Sequencing for relation table

i have a many-to-many relation with a
relation table.
the relation table has a "id" - column as primary key
and two foreign keys columns
REL_TABLE
ID | TABLE_A_ID | TABLE_B_ID
where at the toplink workbench can i define
the sequencing for the "id" - column ?
thanks

A relation table that contains any additional information, such as its own PK or qualifying fields, is not a typically mapped using a M:M. TopLink's M:M mapping assumes the relation table contains only the two FKs, which together form the PK of the table.
The simplest solution is to map another class to the relation table that has its own unique identity for each relationship and then configure sequencing on this mapped class.
Doug

Similar Messages

Creating sequences for all tables in the database at a time

Hi ,
I need to create sequences for all the tables in my database.
i can create individually ,using toad and sqlplus.
Can any one give me a code for creating the sequences dynamically at a time for all the tables.
it is urgent ..
Regards.

I need to create sequences for majority of the tables that are having ID column
which is sequences."The majority" is not the same as all. So you probably want to drive your generation script off the ALL_TAB_COLUMNS view...
where column_name = 'ID'You need to think about this carefully. You might want different CACHE sizes or different INCREMENT BY clauses for certain tables. You might even (whisper it) want a sequence to be shared by more than one table.
Code generation is a useful technique, but it is a rare application where one case fits all.
Cheers, APC
Blog : http://radiofreetooting.blogspot.com/

How to find the sequence for a table.

Hi Everyone,
I've got plenty of sequences. How can I identify that what are the sequences acting on a table?
Regards,
BS2012.

Greg.Spall wrote:
In my last job, we used the table/column comments to point to the sequence.
so:
CREATE SEQUENCE seq_test1;
CREATE TABLE my_table
(id number);
COMMENT ON TABLE my_table IS 'Test table for demonstration purposes on OTN';
COMMENT ON COLUMN my_table.id IS 'Primary Key, sequence populated: seq_test1';... or something like that :P
But yeah, outside of that, good luck if you have no documentation!Of course, ALL of the 'code search' solutions put forth are assuming the references will be found in PL/SQL packages. That ignores the potential that the code could be located somewhere else, like application code that exists OUTSIDE of the database .... Bottom line is that there is no 100% one-size-fits-all method for automating the discovery of relationships between tables and sequences.

Ctx.SaveChanges() creates new records for related tables

Ok, this is my first stab at EF Code first, so forgive me if this sounds stupid.
I have a simple database and want to add a record in the main trans table. It has 2 foreign keys to 2 reference tables. I wire up the data entry screen in WPF (MVVM) and populate the entity. This entity has the correct references to existing records in the
reference tables.
However when I call save changes it adds the trans record, but also ADDS new records to the reference tables (producing duplicates). I do not want to add records to the reference tables, but rather use the existing records.
I'm sure it's a simple thing, but I am stuck. Any help would be appreciated...
Thanks,

Thank you for the response. I probably didn't phrase it clearly...
I have a simple Warehouse attendance app that will record when people are absent and the reason. I have 2 fixed reference tables. One is a list of employees, the other is a list of reasons (s - Sick, V - Vacation, etc...)
User enters a date, then selects a employee from a drop down and a reason from a drop down.
01/08/2015      Joe Smith     S - Sick
Both the employee object and reason object (in my record class) point to valid existing records from their reference tables.(i.e employee Joe smith has an Id of 57)
When I call ctx.SaveChanges();
it adds the record to the attendance file, but also adds a record to the employee and the reason table. I now have 2
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Here is the record class:
public class Record
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One sequence for multiple lookup tables?

I am sorry if this is off-topic, however can anybody advise what is better - use one sequence for all tables (lookup tables) or to create unique sequence for each table?
Thanks
DanielD

Daniel,
After you read this (http://asktom.oracle.com/pls/ask/f?p=4950:8:::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:2985886242221,), you may be sorry you asked.
Scott

Help-how can i see the sequence in the table?

Hi, i created sequence for the table. but how can i view the sequence as a column in the table? like the sequence started with 1 and increment by 1. how can i make it available as a column in the table? thanks a lot for anyone's prompt reply. much appreciated.

eg.
Create table:
create table t1 (
id number(10),
col1 varchar(2)
Create sequence:
CREATE SEQUENCE "PEMARTEN"."T1_ID" NOCYCLE NOORDER CACHE 20 NOMAXVALUE MINVALUE 1 INCREMENT BY 1 START WITH 1
You can do 2 things:
Use the sequence in your insert query:
eg.
insert into t1 (id, col1) values (t1_id.nextval, 'example');
OR
Create a before insert trigger (prefered):
CREATE OR REPLACE TRIGGER "PEMARTEN"."BI_T1" BEFORE INSERT ON "PEMARTEN"."T1"
REFERENCING OLD AS OLD NEW AS NEW
FOR EACH ROW
DECLARE
new_id number;
BEGIN
SELECT t1_id.nextval
INTO new_id
FROM dual;
:new.id := new_id;
END;
Now you can just insert data:
insert into t1 (col1) values ('example');
sequence.nextval increments the sequence and returns the next value
sequence.currval returns the current value of a sequence
I hope that helps.
Kind regards,
Pieter

Creation of sequence and trigger for each table!!!!!!!1

Hi
I am new to trigger and Sequence field. In one of my database we have many tables with fields for specifing ID numbers. Iam planning to insert the ID field with help of a Sequence and trigger...that trigger fires by adding the sequence value from the dual table. Now the point is here we r having around *60* table with ID field. And i am planning use the above process for each table by creating sequences and trigger for each table.
Will this affects the performance of database.
Is there any other option other than the above process, I mean other than creating sequences and trigger for each table.
PLzz help to resolve this issuee......
Shiyas
Edited by: user13170361 on Jun 7, 2010 12:37 AM

Tiger, I didn't mind about your comment, but the point is try to use
select NVL(max(a) + 1,1) into i from p1_temp;This line in your trigger code and see what is happening. The problem is with your trigger. You are using group by function and you will not get no_data_found !
For more help, this is some modification of your code.
SQL> create table p1_temp (a number(10) primary key, b number(10));
Table created.
SQL> create or replace trigger trg_p1_temp
2 before insert on p1_temp for each row
3 declare
4 i number(10);
5 begin
6 begin
7 select NVL(max(a) + 1,1) into i from p1_temp;
8 exception
9 when no_data_found then
10 i := 1;
11 end;
12 :new.a := i;
13 end;
14 /
Trigger created.
SQL> insert into p1_temp(b) values (1);
1 row created.
SQL> insert into p1_temp(b) values (2);
1 row created.
SQL> commit;
Commit complete.
SQL> select * from p1_temp;
         A          B
         1          1
         2          2
SQL> Edited by: Saubhik on Jun 7, 2010 2:30 AM

Loading the different result sets in the same sequence for the target table

Dear all,
I have 5 tables say A,B,C,D as my source and i made 3 joins P,Q,R .the result sets of these 3 joins are loading into a target table X but with 3 different targets with same table name.
I created one sequence say Y as my target table has primary key and mapped to three different targets for the same target table which i need to load.
But after deployed and executed successfully ,i am able to load the data from three join result sets with differeent sequence numbers.
I am looking to load data like this.
If First Result set P has 10 Records,SEcond Result Set Q Has 20 and the third result set has 30 records then while loading data into first target it creates the seq for the 10 records from 1..10 and while loading the data for second result set ,it creates the sequence from 11 ...20 and while loading the third target with the third result set it creates the sequence from 21 ----30.
But i am looking to load the three result sets in the sequence 1to 10 but not like creating fresh sequence for each result set.
how can we achieve this in owb?
any solution for this will be appreciated.
thank you
kumar

My design is like following
SRC1
---->Join1--------------------------->Target1( Table X)<-----Seq1
SRC2
SRC3
----> Join2----------->Target2(Table X)<----Seq1
SRC4
-----> Join3 -------> Target3(Table X)<-----Seq1
SRC5
Here the three 3 targets are for the same Table X as well sequence is same i.e seq1
If the First Join has 10 rows ,Seq1 generates sequence in 1 to 10 while loading target1
But while loading second target,Same Seq1 is generating new sequence from 11 but i am looking to load target2 and target 3 starting from sequence 1 but not from 11 or so.
As per your comments :
you want to load 3 sources to one target with same sequence numbers?
yes
Are you doing match from the other two sources on first source by id provided by sequence (since this is the primary key of the table)?
No
can you please tell me how to approach for this?
Thank You
Kumar

SEQUENCE Object for Small Tables Only?

QUOTE from a recent thread: "Long term solution should be to use SEQUENCE with NO CACHE for small tables instead of identity and benefit from performance improvement for large tables."
Thread:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/cf63d145-7084-4371-bde0-eb3b917c7163/identity-big-jump-100010000-a-feature?forum=transactsql
How about using SEQUENCE objects for large tables? Thanks.
Kalman Toth Database & OLAP Architect
SQL Server 2014 Design & Programming
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

Well Erland, either you calm down your manager (with a martini?) or use NO CACHE.
QUOTE: "This could cause a sequence to run out of numbers much more quickly than an IDENTITY value. It could also cause managers to become upset that values are missing, in which case they’ll need to simply get over it and accept that
there will be numbers missing.
If you need SQL Server to use every possible value, configure a cache setting of NO CACHE. This will cause the sequence to work much like the IDENTITY property. However, it will impact the sequence performance due to the additional metadata writes."
LINK: Microsoft SQL Server: The Sequencing Solution
Kalman Toth Database & OLAP Architect
SQL Server 2014 Design & Programming
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

Need related table for some subject in the primavera contact management

Please I want to know the related table for the subject contact or contract or cost ... in the primavera application,
if someone have any idea let me know
Thanks

If you are looking for the database relationships (to assist in building forms/reports or using web services) you should look in the Oracke Knowledgbase. You should find the joins document here:
https://support.oracle.com/epmos/faces/DocumentDisplay?id=1210307.1&displayIndex=8

M:N Relation and plural name for associative Table

Hi,
I'm using DM 3.1.4
In my logical model, 2 entities and an M:N relation. I define a name for this relation
Entity Student
Entity Stage
Relation Registration
I create a glossary with plural form for these three names (entities name and relation name) :
Student --> STUDENTS
Stage --> STAGES
Registration --> REGISTRATIONS
When I generate relationnal model with "apply name translation" option, my two tables are named correctly with the plural name, but the associative table is named with the relation name (registration), not with the plural form (REGISTRATIONS)
Is this a bug ? Is there another way to automatically define plural name for an associative table ?
Thanks
Fabrice.
Edited by: FabriceC on 22 mars 2013 14:03

Hi Fabrice,
thanks for reporting the problem. I logged a bug for that.
There is no another way for setting a plural name for intersection table. If you switch to 3.3 then you can set the name manually and lock it so it cannot be changed further.
Philip

Standard Datasource for Excise related tables in R/3

Hi Experts,
    We are developing BI Reports for the Custom Reports in R/3 .
    In one of the ZReports in R/3 the data is coming from 12 tables.
    The data is coming from the tables EKBE,EKPO,EKKO,ADRC,MKPF,BKPF ,MAKT,
    J_1IPART1,J_1IPART2,J_1IEXCDTL,J_1IMOVEND,J_1IMTCHID.
    The tables J_1IPART1,J_1IPART2,J_1IEXCDTL,J_1IMOVEND,J_1IMTCHID are Excise Related.
    Please suggest me if any standard Datasource is available for these tables .
Regards,
Chakradhar

Hi,
There is no Standard DS for Excise.
I created the Generic Dss on those tables with delta enabled in my last project. And they are running successfully.
I created 2 DSs on the same table , one with delta enabled on Created date and another one with delta enabled on Changed date ( Wherever this field is there in the base table). And used Lower limit as 1 as safty delta so that I was able to do delta loads multiple times in a day.
Regards,
Anil Kumar Sharma .P

Relating a sequence to a table

hi there
i have a table "Employee" for which I have an index column emp_no (Primary Key).
i want to write a sequence for this column, such that it starts at 1 and gets incremented by 1 everytime I insert a row in "Employee"
Any help will be great.
Mahesh.

I have to disagree with you here about the use of variables. There is nothing gained by selecting the sequence value into a variable and then assigning that variable to the :new.column_name.
Offsets? Formatting? I'm not entirely sure what you mean here since the purpose of the sequence is to give you a value - not a value in a certain range. In other words, what's the point of a sequence if you're going to turn around and change the number?
Exception handler? Recording the sequence value? Not sure why an exception factors in here, but anywhere you could use the variable you should instead just use the :new.column_name value.
Naming conventions? For what?
Using the value later in the trigger? Again, just use :new.column_name. Using a variable is totally redundant.
If there is some specific case that you feel warrants a variable, I would really like to hear about it because the reasons you mentioned here just don't necessitate the use of a variable.
I'm pushing back on this because I feel pretty strongly on this issue, but this is just a friendly discussion.

Sort Sequence for mutli dimension table in SAP Lumira

Hi Experts,
I notice one interesting point in SAP Lumira for multi dimension
For example, we have a table like below
Country City   GSV
A1           B        100
               C        150
               D        130
A2           E        200
A3           F        100
               G        150
if you turn on the subtotal for GSV in Lumira table, result will be like below
Country City   GSV
A1           B        100
               C        150
               D        130
               Total   380
A2           E        200
               Total   200
A3           F        100
               G        150
               Total   250
Sort by GSV descending, result will like this
Country City   GSV
A1           C        150
               D        130
               B        100
               Total   380
A2           E        200
               Total   200
A3           G        150
               F        100
               Total   250
Here the sort sequence for City under each country is correct
But the sequence for country is incorrect and I think the correct sequence for country will be
Country City   GSV
A1           C        150
               D        130
               B        100
               Total   380
A3           G        150
                F        100
               Total   250
A3           E        200
               Total   200
It looks like this issue is not only for Lumira and other company tools behaviors same as well
Would you kindly let me know whether whether for sorting, the sort sequence should consider from 1st level to lowest level
Best regards
Alex yang

Hi,
I think you've got a typo in the last block.
with regards to next steps - if you feel you have identified a defect, please log a support ticket via the normal routes.
if this is considered an enhancement, please submit a request at the Ideas Place for Lumira.
Many thanks,
H

How to find Related Tables for the Tcode given.

How to find Related Tables for the Tcode given. (master data)
Thanks in advance.

Hi Sridhar,
Welcome to SDN.
The tables for a given transaction can be seen in the transaction SE80.
First goto SE93.
Give ur Tcode and find the program name.
Now goto SE80. select program in the first dropdown and give the program name in the second box. U can find the list of tables used.
One more way is : use ST05.
and One more is using FM 'get_tables'
Thanks,
Shailaja
Edited by: Shailaja on Jul 11, 2008 12:33 PM

Sequencing for relation table

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