dynamically find the primary key of a table

Similar Questions

• How to find the primary key columns in the tables in MS Access using SQL queries

  How to find the primary key columns in the tables in MS Access using SQL queries

  Hello

  This is the forum for Windows Vista programs related issues.

  For better assistance, please try instead the Forums in SQL Server .

  Thank you! Vincenzo Di Russo - Microsoft MVP Windows Internet Explorer, Windows Desktop Experience & security - since 2003. ~ ~ ~ My MVP profile: https://mvp.support.microsoft.com/profile/Vincenzo

• need to based on the primary key of different table 2 foreign key constraint

  I'm using Oracle 11.2.0.3.

  I have 2 table invl with invl_pk as primary key and org with org_pk as the primary key.

  In the third table entity_list, I have entity_pk that can be indvl_pk or org_pk.   How can I create this constraint?

  Thanks for your time.

  Hello

  Assuming that your model is correct, then what you describe is a normal type of ER modeling construction known as a relationship of the CRA. It is characterized by an entity with two or more links that are mutually exclusive to each other (XOR). A typical example may be where a person entity and an entity of the Organization relate both to a bank account entity, but a bank account can only be used by a person or an organization in a mutually exclusive way. In order to serve this on a diagram, an arc is drawn between effective relationships on the side of the child, where the name of a relationship of the CRA.

  Google will be of multiple examples and explanations.

  In a perspective of physical databases, this can be implemented in general in two different ways.

  1. assuming that all parents in the relationship of the CRA have identical PK, that is to say, a number that is generated, the child may have a FK of the same type and an entity of type column that defines what entity the FK is. The advantage of this is that it is a bit more compact and is expandable without schema changes if you want to add more relationships. The downside of this is that the CF cannot be defined at the database level and will build on the code to be executed or both in the application and the database as a trigger.

  2. regardless of types PK for parent entities, the child has a separate optional FK appropriate for each relationship in the arc. Each FK is defined at the database level while maintaining the exclusivity of relationships, a constraint is defined on the table that prevents several FK being filled for a given instance. This can be a little messier that there must be a (column/s) FK for each relationship in the arc, but the relationship may be limited to the level of the object database with the help of FK constraints and a check constraint. This could also be considered to be more technically correct implementation.

  Hope this helps

  André

• Returns the primary key of the new line (generated by the trigger) to an insert procedure

  Hello
  I have a table with a primary key (number), which increases with the trigger
  I use a procedure to insert data into this table
  How can I find the primary key of the row inserted to this procedure?

  When you make use of the insert:

  INSERT .... RETURNING key_column INTO variable;
  

  (where key_column is your key on the table column and variable is a variable to store the value of the same data type)

  to get the value in a variable.

• On the primary key

  We declare the primary key of our table... but why are we not using primary key constraint? and what is the meaning of compulsion in oracle

  Read this paper by oracle

  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14200/clauses002.htm

• creating a unique index of instaed of using the primary key index

  Hello
  
  I heard in a debate sometimes it is better to create a unique index on a column and use it instead of using the primary key index in oracle. I did not understand what that the reason propely.
  
  Can someone please help me in this topic if it is valid.
  
  Thanks in advance

  On the surface, which does not seem reasonable... Volume of the DML is irrelevent to determine which column is the primary key for a table.

  My wild speculation a bit at a reasonable time could someone do...

  If you use synthetic primary keys (i.e. the keys generated by sequence) and that your tables are subject to large volumes of inserts such as there is a danger that the block "to the right" will be the source of contention block and worry not about analysis of beach on the column, you can create a reverse on this column (unique or non-unique) key index before creating the primary key constraint and to indicate Oracle to use this existing index to respect the primary key constraint.

  Obviously, however, this involves a lot of assumptions to arrive at a reasonable point. There may well be another set of assumptions that could also lead to a valid argument. Or it could be a myth that someone has heard and just repeats.

  Justin

• Automatically fill the primary key

  We have Oracle database 10g. I've added a primary key column to my deo_language_resources_t of table with the following logic:
  
  -- 1. create sequences
  create sequences eod_lr_seq
  Start increment by 10 by 5
  MinValue 10 nomaxvalue
  NoCache;
  
  -- 2. Create the primary key column
  ALTER table deo_language_resources_t
  ADD NUMBER RESOURCE_ID;
  
  -- 3. Fill the pk
  Update deo_language_resources_t
  Set id_ressource = eod_lr_seq.nextval
  where id_ressource is null;
  
  -- 3. Create the primary key constraint
  ALTER table deo_language_resources_t
  Add constraint resource_id_pk key (resource_id) primary;
  
  insert into deo_language_resources_t
  (first_name, last_name, id_ressource)
  values ('John', 'Doe', eod_lr_seq.nextval);
  
  The last INSERT statement successfully a line inserted into the table and populated by id_ressource with the next number in the sequence eod_lr_seq. Ok.
  
  Is it possible to set a constraint on deo_language_resource_t so that when I INSERT a line the id_ressource is automatically set to eod_lr_seq.nextval? It is possible to define a trigger and resembling the logic of the trigger? The insert statement would be like:
  
  INSERT INTO deo_language_resources_t (first_name, last_name) VALUES ('John', 'Doe');

  create trigger deo_language_resources_trigger
  before insert on deo_language_resources_t
  for each row
  begin
  select eod_lr_seq.nextval into :resource_id from dual;
  end;
  

• Comparison of the data of several rows in a table - based on the primary key

  Currently I have a select statement that returns hundreds of records.  Each returned record is linked to A NUMBER of ORDER this order number has a recipe.  (a bit like a cooking recipe).  Each recipe has many records in the database related to this order number and records should be compared to records in a table that bind to a specific primary key...  (I have already developed the logic to isolate what PK I need).  If all these records that are returned by the select statement below does not match all the records containing PK in the table below, I need to get the next PK and compare all these recordings for select statements return.

  See below for a better understanding. Need a good example detailed on how to solve my problem here.

  Just to help you understand:

  Each element of the recipe is 3 parts (side, ref_des, part_number).  1 single recipe can have several parts (where the part_number), and each of these pieces should be placed on the lower side or top of the Board that is there "side" comes into play.  Same thing with Ref_Des.

  What is going on

  Select statement returns the RECIPE of ORDER NUMBER A.  There will be multiple records returned by this query.

  Select the Return statement:

  • Side
  • Ref_Des
  • Part_Number

  Example of return:

  B c17 75145-2

  T f14 89242-8

  B s12 45123-3

  etc,

  In general - what I need to do:

  There is a table called AUTO_RECIPE_DETAILS.  I take all of the records returned by the select query above and compare for each record in this table relating to the recipe 30319-000001.  30319-000001 a number of records.  It is the primary key for a whole recipe as seen above.  This primary key is bound the number of data records in this table.  The comparison is to see if all records under RECIPE_NAME 30319 -000001 match all the records returned by the select statement.

  IF IT DOES NOT MATCH: recover the following recipe in this table below 30319 -000002 and make the same comparison.
  

  Here's a perfect example of what the table looks like: (AUTO_RECIPE_DETAILS)

  
  

  RECIPE_NAME SIDE REF_DES PART_NUM

  -30319-000001 C16 87595-1 B

  -30319-000002           T B14 74150-4

  -30319-000001 T B14 34251-2          

  -30319-000001            T F24 84180-7

  -30319-000002 T B12 13710-8          

  
  

  
  

  It is the solution to my original question.  By this thread, it's the right answer and I hope this helps someone who is trying to compare two arrays element-by-element.  In the end, the advice given in this thread were correct and I will be using all of your suggestions and the scrapping of this.  Thank you everyone for your help though.

  FOR index_p IN pid_recipe. FIRST... pid_recipe. LAST

  LOOP

  Result WHEN the OUTPUT = 1;

  FOR index_d IN details_recipe. FIRST... details_recipe. LAST

  LOOP

  IF (pid_recipe (index_p). SIDE = details_recipe (index_d). SIDE)

  AND (pid_recipe (index_p). REF_DES = details_recipe (index_d). REF_DES)

  AND (pid_recipe (index_p). PART_NUM = details_recipe (index_d). PART_NUM)

  THEN

  EXIT;

  ON THE OTHER

  DBMS_OUTPUT. Put_line("IT WAS NOT a MATCH");

  result: = 1;

  EXIT;

  END IF;

  END LOOP;

  END LOOP;

  DBMS_OUTPUT. Put_line('LOOP OUT');

• How to fill out the table foreign key to the primary key form

  Hi all

  I'm stuck in this problem for 3 days, and I'm about to research and implement solutions on the internet.

  I have two tables

  create table prim (a number primary key, b varchar2 (100));

  create table CHILD (a number references (a) prim, varchar2 (100)) c;

  I created a page for PRIM table.

  = page name form on PRIM2

  I have manually two columns for the CHILD table to know

  P26_A_1 (for the primary key in the CHILD table)

  P26_C (for the column in the CHILD Table c)

  now when the user clicks on the button CREATE, a row must be inserted into the child table.

  I want to assign the P26_A to P26_A_1 during the validation process, so that a line must be inserted into the PRIM table as well as in the CHILD table.

  How to do this?

  I downloaded my application page in https://apex.oracle.com

  my workspace identifiers are inferior to

  name of the workspace = IMBERT

  username = demo

  password = demo

  kindly guide me.

  Thank you.

  Hello

  I created a new page (page 30) similar to your page and added the insertion of the child. It just check the page and code. It works now, when you insert the prim file is triggered a second trial which inserts the child record manually.

  On page 26 it was some sort of mistake, was easier to create a new as it was almost a standard form.

  Concerning

  Bottom

• Make required error appears only the primary key generated in prior Database Table insert trigger

  Dear all,

  I am a beginner in the ADF and am under Jdeveloper Studio Edition Version 12.2.1.0.0.

  
  

  I'm trying to insert a record, I created the trigger for insertion prior to get the primary key and set some other default values.

  
  

  On the page, I did read-only primary key column and false required.

  
  

  When I try to save - commit (Programmatic), I get errors for the required value. How can I stop this errors.

  
  

  Secondly, I also tried changing the agent to disabled on the attribute View object that raised the error below:

  
  

  < oracle.dfw.impl.incident.DiagnosticsDataExtractorImpl > < DiagnosticsDataExtractorImpl > < createADRIncident > < incident created 148 to key problem "DFW-99998 [oracle.jbo.PersistenceException] [oracle.jbo.server.RowReference.verifyPrimaryKeys] [Proposals]" >

  
  

  Hoping for help.

  
  

  Thanks and greetings

  
  

  Arif Khadas
  

  If the primary key values from DB sequence, you can follow this approach:

  Using the sequence of database in ADF - Souza Waslley Blog

  Oracle Fusion Middleware Technologies: ADF 11 G: generate the primary key sequence number

  Otherwise, instead of DB trigger, create the DB function that retrieves the value of the PK and call stored function in the overloaded method create() entity:

• Too many objects correspond to the primary key

  I read a lot of posts on this topic, but they are all related to the addition of new records.  My situation is a little different.

  I have a SelectOneChoice with AutoSubmit set to True.

  I have 2 tables that are related to the value of the SelectOneChoice with partial triggers defined on the SelectOneChoice.

  When I make a selection of the SelectOneChoice, I get the error "too many objects match the [primary key n] oracle.jbo.Key" where n is the primary key of the selection in the SelectOneChoice.

  Nothing is to be added/created.

  The end result should be that the tables get updated with correct lines that match the selection of SelectOneChoice.

  Any ideas on where to find questions, please let me know.

  JDEV 11.1.1.6

  Thank you

  Ray

  Why is - what drag you only the attribute ID of OrgRefView to your page? Why don't you drag the whole view of the page object?

  I think that is what is happening:

  The SelectOneChoice shows the ID attribute of the first line of OrgRefView. When you select a different value in the SelectOneChoice, you change the value of the ID of this line. And that's why the error message shows. You change the value of the ID of this line to the value of the ID of another line. And you can't have the same ID value for both lines.

  Try to drag the OrgRefView in the table on the page. Then, you can select a line and will display the appropriate details.

  Kind regards

  Linda

• Problems with the primary key of the query string

  Moving from asp to php, to work with David Power's book: The Essential Guide to Dreamweaver CS4 with CSS, AJAX, and PHP.  Recycling of my brain, so starting from scratch in the learning process.

  Everything was going perfectly until I tried to add the primary key of a record in a query string.  I compared my code with the example code for the book, and everything matches.  When previewing the page in my browser and hover over the link which must pass the main code on the next page, the query string does not appear correctly.  It shows user_id = but no figure shows, as it is supposed to.  www.webpage.com/update_user.php?user_id=

  Here is my code: (Please note, <>have been removed, as I was unable to find a way view the code in the correct way here (copy/paste was doesn't work do not, nor insert syntax))

  ? PHP {?}

  ? PHP echo $row_listUser ['family_name'];? PHP echo $row_listUser ["FirstName"];?

  ? PHP echo $row_listUser ['username'];?       ? PHP echo $row_listUser ["admin_priv"];?

  a href = "update_user.php? user_id =? php echo $row_listUser ['user_id'];?" "Edit / has

  a href = "delete_user.php? user_id =? php echo $row_listUser ['user_id'];?" ' Delete / has

  ? PHP} while ($row_listUser = mysql_fetch_assoc ($listUser));?

  Any ideas that could help me understand why this part does not in particular would be greatly appreciated.  Writing to the database worked perfectly, I see that there are numbers in the database as user_id, and it is defined as my primary key in the configuration database.  Such a simple process that is causing me headaches!

  Thank you

  You have the code to request a copy in your folder:

  $query_listUser = 'SELECT user_id, username, first_name, family_name, admin_priv from users ORDER BY family_name ASC';

  $listUser = mysql_query ($query_listUser, $connSCFDIR) or die (mysql_error ());

  $row_listUser = mysql_fetch_assoc ($listUser);

  $totalRows_listUser = mysql_num_rows ($listUser);

  $query_listUser = 'SELECT username, first_name, family_name, admin_priv from users ORDER BY family_name ASC';

  $listUser = mysql_query ($query_listUser, $connSCFDIR) or die (mysql_error ());

  $row_listUser = mysql_fetch_assoc ($listUser);

  The $listUser table will contain the results of the second query, which does not include the field user_id. delete the redundant code.

• How to find the child level for each table in a relational model?

  Earthlings,
  
  I need your help, and I know that, "Yes, we can change." Change this thread to a question answered.
  
  So: How to find the child level for each table in a relational model?
  
  I have a database of relacional (9.2), all right?
  

  .
       O /* This is a child who makes N references to each of the follow N parent tables (here: three), and so on. */
      /↑\ Fks
     O"O O" <-- level 2 for first table (circle)
    /↑\ Fks
  "o"o"o" <-- level 1 for middle table (circle)
     ↑ Fk
    "º"

  Tips:
  -Each circle represents a table;
  -Red no tables have foreign key
  -the picture on the front line of tree, for example, a level 3, but when 3 becomes N? How is N? That is the question.
  
  I started to think about the following:
  
  First of all, I need to know how to take the kids:

  select distinct child.table_name child
    from all_cons_columns father
    join all_cons_columns child
   using (owner, position)
    join (select child.owner,
                 child.constraint_name fk,
                 child.table_name child,
                 child.r_constraint_name pk,
                 father.table_name father
            from all_constraints father, all_constraints child
           where child.r_owner = father.owner
             and child.r_constraint_name = father.constraint_name
             and father.constraint_type in ('P', 'U')
             and child.constraint_type = 'R'
             and child.owner = 'OWNER') aux
   using (owner)
   where child.constraint_name = aux.fk
     and child.table_name = aux.child
     and father.constraint_name = aux.pk
     and father.table_name = aux.father;

  Thought...
  We will share!
  
  Thanks in advance,
  Philips
  
  Published by: BluShadow on April 1st, 2011 15:08
  formatting of code and hierarchy for readbility

  Have you looked to see if there is a cycle in the graph of dependence? Is there a table that has a foreign key to B and B has a back of A foreign key?

  SQL> create table my_emp (
    2    emp_id number primary key,
    3    emp_name varchar2(10),
    4    manager_id number
    5  );
  
  Table created.
  
  SQL> ed
  Wrote file afiedt.buf
  
    1  create table my_mgr (
    2    manager_id number primary key,
    3    employee_id number references my_emp( emp_id ),
    4    purchasing_authority number
    5* )
  SQL> /
  
  Table created.
  
  SQL> alter table my_emp
    2    add constraint fk_emp_mgr foreign key( manager_id )
    3         references my_mgr( manager_id );
  
  Table altered.
  
  SQL> ed
  Wrote file afiedt.buf
  
    1   select level lvl,
    2          child_table_name,
    3          sys_connect_by_path( child_table_name, '/' ) path
    4     from (select parent.table_name      parent_table_name,
    5                  parent.constraint_name parent_constraint_name,
    6                  child.table_name        child_table_name,
    7                  child.constraint_name   child_constraint_name
    8             from user_constraints parent,
    9                  user_constraints child
   10            where child.constraint_type = 'R'
   11              and parent.constraint_type = 'P'
   12              and child.r_constraint_name = parent.constraint_name
   13           union all
   14           select null,
   15                  null,
   16                  table_name,
   17                  constraint_name
   18             from user_constraints
   19            where constraint_type = 'P')
   20    start with child_table_name = 'MY_EMP'
   21*  connect by prior child_table_name = parent_table_name
  SQL> /
  ERROR:
  ORA-01436: CONNECT BY loop in user data
  

  If you have a cycle, you have some problems.

  (1) it is a NOCYCLE keyword does not cause the error, but that probably requires an Oracle version which is not so far off support. I don't think it was available at the time 9.2 but I don't have anything old enough to test on

  SQL> ed
  Wrote file afiedt.buf
  
    1   select level lvl,
    2          child_table_name,
    3          sys_connect_by_path( child_table_name, '/' ) path
    4     from (select parent.table_name      parent_table_name,
    5                  parent.constraint_name parent_constraint_name,
    6                  child.table_name        child_table_name,
    7                  child.constraint_name   child_constraint_name
    8             from user_constraints parent,
    9                  user_constraints child
   10            where child.constraint_type = 'R'
   11              and parent.constraint_type = 'P'
   12              and child.r_constraint_name = parent.constraint_name
   13           union all
   14           select null,
   15                  null,
   16                  table_name,
   17                  constraint_name
   18             from user_constraints
   19            where constraint_type = 'P')
   20    start with child_table_name = 'MY_EMP'
   21*  connect by nocycle prior child_table_name = parent_table_name
  SQL> /
  
         LVL CHILD_TABLE_NAME               PATH
  ---------- ------------------------------ --------------------
           1 MY_EMP                         /MY_EMP
           2 MY_MGR                         /MY_EMP/MY_MGR
           1 MY_EMP                         /MY_EMP
           2 MY_MGR                         /MY_EMP/MY_MGR
  

  (2) If you try to write on a table and all of its constraints in a file and do it in a valid order, the entire solution is probably wrong. It is impossible, for example, to generate the DDL for MY_EMP and MY_DEPT such as all instructions for a table come first, and all the instructions for the other are generated second. So even if NOCYCLE to avoid the error, you would end up with an invalid DDL script. If that's the problem, I would rethink the approach.

  -Generate the DDL for all tables without constraint
  -Can generate the DDL for all primary key constraints
  -Can generate the DDL for all unique key constraints
  -Can generate the DDL for all foreign key constraints

  This is not solidarity all the DOF for a given in the file object. But the SQL will be radically simpler writing - there will be no need to even look at the dependency graph.

  Justin

• Can I get a configuration of single language somewhere? How can I find the license key for my installation.

  Original title: single language of windows 8

  I had 8 single language on dell inspiron 15-3521 pre-installed windows. I did repartitioning disks and windows recovery options 8 as 'reset your pc' and "Refresh your pc" has stopped working, saying that the not found recovery partition, but it was intact. I have no recovery disk.

  Can I get a configuration of single language somewhere? How can I find the license key for my installation.

  Hi Mohammed'metwally,.

  Please answer this question to get more clarity on this issue.

  • The application or program that you use the partition of the drive?

  This problem may occur if the partition table is damaged or altered. As a result, the recovery partition does not work. I'm sorry to know that you are facing this problem.

  You will not get the unique language anywhere to download setting. You have an OEM computer that comes with the product key integrated into the BIOS. The product key of Windows 8 on new machines is now integrated in the machine. It uses the Secure Boot technology. When you perform a new installation of Windows 8, the installation program ask a product key and will be automatically get it from your system and proceed with the installation.

  As Windows 8 came pre-installed, you must contact the manufacturer of the computer with this problem for more help.

  http://en.Community.Dell.com/?~CK_=_mn

  Dell technical support: http://www.dell.com/support/contents/us/en/04/category/Contact-Information/Technical-Support?c=us&l=en&s=bsd&cs=04

  Thank you.

• Two constraints of primary key of a table with two different constraint name

  Hi guys

  I am creating the table below

  Table name: TITLE_COPY

  Column name	Copy_id	Title_id	Status
  Key type	PK	PK, FK
  Unique	NN, U	NN, U	NN
  Check			Available, destroyed, leased, reserved
  Table Ref FK		Title
  FK Ref Col		Title_id
  Data type	Number	Number	Varchar2
  Length	10	10	15

  The SQL statement below can create it

  CREATE TABLE title_copy (copy_id NUMBER (10),)

  title_id CONSTRAINT NUMBER (10) title_copy_title_id_fk title (title_id) REFERENCES.

  primary key constraint title_copy_title_id_pk title_id (copy_id)

  status VARCHAR2 (15) NOT NULL CONSTRAINT status_ck CHECK (status IN ('AVAILABLE', 'DESTROYED', 'RENTAL', 'RESERVED'))

  );

  Two primary keys (title_id, copy_id) are created with the same name of constraint (title_copy_title_id_pk) (-> table-level constraint). What happens if I want to have two different names of the primary key constraint, say title_copy_title_id_pk for the title_id column and title_copy_copy_id_pk for the copy_id column?

  I can do that with a column-level constraint? Something like below (complains about the additional primary key)

  CREATE TABLE title_copy (copy_id NUMBER (10) CONSTRAINT title_copy_copy_id_pk PRIMARY KEY,)

  constraint title_copy_title_id_pk primary key (title_id).

  title_id CONSTRAINT NUMBER (10) title_copy_title_id_fk title (title_id) REFERENCES.

  status VARCHAR2 (15) NOT NULL CONSTRAINT status_ck CHECK (status IN ('AVAILABLE', 'DESTROYED', 'RENTAL', 'RESERVED'))

  );

  In summary, I can define two primary keys with the name of different constraint in a column-level constraint?

  There are no two primary keys. There is a primary key made up of two columns - also called a composite key.

  A table can have at least a primary key. You can, if you wish, create a unique constraint on a different set of columns.