Updating Tables In Sequence With Primary Key And Foreign Key Relations

Feb 7, 2007

Hi all,

       In my project i will have the  data in a collection of objects, I need to update series of tables with foreign key relations

       Right now my code looks like this

       foreach(object obj in Objects){

       int accountId=Account.Insert(obj.accountOpenDate,obj.accountName);//this will update the accounts table and returns account id which is a Identity column in Acccounts table

       int DebtId=Debt.Insert(accountd,obj.debtamount,obj.debtbalance); this will update the Debts table and returns DebtId

       ///series of tables like above but all the relevant data comes from obj and in the Insert Methods i am using stored procedures to Insert the data into table

       }

      The no of objects varies from 1000 to 1 milliion,, with this approach its taking more time to update all the data. Please let me know if any alternative procedure to handle this kind of scenario.

 

Thanks

Regards

Prasad.

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Oct 31, 2015

Is there anyway to get the order in which data to be import on to tables when they have primary and Foreign Key relations?

For ex:We have around 170 tables and when tries to insert data it will throw error stating table25 data should be inserted first when we insert data in table 25 it say 70 like that.

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Sep 19, 2000

Hi,

I have a doubt, can anyone please clarify me.

I have created the following table,

create table z
(
eno int,
deptno char(2),
ename varchar(5),
constraint pk_eno_deptno primary Key(eno,deptno)
)
and I tried to establish a foreign key based on the above defined table. It's giving error,

create table z_dup
(
eno int FOREIGN KEY REFERENCES z(eno),
deptno char(2)
)
go

Error:-
*****
There are no primary or candidate keys in the referenced table 'z' that match the referencing column list in the foreign key 'FK__z_dup__eno__18CE1BA6'.Could not create constraint. See previous errors.

Even I tried to create a foreign key like the following,

create table z_dup
(
eno int FOREIGN KEY REFERENCES z(eno,deptno),
deptno char(2)
)
go

Error:-
********
More than one key specified in column level FOREIGN KEY constraint, table 'z_dup'.


Can anyone please help me to create a foreign key relation with the base table.

tks in advance,
Srinivasan

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I was trying a joining example provided in my book in which customer is a table and person is another table. The query provided in the book is this... USE AdventureWorks2012;

GO
SELECT c.CustomerID, c.PersonID, p.BusinessEntityID, p.LastName
FROM Sales.Customer AS c
INNER JOIN Person.Person AS p ON c.PersonID = p.BusinessEntityID;

This is the query that I did....

SELECT
      c.CustomerID,p.FirstName,p.MiddleName,p.LastName
FROM
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ON
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ORDER BY
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Keys :-

Person Table
[PK_Person_BusinessEntityID]
[FK_Person_BusinessEntity_BusinessEntityID]

Customer Table
[PK_Customer_CustomerID]
[FK_Customer_Person_PersonID]

However,both of them gives a very different result set.But my question is why do we need to use the Customer.PersonID instead of Customer.CustomerID. Is it really important to use one primary key and one foreign,is there any specific reason why the book showed c.personId=p.BusinessEntityId.??

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Hi all,

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-- ImportCSVprojects.sql --

USE ChemDatabase

GO

CREATE TABLE Projects

(

ProjectID int,

ProjectName nvarchar(25),

LabName nvarchar(25)

);

BULK INSERT dbo.Projects

FROM 'c:myfileProjects.csv'

WITH

(

FIELDTERMINATOR = ',',

ROWTERMINATOR = ''

)

GO
=======================================
-- ImportCSVsamples.sql --

USE ChemDatabase

GO

CREATE TABLE Samples

(

SampleID int,

SampleName nvarchar(25),

Matrix nvarchar(25),

SampleType nvarchar(25),

ChemGroup nvarchar(25),

ProjectID int

);

BULK INSERT dbo.Samples

FROM 'c:myfileSamples.csv'

WITH

(

FIELDTERMINATOR = ',',

ROWTERMINATOR = ''

)

GO
=========================================
-- ImportCSVtestResult.sql --

USE ChemDatabase

GO

CREATE TABLE TestResults

(

AnalyteID int,

AnalyteName nvarchar(25),

Result decimal(9,3),

UnitForConc nvarchar(25),

SampleID int

);

BULK INSERT dbo.TestResults

FROM 'c:myfileLabTests.csv'

WITH

(

FIELDTERMINATOR = ',',

ROWTERMINATOR = ''

)

GO

========================================
The 3 csv files were successfully imported into the ChemDatabase of my SSMSE.

2 questions to ask:
(1) How can I designate the Primary and Foreign Keys to these 3 dbo Tables?
Should I do this "designate" thing after the 3 dbo Tables are done or during the "Importing" period?
(2) How can I set up the relationships among these 3 dbo Tables?

Please help and advise.

Thanks in advance,
Scott Chang

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[Schools] [Students]
---------------- -----------------
| SchoolId PK|<-. | StudentId PK|
| SchoolName | '--| SchoolId |
---------------- | StudentName |
-----------------

The foreign key above is as:

ALTER TABLE [Students] WITH CHECK ADD CONSTRAINT [FK_Students_Schools]
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Or
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May 4, 2004

Hi all,
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for example:
Table A[id]
Table B[id, idc]
Table C[id, ida]
Table D[id, ida]
Table E[id, idc]

I tried it by using information_scheme but I was unsuccesfull.

The result should be:
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C
D
B
E

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my example table:

numez numhx
111 111
111 111
0 111
111 0
111 0

and my results should be:

numez numhx
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3 4
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--
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--
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[Code] ...

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Aug 22, 2006

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here is my problem: I'm desigining a simple "Downloads" page in asp.net, and I have two tables set up. One is Downloads and the other is DownloadCategories. here is a simplified layout of the tables:

Downloads:
ID PK
Title
Description
CatID FK

DownloadCategories
ID PK
Name
Description
ParentID FK

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I have defined a relation in the datatable that mirrors that of the database, but no matter what I try, I cannot get it to show the relationship in the datatable when I fill it. am I doing something wrong? this is kind of how I have it setup:

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Feb 23, 2008



hiiii all,

plz , I need help:

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1-parent column.
2-parent table.
3-child coulmn.
4-child table.


using c# ado.

thanks.

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Example table:
numez numhx
111 111
111 111
0 111
111 0
111 0

and my results should be:
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1 2
3 4
0 5
6 0
7 0

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Apr 20, 2015

I have used Aasim Abdullah's (below link) stored procedure for dynamically generate code for deletion of child tables based on parent with certain filter condition. But I am getting a output which is not proper (Query 1). I would like to have output mentioned in Query 2.

Link:

[URL]

--[Patient] is the Parent table, [Case] is child table and [ChartInstanceCase] is grand child

--When I am deleting a grand child table, it should be linked to child table first followed by Parent

--- query 1

DELETE Top(100000) FROM [dbo].[ChartInstanceCase]
FROM [dbo].[Patient] INNER JOIN [dbo].[Case] ON [Patient].[PatientID] = [Case].[PatientID]
INNER JOIN [dbo].[ChartInstanceCase] ON [Case].[CaseID] = [ChartInstanceCase].[CaseId]
WHERE [Patient].PracticeID = '55';

--Query 2

DELETE Top(100000) [dbo].[ChartInstanceCase]
FROM [dbo].[ChartInstanceCase] INNER JOIN [dbo].[Case] ON [ChartInstanceCase].[CaseId]=[Case].[CaseID]
INNER JOIN [dbo].[Patient] ON [Patient].[PatientID] = [Case].[PatientID]
WHERE [Patient].PracticeID = '55';

how to modify the SP 'dbo.uspCascadeDelete' to get the output as Query 2.

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Nov 4, 2007

Hi everyone,

I am new to SSIS and I thought maybe someone would give me tips for solving the problem I am facing.


Overview:
I want to insert data contained in a flat file into several DB tables, which have N-M relations.

For illustration, I would explain the problem on a very simple DB:
1. The database contains the following 3 tables:
EMPLOYEE (EMP_ID, EMP_NAME)
PROJECT (PROJ_ID, PROJ_NAME)
EMP_PROJ (EMP_ID, PROJ_ID) , where EMP_ID and PROJ_ID are foreign keys referencing records in the EMPLOYEE and PROJECT tables respectively.


2. Each entry in the falt file contains the following data:
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Note: I used SQL Server Destination, because I need to import a huge amount of data and I read that this component performs better than the OLE DB Destination!


Questions:
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a. How can I do this and propagate the generated key among the different paths, which I have explained previously?
b. Can I first generate the two keys somehow then the parallel insertions into the different tables should start using the generated keys?


2. Is my solution correct in the first place? Or is there another better way for inserting data which belong to N-N relations?


Thanks in adavance,
Samar


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Apr 20, 2015

I have used Aasim Abdullah's (below link) stored procedure for dynamically generate code for deletion of child tables based on parent with certain filter condition. But I am getting a output which is not proper (Query 1). I would like to have output mentioned in Query 2.

Link: [URL]

--[Patient] is the Parent table, [Case] is child table and [ChartInstanceCase] is grand child

--When I am deleting a grand child table, it should be linked to child table first followed by Parent

--- Query 1

DELETE Top(100000) FROM [dbo].[ChartInstanceCase]
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--Query 2

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INNER JOIN
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Hi,

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[Code] ......

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Hi,
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