillingCompany.Trim();
SqlParameter var = cmdUpdateWan.Parameters.Add("@Comments", SqlDbType.VarChar, 255 );
var.Value = sub.Comments.Trim();
SqlParameter notes = cmdUpdateWan.Parameters.Add("@Notes", SqlDbType.VarChar, 255 );
notes.Value = sub.Notes.Trim();
SqlParameter cycle = cmdUpdateWan.Parameters.Add("@Cycle", SqlDbType.Int );
cycle.Value = invoice.Cycle;
// try
// {
conn.Open();
// }
// catch{
//
// }
// try{
returnvalue = cmdUpdateWan.ExecuteNonQuery();
// }
// catch(SqlException e){
// returnvalue = 2;
// }
// finally{
conn.Close();
fill(this);
// }
return returnvalue;
}The SP:CREATE PROCEDURE usp_updatewan( @InvoiceDate smalldatetime, @SubaccountNumber varchar(50), @AddressA varchar(50), @CityA varchar(50), @StateA varchar(50), @ZipA nchar(10), @CountryA varchar(50), @AddressB varchar(50), @CityB varchar(50), @StateB varchar(50), @ZipB nchar(10), @CountryB varchar(50), @Speed varchar(50), @Type varchar(50), @MonthlyCharge money, @Discounts money, @Other money, @UCC money, @FedTax money, @StateTax money, @OtherTax money, @AccountNum varchar(50), @CarrierId int, @IsThirdParty bit, @ThirdPartyBillingCompany varchar(50), @Comments varchar(255), @Notes varchar(255), @Cycle int)
AS
if exists ( select * from wansub where InvoiceDate = @InvoiceDate and SubaccountNumber = @SubaccountNumber and AccountNum = @AccountNum and CarrierId = @CarrierId and Cycle = @Cycle ) Begin --if the record exists update wansub set AddressA = @AddressA, CityA = @CityA, StateA = @StateA, ZipA = @ZipA, CountryA = @CountryA, AddressB = @AddressB, CityB = @CityB, StateB = @StateB, ZipB = @ZipB, CountryB = @CountryB, Speed = @Speed, Type = @Type, MonthlyCharge = @MonthlyCharge, Discounts = @Discounts, Other = @Other, UCC = @UCC, FedTax = @FedTax, StateTax = @StateTax, OtherTax = @OtherTax, IsThirdParty = @IsThirdParty, ThirdPartyBillingCompany = @ThirdPartyBillingCompany, Comments = @Comments, Notes = @Notes EndElse Begin
insert into wansub values (@InvoiceDate, @SubaccountNumber, @AddressA, @CityA, @StateA, @ZipA, @CountryA, @AddressB, @CityB, @StateB, @ZipB, @CountryB, @Speed, @Type, @MonthlyCharge, @Discounts, @Other, @UCC, @FedTax, @StateTax, @OtherTax, @AccountNum, @CarrierId, @IsThirdParty, @ThirdPartyBillingCompany, @Comments, @Notes, @Cycle)
EndGOAny help is greatly appreciated! Especially since I have other tables with this very problem as well . . .
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Feb 20, 2006
Hi
I have a one to many relationship between two MS SQL tables.
When inserting a record in the master table (primary key is autoinc) how can I get this value for setting in the foreign key details table?
TIA
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Mar 20, 2006
i have 3 table which is merchant, merchantcategory and merchantitem.
merchantcategory's foreign key is refer to merchant_id, and merchantitem's foreign key is refer to merchantcategory_id......
the problem is like this....
i would like to select all the available items from merchantitem, but i only have the information of merchant_id, so what method should i use to get these output ??
i am using the functions which generated by codesmith with wilson ORMapper method.....
i really hope that someone will provide me the solution......thanks
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May 17, 2001
Hello Folks,
Well I've hit the wall on this one:
I'm wondering if one can designate a conditional foreign key that relates to one of many different tables depending on the "type" column in the foreign key's. My goal is to come up with some SQL code that will allow for this in a Create table statement. (By the way I'm using MS SQL-7 but I'm wondering if this can be done in general.)
I have two simple cases below that show illustrate what I'm trying to do:
Thanks in advance, -JerryZZ
---------------------------------------------------------
Case 1: The foreign key relation is to a primary key
Table: Invoices
-Fields:
---InvoiceID ..... (primary key)
---BilleeID ...... (fkey to Manfacturers.ManfID IF BilleeType=M)
...................(fkey to Distibutors.DistID IF BilleeType=D)
---BilleeType .....(constraint = M or D)
Table: Manufacturers
-Fields:
---ManfID ........ (primary key)
---CompanyName.. (not null)
Table: Distributors
-Fields:
---DistID ........ (primary key)
---CompanyName .. (not null)
---------------------------------------------------------
Case 2: The foreign key relation is to a unique "not null" non-primary key
Table: InvoicesEmail
-Fields:
---InvoiceID ..... (primary key)
---EmailAddress .. (fkey to Manfacturers.EmailAddress IF BilleeType=M)
...................(fkey to Distibutors.EmailAddress IF BilleeType=D)
---BilleeType .....(constraint = M or D)
Table: Manufacturers
-Fields:
---ManfID ........ (primary key)
---EmailAddress .. (unique, not null)
Table: Distributors
-Fields:
---DistID ........ (primary key)
---EmailAddress .. (unique, not null)
---------------End-O-Message-------------------------------------
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Sep 5, 2001
Hi All,
For some reason I have to drop a foreign key in the table and recreate them again. for example, I droped titleauthor table's foreign key in the PUBS database, then I want to recreate them again, but I got error massage. I used below script:
alter table titleauthor
drop CONSTRAINT FK__titleauth__au_id__164452B1
====
alter table titleauthor
add constraint FK__titleauth__au_id__164452B1 foreign key (au_id) references authors(au_id)
**************error message*************
Server: Msg 547, Level 16, State 1, Line 1
ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK__titleauth__au_id__164452B1'. The conflict occurred in database 'pubs', table 'authors', column 'au_id'.
******************************************
Anybody can please tell me where is wrong?
Thank you so much!!!
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Aug 11, 1999
student --- enrollment is 1- to - many . ssn is pk in student. ssn and courseid is pk in enrollment. later I added the foreign key constraint FK_SSN in enrollment table reference student table. it is ok.
enrollment --- lessonhistory is 1-to -many, ssn, courseid and lessonid is pk in lessonhistory . I tried to set FK_SSN foreign key constraint in lessonhistory table reference enrollment table, it always show error message " no primary key in referewnce talbe enrollment "
I don't know how to fix it. could you help me out, thanks!!
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Aug 24, 1999
Could someone enlighten me as to the advantage of using the foreign key tab when in table design mode in the Enterprise Manager. Does it have any advantages ?? Is it necessary ??
thanks in advance
Paul
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Mar 29, 2001
I haven't tried, but does anyone know if its possible to a have a foreign key for two tables when the tables reside in different databases (on the same server)?
Thanks,
Doug Smith
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Sep 5, 2001
Hi All,
For some reason I have to drop a foreign key in the table and recreate them again. for example, I droped titleauthor table's foreign key in the PUBS database, then I want to recreate them again, but I got error massage. I used below script:
alter table titleauthor
drop CONSTRAINT FK__titleauth__au_id__164452B1
====
alter table titleauthor
add constraint FK__titleauth__au_id__164452B1 foreign key (au_id) references authors(au_id)
**************error message*************
Server: Msg 547, Level 16, State 1, Line 1
ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK__titleauth__au_id__164452B1'. The conflict occurred in database 'pubs', table 'authors', column 'au_id'.
******************************************
Anybody can please tell me where is wrong?
Thank you so much!!!
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Oct 25, 2001
l'm trying to do inserts on tables with foreign keys and they keep crashing. Can somebody please help.Whats the best way of populating data that has foreign keys?
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Apr 10, 2008
Hi
Does anyone have a solution to my problem? I'm having a problem with the below sp. I'm getting the following error when I run it. -The INSERT statement conflicted with the FOREIGN KEY constraint
Code:
ALTER procedure [dbo].[sp_tmptimesheet_insert_day]
(@weektotal int,
@workedon datetime,
@hoursworked numeric(10, 2),
@UserNM int,
@hoursworkedtue numeric(10, 2),
@hoursworkedwed numeric(10, 2),
@hoursworkedthurs numeric(10, 2),
@hoursworkedfri numeric(10, 2),
@hoursworkedsat numeric(10, 2),
@hoursworkedsun numeric(10, 2),
@createduserid int,
@issued Nvarchar(1),
@readyforbilling Nvarchar(1),
@performancevalueid int,
@rate Nvarchar)
as
begin
insert INTO tmptimesheets
( PlacementID
, Periodstarting
, createdon
, createduserid
,issued
,readyforbilling
,rate)
SELECT placementid
, @workedon
, getdate()
,@createduserid
,@issued
,@readyforbilling
,@rate
FROM sql03.pronet_ts.dbo.placements
WHERE applicantid = @userNM
AND enddate > dateadd(week,-2,getdate()) and @weektotal > '0' and @weektotal is not null
select SCOPE_IDENTITY()
end
begin
-----Monday-----
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
@workedon,
@hoursworked,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworked > '0' and @workedon = t.periodstarting
-----Tuesday------
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,1,@workedon),
@hoursworkedtue,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedtue > '0'
and dateadd(day,1,@workedon) = dateadd(day,1,t.periodstarting)
----Wednesday------
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,2,@workedon),
@hoursworkedwed,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedwed > '0'
and dateadd(day,2,@workedon) = dateadd(day,2,t.periodstarting)
--------Thurs-----
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,3,@workedon),
@hoursworkedthurs,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedthurs > '0'
and dateadd(day,3,@workedon) = dateadd(day,3,t.periodstarting)
-------Friday------
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,4,@workedon),
@hoursworkedfri,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedfri > '0'
and dateadd(day,4,@workedon) = dateadd(day,4,t.periodstarting)
---------sat--------
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,5,@workedon),
@hoursworkedsat,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedsat >'0'and dateadd(day,5,@workedon) = dateadd(day,5,t.periodstarting)
--------sunday-------
Insert into tmptimesheethours
(timesheetid,
applicantid,
workedon,
hoursworked,
performancevalueid,
breaks)
select SCOPE_IDENTITY(),
@userNM,
dateadd(day,6,@workedon),
@hoursworkedsun,
@performancevalueid,
'0'
FROM sql03.pronet_ts.dbo.placements p, sql03.pronet_ts.dbo.tmptimesheets t
WHERE p.placementid = t.placementid and p.applicantid = @userNM
AND t.createdon < getdate() and t.createdon > dateadd(day,-1,getdate())
and @hoursworkedsun > '0'
and dateadd(day,6,@workedon) = dateadd(day,6,t.periodstarting)
end
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Jul 20, 2004
Hi y'all!
I have a table (Portfolio) with the following columns:
1)PortfolioID
2)StockID
3)Date
Interestingly enough, I also have a second table (stock) with the following columns:
1) StockID
2) Date
The relationship I am trying to enforce is one in which the Portfolio table is made up of many stocks, and the Stock table rows can be components of many Portfolios. Many-To-Many in that respect (OMG! Am I enforcing an orgy-type relationship? ;) )
My Portfolio PK is all three columns. My Stock PK is both columns. Obviously both tables contain other data, but that isn't necessary to figure stuff out here, I don't think.
My portfolio table defines portfolios that consist of multiple stocks. However, the Stock table will never have a duplicate stockID on any given date. The reasoning here is that a stock's data (the "other stuff" in the stock table) won't change from portfolio to portfolio, since the smallest unit is a stock, and that stock's performance data for a given date will be the same regardless of how many portfolios it may be a part of.
On the other hand, a portfolio MAY consist of multiple instances of the SAME or different stocks.
Many-To-Many
Attempting to add a FK constraint where the primary key table is STOCK, and the FK table is PORTFOLIO was my way of attempting to enforce at the DB level that there is only ONE of a given stock (defined as a distinct StockID and Date pair) for each day, but it can be associated with one-to-many PORTFOLIOs. The FK is StockID and Date.
It all seemed so simple... :( but of course, since I create my portfolio before the STOCK rows associated with it (stock rows are only created as needed, based on the portfolio rows that define the stock list that makes up the portfolio), the FK constraint fails (no primary key row exists when the FK row is created).
It bothers me to remove the constraint, even though I know I must...
How would one go about enforcing this type of relationship? What I really want is the constraint to reverse the PK and FK tables...but the STOCK table's columns are a subset of the PORTFOLIO table's primary key...so I can't do it that way (error due to PORTFOLIO's columns not being THE PK or having a unique constraint (which they cannot have, since the same StockID/Date can exist in more than one PORTFOLIO.
Any thoughts from anyone able to stay awake and interested by this time?
Thankspaul
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Oct 4, 2004
How would I drop a foreign Key?
Thanks
Lystra
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