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

Similar Questions

• How to refer to the primary key column of newly inserted rows of tabular form

  Hello

  I use APEX 4.2.0.00.27 with Oracle DB 11.2.0.3.0.

  I work with a tabular presentation wizard-created for insert and update a table using the integrated SRM process (sequence 10).  I'm trying to use a process of anonymous block of PL/SQL (sequence 30) to make another manipulation of table after the records were inserted or updated.  The manual process is associated with my tabular form and I use the variables of name of column binding in my program block.

  My (rsn_test) table has 3 columns: test_id (number), test_nbr (number), test_id2 (number).  Test_id column is identified as the primary key and the type of the source already exists a sequence rsn_test_seq.  Column test_id2 gets its default value 0 to a hidden page element.

  I would use my manual process for updating the value of the test_id2 column.  If it's 0 then I want to put the value of the column test_id.  If it is any other value, then it must remain at this value.  My logic works very well for an existing line, but I'm running into a problem with the newly added lines.  The new lines get inserted, but the test_id2 column remains the default value 0.  I can tell the debugger that the SRM process is triggered first and inserts the line, then my manual dealing with fires.  The problem seems to be that the connection variable: TEST_ID for the primary key column remains NULL after insertion.  I don't know how to get the value of the column test_id of my newly created line to use in my PL/SQL block to my update.

  Process of PL/SQL:

  DECLARE
  BEGIN
     :P7_SHOW := NULL;
     :P7_SHOW := NVL(:TEST_ID2,555) || ' and ' || NVL(:TEST_ID,787) || ' and ' || NVL(:TEST_NBR,9999);
     IF :TEST_ID2 = 0 AND :TEST_ID IS NOT NULL THEN
        UPDATE rsn_test
           SET test_id2 = :TEST_ID
         WHERE test_id = :TEST_ID;
     ELSE
        :TEST_ID2 := :TEST_ID2;
     END IF;
  END;
  
  

  Excerpt from the debugger:

  0.01625 0.00010 Processes - point: ON_SUBMIT_BEFORE_COMPUTATION
  0.01635 0.00008 Branch point: Before Computation
  0.01643 0.00003 Process point: AFTER_SUBMIT
  0.01646 0.00022 Tabs: Perform Branching for Tab Requests
  0.01668 0.00008 Branch point: Before Validation
  0.01676 0.00024 Validations:
  0.01700 0.00135 Perform basic and predefined validations:
  0.01835 0.00020 Perform custom validations:
  0.01855 0.00049 ...Validation "TEST_NBR must be numeric" - Type: ITEM_IS_NUMERIC
  0.01904 0.00007 ......Skip for row 1 because row hasn't changed
  0.01911 0.00016 ......Skip for row 2 because row hasn't changed
  0.01927 0.00012 ...Validation "TEST_ID2 must be numeric" - Type: ITEM_IS_NUMERIC
  0.01939 0.00007 ......Skip for row 1 because row hasn't changed
  0.01945 0.00018 ......Skip for row 2 because row hasn't changed
  0.01964 0.00005 Branch point: Before Processing
  0.01968 0.00004 Processes - point: AFTER_SUBMIT
  0.01972 0.00588 ...Process "ApplyMRU" - Type: MULTI_ROW_UPDATE
  0.02560 0.00154 ...Execute Statement: declare function x return varchar2 is begin begin for c1 in ( select "RSN_TEST_SEQ".nextval pk from sys.dual ) loop return c1.pk; end loop; end; return null; end; begin wwv_flow.g_value := x; end;
  0.02714 0.00140 ......Row 3: insert into "APPPCSRSN"."RSN_TEST" ( "TEST_ID", "TEST_NBR", "TEST_ID2") values ( :b1, :b2, :b3)
  0.02854 0.00011 ...Process "ApplyMRD" - Type: MULTI_ROW_DELETE
  0.02865 0.00004 ......Skip because condition or authorization evaluates to FALSE
  0.02869 0.00015 ...Process "Process Submit" - Type: PLSQL
  0.02884 0.00007 ......Skip for row 1 because row hasn't changed
  0.02891 0.00012 ......Skip for row 2 because row hasn't changed
  0.02903 0.00012 ......Process row 3
  0.02915 0.00429 ...Execute Statement: begin DECLARE BEGIN :P7_SHOW := NULL; :P7_SHOW := NVL(:TEST_ID2,555) || ' and ' || NVL(:TEST_ID,787) || ' and ' || NVL(:TEST_NBR,9999); IF :TEST_ID2 = 0 AND :TEST_ID IS NOT NULL THEN UPDATE rsn_test SET test_id2 = :TEST_NBR WHERE test_id = :TEST_ID; ELSE :TEST_ID2 := :TEST_ID2; END IF; END; end;
  0.03344 0.00013 ...Session State: Saved Item "P7_SHOW" New Value="0 and 787 and 1300"
  0.03356 0.00004 Branch point: After Processing
  0.03360 0.00048 ...Evaluating Branch: "AFTER_PROCESSING" Type: REDIRECT_URL Button: (No Button Pressed) Condition: (Unconditional)
  0.03407 0.00013 Redirecting to f?p=290:7:8717971109610:::::&success_msg=0%20row(s)%20updated%2C%201%20row(s)%20inserted.Success%2FEBD244168556408CBA714E3974918C09%2F
  0.03420 0.00012 Stop APEX Engine detected
  0.03432 0.00007 Stop APEX Engine detected
  0.03439 - Final commit
  
  

  Any suggestions?

  I have run tests on

  https://apex.Oracle.com/pls/apex/f?p=83488:1 demo/demo

  to see your problem.

  I have 2 solution for your problem.
  I add trial NOT tabular just usual block of PL/SQL

  	BEGIN
  	I'm IN (SELECT TEST_ID FROM RSN_TEST WHERE TEST_ID2 = 0)
  	LOOP
  	UPDATE RSN_TEST
  	SET test_id2 = TEST_ID
  	WHERE test_id = i.TEST_ID;
  	END LOOP;
  	END;

  and works very well, you can see in the sample.

  The other solution is to show new generated TEST_ID

  Adding a sequence as a default value for a column in a table field

  And to execute your procedure.

  I get how is with the good luck of time.

  By

• How to extract the values of the line full in the bean to support using the primary key

  Hello

  I have a table that has columns as plant_name, business planner email id and identification of email resident engineer. Here, Plant_name is the primary key.

  Now, I have this plant's name slipped and dropped like selectonechoice (drop) on page jsff. In this user can select any name of 1 plant drop down.

  Right now, I can go get plant in backing bean name, but I can't understand how business plan for extraction and identification of email of the engineer resident in this key primary-plant_name at the bean to support.

  Please let me know if anyone has an idea in this regard.

  JDeveloper version 11.1.1.6.0

  Thanks in advance.

  Sneha

  Sneha211 wrote:

  On the jsff page

  required = "#{bindings." Plant.hints.Mandatory}.

  shortDesc = "#{bindings." Plant.hints.ToolTip}.

  ID = "soc1" unselectedLabel = "- Select -"

  autoSubmit = 'true '.

  Binding = "#{backingBeanScope.backingbean.plantbean}" > "

  ID = "si1" / >

  In backing bean

  DCBindingContainer = lBindingContainer

  (DCBindingContainer) BindingContext.getCurrent () .getCurrentBindingsEntry ();

  DCIteratorBinding lBinding = lBindingContainer.findIteratorBinding("SupplierVO1Iterator");

  NewRow row = lBinding.getCurrentRow ();

  String aamplant1 = (String) newRow.getAttribute ("Plant");

  Hi Sneha, you've written code for it

  you have found the current line and the primary key then this line, then why you not not using this same rank to get the other attributes?

  NewRow row = lBinding.getCurrentRow ();

  String aamplant1 = (String) newRow.getAttribute ("Plant");

  String businessPalnner = (String) newRow.getAttribute ("business_planner"); Returns the value of the same line
  

  Engineer in String = (String) newRow.getAttribute ("engineer");

  
  

  OR if your condition is like that-

  you have a primary key field value, but you do not have the corresponding line, then you can get that line and it's attribute by using the primary key value

  See - http://adfgouravtkiet.blogspot.in/2012/10/filtering-of-data-from-vo.html

  Hope it helps

  -Ashish
  

• using a sequence as the primary key

  I use a sequence for the primary key of the database for dimensions (following Kimball methodology). In ODI, I define another unique key as principal. It will not let you select check null = true and therefore a sequence can serve as primary. Someone at - it something differently.

  ss396s wrote:
  I use a sequence for the primary key of the database for dimensions (following Kimball methodology). In ODI, I define another unique key as principal. It will not let you select check null = true and therefore a sequence can serve as primary. Someone at - it something differently.

  You must follow the rules on the sequence
  1 > it cannot be run on the source
  2 > may not be a part of your key update
  3 > check not the null check box should not be selected
  4 > separate box must not be activated

  If you use a sequence for the primary key for the database, and then identify another or several columns are coming from the source and use that you can only identify a row. Use these columns as your key to update.

  Thank you
  Fati

• Question about when Oracle checks the primary keys

  I had data as follows in a table:

  id1  id2
  ---- ----
     1    2
     3    1

  Id1 is the primary key and what I wanted to do was

  update this_table set id1 = id2 where id2 in (1,2);

  I was afraid that if he updated the line with id2 = 1 first of all, it would fail on a unique key constraint. Rather than take this chance I did it with two separate update statements. But I wondered, would he worked with an update? Are primary keys verified at the level of the line or at the level of the statement?
  My level of Oracle 10 g (10.2.0.4.0) is

  Pretty easy to test:

  SQL> CREATE TABLE t (
    2     id1 NUMBER PRIMARY KEY,
    3     id2 NUMBER);
  
  Table created.
  
  SQL> INSERT /*+ APPEND */ INTO t
    2  SELECT id1, id2
    3  FROM (SELECT ROW_NUMBER() OVER(ORDER BY object_id) id1,
    4               ROW_NUMBER() OVER(ORDER BY object_id desc) id2
    6        FROM all_objects)
    7  ORDER BY DBMS_RANDOM.Value();
  
  18247 rows created.
  
  SQL> COMMIT;
  
  Commit complete.
  
  SQL> SELECT * FROM t;
  
         ID1        ID2
  ---------- ----------
        4498      13750
        3268      14980
       14947       3301
       12776       5472
        3796      14452
       10425       7823
        7182      11066
       14917       3331
            
  
  SQL> SELECT * FROM t ORDER BY id1;
  
         ID1        ID2
  ---------- ----------
           1      18247
           2      18246
           3      18245
           4      18244
           5      18243
           6      18242
           7      18241
           8      18240
           9      18239
          10      18238
            
  
  SQL> SELECT * FROM t ORDER BY id1 desc;
  
         ID1        ID2
  ---------- ----------
       18247          1
       18246          2
       18245          3
       18244          4
       18243          5
       18242          6
       18241          7
       18240          8
       18239          9
       18238         10
            
  
  SQL> update t set id1 = id2;
  
  18247 rows updated.
  
  Execution Plan
  ----------------------------------------------------------
  Plan hash value: 4143155445
  
  ---------------------------------------------------------------------------
  | Id  | Operation          | Name | Rows  | Bytes | Cost (%CPU)| Time     |
  ---------------------------------------------------------------------------
  |   0 | UPDATE STATEMENT   |      | 18247 |   463K|     5   (0)| 00:00:01 |
  |   1 |  UPDATE            | T    |       |       |            |          |
  |   2 |   TABLE ACCESS FULL| T    | 18247 |   463K|     5   (0)| 00:00:01 |
  ---------------------------------------------------------------------------
  

  within a single transaction, so that the end result does not violate the PK operation will succeed.

  SQL> rollback;
  
  Rollback complete.
  
  SQL> update t set id2 = 50 where id2 = 123;
  
  1 row updated.
  
  SQL> commit;
  
  Commit complete.
  
  SQL> update t set id1 = id2;
  update t set id1 = id2
  *
  ERROR at line 1:
  ORA-00001: unique constraint (OPS$ORACLE.SYS_C001154403) violated
  

  John

• 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.

• APEX do not allow to change the lines of the columns that are the primary key?

  I have pictures:
  http://img508.imageshack.us/my.php?image=21269582oe8.jpg
  
  
  Book (id_book - 'Primary key', title, year); book_author (id_author id_book - 'Primary key', - 'Primary key'); author (id_author - "Primary key", name)
  
  
  
  I created a new page-> Form-> form of 'author' table because I want to add new authors, modification and deletion. During the creation of this page, I have chosen column 'id_author' as '1 primary key column' and everything is OK (I can't edit the 'id_author' column - this column is autoincrement and I can change the 'name' column).
  
  BUT I also created a new page-> Form-> table for table "book_author" because I like to write numbers like id_book and id_author, change and remove them (so add relations between tables: book, book_author and author). During the creation of this page, I have chosen column 'id_book' as '1 primary key column' and 'id_author' as 'column primary key 2'. And on the Web site, I can't edit these fields. And I can not add also new line because I see in each new line: (null).
  
  http://img444.imageshack.us/my.php?image=11324615yk9.jpg
  
  APEX do not allow to change the lines of the columns that are the primary key? It's stupid... What can I do?
  
  Edited by: user10731158 2008-12-20 11:40

  Column unique and not meaningful if you ever want to update. In the case of your example, you need to add an ID column in the intersection of book_author table. Honestly, I was so blown away (and pleasantly surprised) by the absence of rebuttal and the "thx" I advanced and set up an example of how I would define the book_author table:

  create table  book_author
     (id varchar2(32),
      book_id varchar2(32),
       author_id varchar2(32),
       modified_on     date,
       modified_by varchar2(255),
       constraint book_author_pk primary key (id),
       constraint book_auth_book_fk foreign key (book_id) references books(id),
       constraint book_auth_author_fk foreign key (author_id) references authors(id)
       )
  /
  
  create unique index book_author_uq on book_author (book_id,author_id)
  /
  
  create or replace trigger  biu_book_author before insert or update on book_author
  for each row
  begin
       if inserting then
            :new.id := sys_guid();
       end if;
       modified_on := sysdate;
       modified_by := nvl(v('APP_USER'),user);
  end;
  /
  

  Good luck
  Tyler

• 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

• Too many objects correspond to the primary key oracle.jbo.Key

  I get this error: Too many objects match the primary key oracle.jbo.Key when I tried to look for in a display object where the primary key is consists of more than one filed.

  Use case:

  In Jdeveloper 11.1.2.3 I Entity object called someTable this table has three fields A,B and C where the primary key is consist class towing A and B .

  I created different towing View object of someTable object enity that are someTableVO1 and someTableVO2 . Rated A in the view object somtableVO1 is a List Of Value(LOV) and the data are coming form filed A in the someTableVO2 .

  In application I have a search page that contains a drop-down list of registered A in somTableVO1 . Based on certain conditions, the drop-down list of the values in the list is not static. The value of the drop-down list is editable based on a select query run on someTableVO1 and it is based on the class thried C is NOT part of the primary key .

  The page displays the drop down menu with the correct values. But I have a ValeChangeListener method that will be activated whenever the user selects a value form the drop-down list.

  The problem is:

  The error Too many objects match the primary key is occur whenever I am executing this method.

  Support:

  I think the problem is with multiple fields for the primary key. of curse, there is an overlap in a part of the primary key (IE that paid A or B ) but the combination of A and B are always unique.

  Notes:

  1. I check the query by executing SQL Developer and it shows not all duplicate values.

  2 I don't attach code, because I think that the problem is not on (how to) this is (what to do).

  I hope that the idea is clear

  Problem solved.

  My goal was to show a summer that A form someTableVO1 as a list of value and I was trying to achieve by creating the list of value the same form Entity object . I understand that it was the wrong approach (correct me if I'm wrong). to achieve this in ADF technology, I have to do the following:

  1. Simply to drag and drop the view object from the Data Controls page.
  2. List of options appears asking how you want to display the view object (shape, chart, table, only one selection,...).

  3. Select Single Selection ->ADF one Selection

  4. Select the attributes that you want to show the user a list of values.

  Thanks for your comments.

• 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

• implement the primary key on the field of forms

  Hello experts,
  
  I have a form with deptno single base table.
  dept_name and deptno. DEPTNO is a primary key in the database table.
  When I get the records, it prevents to insert the value that is duplicated in the deptno text box when I insert or update.
  
  the form I create a block with the base table, apply the primary key property of this Dept block. is Yes.
  then I put the key property primary deptno fields to yes.
  When I get duplicate records and then save, it prevents insertion but I want the following:
  
  I run the form, when I enter the first record, if it exists in the table can prevent to insert. also after the first record was inserted.
  If I insert to new deptno even into the next record, it must also prevent.
  
  Please help me.
  
  Thank you
  Yoann

  You have built your data forms to help block the "data block Wizard? If so, it already identified DEPTNO as the PK column. If it does not, or you have built your data manually block, you can open the palette property for the DEPTNO element and set the primary key property Yes. When this property is set on an element, the corresponding property of block, primary to apply key must also be set to yes. Please remember, however, that the Act of mark the DEPTNO as a PK does not 'Real time' checking for duplicates. Checking for duplicates occur when validation occurs. If you need a real-time duplicate check, you will need to write code to allow audits in double 'real time '.

  There are numrous examples in the forum to check duplicate in real-time as well as examples on the Internet. A search on Google for 'Check' the locker double shaped will give you lots of good examples.

  Craig...

• Hi cannot see the column in the primary key as a master detail

  I have a form master detail. In the first form master, I am unable to see the primary key
  Now, the form is based was completely and I'd also like to see the visible primary key column in the main report
  
  
  If I put the primary key as rowid then I should have seen the primary key.
  Now I can see the pencil icon (the icon of pencil to the rank nedopil) instead of the actual primary key column. who's a number of data...
  I'd like to be too visible. Can we guide what should I do for this...
  Thank you

  Are not only in the hidden items? Change the settings for them to be unhidden.

• best method to update the primary key

  Can someone tell me the best possible method to update the primary key so that the foreign key is also updated.
  Please explain with example

  940340 wrote:
  Can someone tell me the best possible method to update the primary key so that the foreign key is also updated.
  Please explain with example

  You're after a mechanism that lets you update the primary key sometimes on some lines, or did you just impossible, which means that you must update all the data because of some kind of change in the structural definition?

  If all you need is a rational method to change keys sometimes (and this isn't quite mortal sin that other posters have been suggesting) then recreate your foreign key as a constraint can be delayed may help.

  Oracle allows no you cascading updates automatically for primary keys, but if the foreign key is carried forward you can proceed as follows:

  set constraint {foreign key constraint name} deferred;
  update parent primary key;
  update child foreign key;
  set constraint {foreign key constraint name} immediate;
  

  Concerning
  Jonathan Lewis

• Another user has changed the primary key

  uses 11.1.1.5.0 - adfbc jdev
  
  After each insertion while saving the recording
  get error like this > > > another user has changed the primary key
  
  What should I do to avoid this?
  

  <?xml version = '1.0' encoding = 'UTF-8'?>
  <BC4JConfig version="11.1" xmlns="http://xmlns.oracle.com/bc4j/configuration">
     <AppModuleConfigBag ApplicationName="com.rits.glm.model.servicesAM.generalLedgerAM">
        <AppModuleConfig DeployPlatform="LOCAL" JDBCName="goodwell" jbo.default.country="IN" jbo.project="com.rits.glm.GeneralLedger" name="generalLedgerAMLocal" ApplicationName="com.rits.glm.model.servicesAM.generalLedgerAM">
           <Database jbo.locking.mode="optimistic"/>
           <Security AppModuleJndiName="com.rits.glm.model.servicesAM.generalLedgerAM"/>
        </AppModuleConfig>
        <AppModuleConfig DeployPlatform="LOCAL" JDBCName="goodwell" jbo.default.country="IN" jbo.project="com.rits.glm.GeneralLedger" name="generalLedgerAMShared" ApplicationName="com.rits.glm.model.servicesAM.generalLedgerAM">
           <AM-Pooling jbo.ampool.dynamicjdbccredentials="false" jbo.ampool.isuseexclusive="false" jbo.ampool.maxpoolsize="1" jbo.ampool.resetnontransactionalstate="false"/>
             <Database jbo.locking.mode="optimistic"/>
           <Security AppModuleJndiName="com.rits.glm.model.servicesAM.generalLedgerAM"/>
        </AppModuleConfig>
     </AppModuleConfigBag>
  </BC4JConfig>

  a few suggestions
  Houston-25014: another user has changed...
  http://adfhowto.blogspot.com/2010/12/troubleshooting-another-user-has.html
  Another user changed the row with primary key

• 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;