Composite key mapping.

Similar Questions

• Integrate Hibernate L2 cache with consistency in the composite key of reference

  Hi all:
  I have a problem when I activate the Hibernate l2 cache integrated with consistency. When the entity class using this string or unique integer primary key, the L2 cache has worked well. But when I use the entity with composite key class, I had the problem.
  I wrote a script to test junit to test the session.get method, when I run the test cases for the first time, the miss of the entity to load the object from the cache, Hibernate will trigger a DB query so it box as an object, then put it in the cache. But when I run the test case, again, I found the Hibernate trigger a query once again, which was strange... (it should not have happened, I should got the object from the cache), then, I used the console cache coherence to list the data in the cache and finding himself under the information:
  ###########################################
  (Hi) map: list
  model. SiteUserInfo #model. SiteUserID@323819 = Item {version = null, freshTimestamp = 1333943690484
  model. SiteUserInfo #model. SiteUserID@323819 = Item {version = null, freshTimestamp = 1333943600419
  ###########################################
  There are two keys with the same value cached... (I put already implemented method hashcode and equals to SiteUserID object). someone there has the same problem? Or L2 Hibernate with composite key can integrate with consistency?
  
  Rip off code SiteUserID
  #####################################
  @Override
  public boolean equals (Object obj) {}
  If (obj == this) {}
  Returns true;
  }
  If (!) () obj instanceof SiteUserID)) {}
  Returns false;
  }
  SiteUserID id = (SiteUserID) obj;
  return new EqualsBuilder () .append (sid, id.getSid ()) .append (name, id.getName ()) .isEquals ();
  }
  
  @Override
  public int hashCode() {}
  return new HashCodeBuilder () .append (sid) .append (name) .toHashCode ();
  }
  ###################################

  Hi John,.

  I think there may be another problem.

  Please reference:
  http://blackbeanbag.NET/WP/2010/06/06/coherence-key-HOWTO/
  For entry cache, partitioned cache is placed in backup card in binary form.
  The main objects of the same data must always be serialized in binary form even.

  Unfortunately, use Hibernate CacheKey is as key cache L2.
  And CacheKey is somewhat complex, some related attributes use TreeMap as their type.
  "Java gives no guarantee on the order in a hash table and serialization is dependent on the command."
  (reference http://stackoverflow.com/questions/9337126/how-can-oracle-coherence-get-fail-with-retrieved-key-object)

  So... you may need to modify the source code of some Hibernate, ex: replace the FastHashMap in TreeMap...
  I tried, it looks like work. I'll send you have modified source codes.

  Best regards
  Leon

• WebLogic 12 c | Reports | key mapping issues. cgicmd.dat

  Hi guys

  I managed to configure Weblogic 12 forms and States on Windows 10 & having a minor problem with the key mapping for the (current) report server

  I added a key to the file cgicmd.dat as follows

  Userlogin: userid=APPS/APPS@sct % * (who has worked with 10.3.6 weblogic 11 g) and call reports Forms as follows:

  Web.Show_Document ('/ reports/rwservlet? userlogin & desformat = PDF & destype = cache & report ='|: CTRL.) REPORT_NAME | ("& paramform = Yes, '_new');

  This call blocks the report server, while a call as follows

  Web.Show_Document ('/ reports/rwservlet? userid=APPS/APPS@sct & desformat = PDF & destype = cache & report ='|: CTRL.) REPORT_NAME | ("& paramform = Yes, '_new');

  works perfectly. I have checked and confirmed that the map file is loaded correctly.

  Please suggest me what could be the problem.

  Thank you and best regards,

  Hello Irfan

  I don't know if the solution that I found is really worth sharing, yet:

  I disabled IPV6 completely from my Windows 10 box

  Deleted the folder tmp for the WLS_REPORTS

  Restart the servers & and the mapping of the keys works fine now.

  Kind regards

• How to update a record, if it is a composite key (primary key is based on two columns) in the OPS? page?

  Hello

  Actually I got to know this update of a record must be made when the primary key is based on two columns.

  Previously, I used SPEL for a column. It was working fine.

  But I came to know that regardless of the folder I try to update, it was the update page is coming up with the first combination of the record.

  As if RC 131

  RC 124

  RC 125 are the records.

  If I click on update of RC 124 also, the update page is coming up with RC 131 values as it is the first.

  So I understand that the SPEL should be based on two parameters, because it is a composite key.

  How to do?

  Please let me know if you don't understand the problem.

  Thank you.

  Wow!

  I got it.

  Thank you brothers, always a hope that you could help me

• Index on the Composite key to solve enq: TM - contention

  Version: Oracle 10g

  Hello

  I had enq: TM - restraints in my database, and I want to apply the index on the foreign key of one of the table column.

  But I see there are composite foreign keys and foreign keys unique in the table.

  Only foreign key I can easily create the index, but my doubt is that, for a composite foreign key,.

  Do I need to create the composite indexes on each column of the composite key or composite foreign key columns, I have to apply clue to solve the enq: TM - restraints question.

  For example: I have a foreign key below

  	"FK_RECONDATA_DRIVER" CONSTRAINT FOREIGN KEY ('NRT', 'DADDRESSTYPE', 'DADDRESSNR')
  	REFERENCES 'COL '. "" TURN ON THE FAZGFUEHRER ' ('NRT', 'ANSCHTYP', 'ANSCHNR'),
  	"FK_RECONDATA_PRODUCT' FOREIGN KEY ('NRT',"PRODUCTNR") CONSTRAINT
  	REFERENCES 'COL '. "" ENABLE SORT "("FNR","SORTENNR")

  Here the column FNR is common in both the foreign key.

  Please help me find how to create indexes on these columns.

  An index defined as ind_fk (a, b, c, e, f) will cover (1) (a) FK and FK (a, b, c).

  It however will not cover FK(a,e,f) because it does not start by all the columns of the FK.

  You must create an additional index that begin with (a, e, f).

  Best regards

  Mohamed Houri

• is it better to use the rowid function or a composite key

  I have a clue about 2 fields so that I can make my form based on these 2 fields
  But now since I spend my app in 4.2 that I intend to do everything depended of rowid function
  
  Is this the right approach
  I currently facing problems as 1422 extract extract several lines even if the primary key is defined as key composite column 2

  Your primary key must never rest on 'natural touches', that is to say the actual data in your table. The fact that you are talking about a composite key means that you think that do. You can create an index that is UNIQUE on these types of fields to maintain the integrity of the data, but they do not have the pharmacokinetics of the table.

  My primary keys are always a NUMERIC field, populated by a combination of sequence/relaxation. Because the data in the ID field have no connection with the data in the table - there is never any need/reason to change. As has been mentioned above, ROWID changes rarely, but it is possible for them. I use ROWID in the Apex and when I have forms to keep tiny (maybe 5-10 lines) lookup tables that are used to populate LOVs create a primary key is excessive.

• CQL Join on the coherence of Cache with Composite key

  I have a coherence of Cache with a composite key, and I want to join a channel for the records that cache with a CQL processor. When I deploy the package that contains the processor, I get the following error:
  
  + italics14:32:35, 938. modify the beginning of query SimpleQuery | [ACTIVE] ExecuteThread: '7' for the queue: "weblogic.kernel.Default (self-adjusting) | CQLServer | FATAL +.
  + 14:32:35, 938. change query > > SimpleQuery < < start +.
  + specified predicate requires a comprehensive analysis of the external source that is not supported. Please change the join predicate. [ACTIVE] ExecuteThread: '7' for the queue: "weblogic.kernel.Default (self-adjusting) | CQLServer | FATAL +.
  
  I think I use the key. If I change the key to a single field, it is OK. I found a similar problem when I defined a Java class to represent the composite key. It is possible to join this way on a composite key cache?
  
  I could define another area that is the concatenation of fields in the composite key, but it's a little messy.
  
  My config is as below:
  
  < wlevs: caching system id = "MyCache" provider = 'coherence' / >
  
  < wlevs:event - type-repository >
  < wlevs:event - type the type name = "SimpleEvent" >
  < wlevs:properties >
  < name wlevs:property = 'field1' type = "char" / >
  < name wlevs:property = 'Field2' type = "char" / >
  < / wlevs:properties >
  < / wlevs:event - type >
  < / wlevs:event - type-repository >
  
  < wlevs: channel id = "InChannel" - type of event = "SimpleEvent" >
  < wlevs:listener ref = "SimpleProcessor" / >
  < / wlevs: channel >
  
  < wlevs:processor id = "SimpleProcessor" >
  < wlevs:listener ref = "OutChannel" / >
  < wlevs:cache - Ref source = "SimpleCache" / >
  < / wlevs:processor >
  
  < wlevs: channel id = "OutChannel" - type of event = "SimpleEvent" >
  < / wlevs: channel >
  
  < wlevs:cache id = value 'SimpleCache"type ="SimpleEvent.
  Properties-key = "Field1, Field2.
  system caching = "MyCache" >
  < / wlevs:cache >
  
  and the processor CQL is as follows:
  
  < processor >
  < name > SimpleProcessor < / name >
  < rules >
  < request id = "SimpleQuery" >
  <! [CDATA]
  Select I.field1, I.field2 from InChannel [now] as I,
  SimpleCache as S where
  I.Field1 = S.field1 and
  I.Field2 = S.field2
  []] > < / query >
  < / rules >
  < / processor >
  
  Thank you
  Mike

  Unfortunately, join him on composite keys in coherence is not supported in the released versions. He will be supported in release 12g.

  As you mention, setting another field as the key, which is the concatenation of the original keys is the workaround.

• Searching on KeyField composite key

  I have a composite key with several KeyFields. I'm not allowed to create SecondaryKey on any KeyField (or better said, I've not found a way to do this). How would a search using the first KeyField? Are there examples? Thank you. Peter

  Hi Peter,.

  This thread answered your question? :

  Re: Help definition index

  No, there is no example of this.

  -mark

• How to assign the WASD keys for arrows (the key mapping)?

  To increase the rate to make source code, it is useful to use WASD rather arrow keys. It is useful for users of right.

  Hello Jiri,

  I recommend you to use external applications for the mapping of the keys.

  An example: http://www.howtogeek.com/howto/windows-vista/map-any-key-to-any-key-on-windows-xp-vista/

  I'm sure you can find many web-based applications that meet your needs,

  Mircea

• How can I disable these very annoying keys mapped to the F keys. I want normal F keys!

  I play a little my surprise (for me) 4 Gig HP Pvillion g6 powerful i3 laptop (W7 64-bit, integrated :() graphics I am more than happy with it.) HOWEVER! There is one thing that finally pushed now a few minutes ago, and it's shortcut keys of STUPID pre mapped keys f. WHY have buttons F have F BUTTONS DON'T WORK? It is causing me a lot of stress in the world of the imaginary game that I often live and we cannot have just that. Rant on (not a real favorite hangover that I promise you! Just a little Catharsis) Please help oh ye enlightened internet folk!

  EDIT: I should have clarified that I mean keys F # but I have faith in your intelligence to help a friend. Overcome my simple ignorance, and bring me the knowledge of the ancients! Can do you so soon? I wan't to play Far Cry 3 without a hitch

  Seems that HP has made these keys just active in them pressed (nowhere did he clear how long this interval is).
  BUT (and now comes the good news), they can be disabled in the BIOS so that they operate strictly as keys 'F' (page 38):
  "An action key performs an assigned function. The icon on each of the f1 through f4 and f6 keys
  by f12 keys shows the function assigned to this key.
  To use a function key to action, press in and hold the key.
  The main feature of the action is enabled in the factory. You can disable this feature in the configuration utility (BIOS).
  See Using Configuration Utility (BIOS) and the system on page 68 Diagnostics for instructions on opening
  Setup Utility (BIOS) and then follow the instructions at the bottom of the screen. »

  Then, after it is disabled in the BIOS, they only work as 'special' according to Mr. Clement keys, pressing the Fn key in combination with her:
  "To enable the function assigned after deactivation of the key feature of the action, you must press the fn key in.
  combination with the appropriate action button. »

  Here is a link to the manual for more information:
  http://h10032.www1.HP.com/CTG/manual/c03271200.PDF>

  If you still have a problem with her due to the proximity of the Fn key, then I believe that you can turn it off completely by stopping HP Quick Launch in the Task Manager. Test it offline before game to ensure that the judgment it does not affect other functions of the keyboard that you need.
  Game on, my friend!

  SC Tom

• composite key

  Hello
  
  can I understand a foreign key column to define a composite primary key?
  for example, Department number is a foreign key in the employee table, then I set number of Department and employee as the primary key of the employee table number?
  
  concerning

  I guess that's still just a sample of what is stored.
  What is the column 'NO '?

  Because a value 'NO' can refer to several 'Boreholenumbers' and a Boreholenumber can refer to several 'NO', you have a number to-several. This should be divided into a 1 to many, and many-to-1 relationship.

  Suppose that 'NO' refers to a boring project number (' excuse the pun) because you have not detailed there.

  I would expect tables like that...

  Table: Boring_Project (BP_NO number, project name varchar2 (30)...)
  Data for example:

  BP_NO Project_Name       ... etc.
  ----- ------------------
  1     Drill for Oil
  2     Dig for Coal
  3     Clangers Moon Dust
  

  Table: Drilling (BH_NO varchar2 (10), Borehole_Name varchar2 (30)...)
  Data for example:

  BH_NO Borehole_Name      ... etc.
  ----- ------------------
  BH1   Borehole 1
  BH2   Borehole 2
  

  Table: Project_Borehole (PBH_NO number, BP_NO number, BH_NO varchar2 (10), varchar2 (10) Field1, Field2 varchar2 (10))
  Data for example:

  PBH_NO BP_NO BH_NO field1 field2
  ------ ----- ----- ------ ------
  1      1     BH1   xyz    pqr
  2      2     BH1   abc    mno
  3      3     BH1   prq    jjq
  4      1     BH2   aqr    xms
  5      2     BH2   xms    nds
  

  So now we have a relationship 1:M between the Boring_Project and Project_Borehole tables.
  We also have a relationship 1:M between drilling and Project_Borehole tables.

  Boring_Project ----- 1:M ----- Project_Borehole ----- M:1 ----- Boreholes
  

  Essentially, this gives you your number to-several between the tables Boring_Project and drilling.
  The Project_Boreholes has its own unique primary key and the BP_NO ('NO' in your case) and BH_NO ('Boreholenumbers' in your case) are two foreign keys.
  Data from the field is linked to a specific combination of 'NO' and 'Boreholenumber' is then that join at the table, but none of these numbers should be the primary key, they should be related to their tables foreign keys "parent". The junction table has its own unique key for every relationship that develops between parents.

  Does that make more sense?

• the movement of the cursor and other keys mapped to the guest operating system

  Host operating system is fedora 10.  Guest operating system is Windows XP Pro.  The arrow of special keys, group of 4 and at home, delete, insert, etc., group of 6 on a typical keyboard on the host computer are not mapped to the guest OS.  Anyone know how this can be corrected?

  Thank you

  Jeepers

  Same problem for me, but I found the solution via google a few weeks ago and I think there's a post on this forum about this as well. But here's my version...

  in your user directory, it must be a directory .vmware.

  Inside this directory must be a file named config, otherwise create it

  in the config file should be a line like this:

  xkeymap.nokeycodeMap = true

  If this isn't there, add it.

  Remotely close sessions and reconnect. Problem solved!

  Other messages on the Internet are talking about doing this on the host machine when running VMware workstation, but it works well enough for the VMware remote console.

  Sure just what do you on the computer that is running the Remote Console and not the host machine, run the virtual machine.

• Problem of composite key chain BigDecimal, pair

  JDeveloper 12.1.3

  I have OS based on a table that has the following PK

  Task_Id NUMBER

  Id_ressource Varchar2 (6)

  Using the EO above, I have a VO to view data in the user interface. I get the problem in the bean to support (test code below)

              DCBindingContainer dcbindings = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
              DCIteratorBinding iterator = dcbindings.findIteratorBinding("TaskCalendarIterator");
              System.out.println(activity.getProvider().getId());
              //Key key = new Key(new Object[] { activity.getId(),activity.getProvider().getId() });
              java.math.BigDecimal key1= new BigDecimal(140080);
              String key2="ds1";
              Key key = new Key(new Object[] { key1,key2 });
              System.out.println(activity.getId());
              System.out.println(key);
              RowSetIterator rsi = iterator.getRowSetIterator();
              Row row = rsi.findByKey(key, 1)[0]; //!!!!!!!!!!!!!!!!!!!!!!!!!!!! Here is where exception is thrown
              rsi.setCurrentRow(row);
  

  Caused by: oracle.jbo.domain.DataCreationException: Houston-25009: failed to create an object of type: java.math.BigDecimal type: java.lang.String with value: ds1

  Recording with the key 140080, ds1 exists in the iterator.

  I thought that the key can be anything, including channels?

  OK, I got the problem solved. The order of the key attributes must be identical to the order of these attributes in the original Version, NOT in OT

  The order was therefore, in my case in OT, TaskId, ResourceId

  Vo to ResourceId, TaskId

  That's why in the bean to support code, it must be:

  java.math.BigDecimal key1= new BigDecimal(140080);  //This is TaskId
  String key2="ds1";  //This is ResourceId
  Key key = new Key(new Object[] { key2,key1 });
  

• Creating aliens/Composite keys (referenced)

  Hello. I have tried to figure this out for a few hours now and thought I'd try posting on a forum before going to bed I now want to rip my hair as I just can't understand it!
  
  Although it will take the masses of space Im going to provide my DB SET here, so that nothing is left out...
  
  Here it is:
  
  
  CREATE TABLE 'COURSES '.
  (NUMBER OF 'COURSE_NO',
  "COURSE_NAME' VARCHAR (30),
  DATE OF THE "COURSE_START_DATE."
  DATE OF THE "COURSE_END_DATE."
  'TOTAL_UNITS' SMALLINT,
  'COURSE_COORDINATOR_STAFF_NO' SMALLINT,
  'TOTAL_COURSE_COST' SMALLINT,
  'THIRD_PARTY_SUPPLIER_NO' SMALLINT,
  PRIMARY KEY ('COURSE_NO') 'COURSE_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'ASSESMENT_TYPE '.
  (VARCHAR (15) 'ASSESMENT_TYPE',)
  VARCHAR (70) "ASSESMENT_DESCRIPTION."
  PRIMARY KEY ('ASSESMENT_TYPE') 'ASSESMENT_TYPE_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'COURSE_OUTCOME '.
  ('COURSE_OUTCOME' VARCHAR (5),)
  VARCHAR (25) "COURSE_OUTCOME_DESCRIPTION."
  PRIMARY KEY ('COURSE_OUTCOME') 'COURSE_OUTCOME_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'DEPARTMENT '.
  ("DEPARTMENT_NO' SMALLINT,
  'DEPARTMENT_NAME' VARCHAR (50),
  VARCHAR (150) "DEPARTMENT_LOCATION."
  ACTIVATE THE 'DEPT_MANAGER_NO' SMALLINT NOT NULL,
  CONSTRAINT PRIMARY KEY ('DEPARTMENT_NO") ENABLE 'DEPARTMENT_PK');
  
  CREATE TABLE 'EDUCATIONAL_INSTITUTION '.
  (VARCHAR (100) 'SCHOOL_UNIVERSITY_NAME',)
  VARCHAR (200) "SCHOOL_UNIVERSITY_ADDRESS."
  PRIMARY KEY ('SCHOOL_UNIVERSITY_NAME') 'EDUCATIONAL_INSTITUTION_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'EMPLOYEE '.
  ("EMPLOYEE_NO' SMALLINT,
  "EMPLOYEE_NAME' VARCHAR (50),
  VARCHAR (150) "EMPLOYEE_ADDRESS."
  'JOB_DESCRIPTION' VARCHAR (50),
  'STATUS' VARCHAR (15).
  'START_DATE' DATE,
  'SALARY_CODE' SMALLINT,
  'SUPERVISOR_EMPLOYEE_NO' SMALLINT,
  "DEPARTMENT_NO' SMALLINT,
  PRIMARY KEY ('EMPLOYEE_NO') 'EMPLOYEE_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'EMPLOYEE_COURSE_OUTCOME '.
  ("EMPLOYEE_NO' SMALLINT,
  'COURSE_NO' SMALLINT,
  'COURSE_OUTCOME_CODE' VARCHAR (5),
  'COURSE_EMPLOYEE_MARK' SMALLINT,
  CONSTRAINT PRIMARY KEY ('EMPLOYEE_NO', 'COURSE_NO') ENABLE 'EMPLOYEE_COURSE_OUTCOME_PK');
  
  CREATE TABLE 'EMPLOYEE_COURSE_UNIT_OUTCOME '.
  ("EMPLOYEE_NO' SMALLINT,
  'COURSE_NO' SMALLINT,
  'UNIT_NO' SMALLINT,
  'UNIT_OUTCOME_CODE' VARCHAR (5),
  'EMPLOYEE_UNIT_MARK' SMALLINT,
  CONSTRAINT PRIMARY KEY ('EMPLOYEE_NO', 'COURSE_NO') ENABLE 'EMPLOYEE_UNITOUTCOME_PK');
  
  CREATE TABLE 'EMPLOYEE_CRS_UNIT_ASSESMENT '.
  ("EMPLOYEE_NO' SMALLINT,
  'COURSE_NO' SMALLINT,
  'UNIT_NO' SMALLINT,
  VARCHAR (15) "ASSESMENT_TYPE."
  'EMPLOYEE_ASSESMENT_MARK' SMALLINT,
  CONSTRAINT PRIMARY KEY ('EMPLOYEE_NO', 'COURSE_NO') ENABLE 'EMPLOYEE_CRS_UNIT_ASSESMENT_PK');
  
  CREATE TABLE 'EMPLOYEE_QUALIFICATION '.
  ("EMPLOYEE_NO' SMALLINT,
  'QUALIFICATION_TYPE' VARCHAR (5),
  'SUBJECT' VARCHAR (20),
  "GRADE" SMALLINT,
  VARCHAR (100) "SCHOOL_UNIVERSITY_NAME."
  'AWARDING_BODY' VARCHAR (50),
  'DATE_QUALIFICATION_OBTAINED' SMALLINT,
  CONSTRAINT PRIMARY KEY ('EMPLOYEE_NO', 'QUALIFICATION_TYPE') ENABLE 'EMPLOYEE_QUALIFICATION_PK');
  
  CREATE TABLE 'QUALIFICATION_TYPE '.
  ('QUALIFICATION_TYPE' VARCHAR (5),)
  VARCHAR (25) "QUALIFICATION_DESCRIPTION."
  PRIMARY KEY ('QUALIFICATION_TYPE') 'QUALIFICATION_TYPE_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'WAGES. "
  ("SALARY_CODE' SMALLINT,
  'SALARY_AMOUNT' SMALLINT,
  PRIMARY KEY ('SALARY_CODE') 'SALARY_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'THIRD_PARTY_SUPPLIER '.
  ("THIRD_PARTY_SUPPLIER_NO' SMALLINT,
  VARCHAR (100) "THIRD_PARTY_NAME."
  VARCHAR (100) "THIRD_PARTY_CONTACT_NAME."
  PRIMARY KEY ('THIRD_PARTY_SUPPLIER_NO') 'THIRD_PARTY_SUPPLIER_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE "UNIT".
  ("UNIT_NO' SMALLINT,
  "UNIT_NAME" VARCHAR (30),
  DECIMAL (7.2) "UNIT_COST"
  PRIMARY KEY ('UNIT_NO') 'UNIT_PK' ENABLE CONSTRAINT);
  
  CREATE TABLE 'UNIT_OUTCOME '.
  ('UNIT_OUTCOME_CODE' VARCHAR (5),)
  VARCHAR (25) "UNIT_OUTCOME_DESCRIPTION."
  PRIMARY KEY ('UNIT_OUTCOME_CODE') 'UNIT_OUTCOME_PK' ENABLE CONSTRAINT);
  
  
  While everything worked fine after that I stuck that in SQL * Plus Command line...
  
  Published by: Ollie_Marriott on April 12, 2011 07:32

  Ollie_Marriott wrote:
  So ive either an hour past and written some absolute crap, or Ive got it right... (In which case ill out spray glue and begin to glue the hair to my head!)

  
  DOES STILL MAKE SENSE?

  Without knowing exactly what you are trying to reach and without uttering an ERD to your drawing, it is difficult to say with certainty, but nothing obviously looks weird. I don't know why you are doing this:

  CREATE TABLE "EMPLOYEE_COURSE_UNIT_OUTCOME" (
     "EMPLOYEE_NO" SMALLINT,
     "COURSE_NO" SMALLINT,
     "UNIT_NO" SMALLINT,
     "UNIT_OUTCOME_CODE" VARCHAR(5),
     "EMPLOYEE_UNIT_MARK" SMALLINT,
     CONSTRAINT "EMPLOYEE_UNITOUTCOME_PK"
        PRIMARY KEY ("EMPLOYEE_NO", "COURSE_NO") ENABLE);
  

  Then later proceed as follows:

  ALTER TABLE EMPLOYEE_COURSE_UNIT_OUTCOME DROP PRIMARY KEY;
  
  ALTER TABLE EMPLOYEE_COURSE_UNIT_OUTCOME
     ADD CONSTRAINT EMCrsOut_PK
     PRIMARY KEY (Employee_No, Course_No, Unit_No);
  

  If you want the three columns of the pharmacokinetics, then put the three columns in the create table statement.

  Assuming that your work is actually done on an Oracle database, and then a few other comments. In general, it is not a good idea in Oracle to use (double) city of identifiers. When you create an object by using quoted identifiers, it becomes potentially sensitive case. By default, Oracle stores the object in uppercase letters names in the data dictionary and transform an identifier without quotes uppercase before looking in the data dictionary. Although all identifiers in double quotes appear to be capital letters, a slight typo in your creation scripts could cuase hours of frustration in the future. Take into account:

  SQL> CREATE TABLE "MY_tEST_TAB" (
    2     "ID" NUMBER,
    3     "DESCr" VARCHAR2(10));
  
  Table created.
  
  SQL> desc my_test_tab
  ERROR:
  ORA-04043: object my_test_tab does not exist
  
  SQL> desc "MY_tEST_TAB"
   Name                                      Null?    Type
   ----------------------------------------- -------- ----------------------------
   ID                                                 NUMBER
   DESCr                                              VARCHAR2(10)
  

  compared to

  SQL> drop TABLE "MY_tEST_TAB" purge;
  
  Table dropped.
  
  SQL> CREATE TABLE my_test_tab (
    2     id NUMBER,
    3     descr VARCHAR2(10));
  
  Table created.
  
  SQL> desc my_test_tab
   Name                                      Null?    Type
   ----------------------------------------- -------- ----------------------------
   ID                                                 NUMBER
   DESCR                                              VARCHAR2(10)
  
  SQL> desc MY_tEST_TAB
   Name                                      Null?    Type
   ----------------------------------------- -------- ----------------------------
   ID                                                 NUMBER
   DESCR                                              VARCHAR2(10)
  

  Your data types seem to be that the base SQL Server, that's why I said assuming that Oracle above. In Oracle, the correct data type for a variable-length string is a VARCHAR2, not a varchar. Currently, these are the same, but Oracle has always said that the semantics of varchar may change.

  Smallint is a type of data accepted in Oracle, but it translates into Number (38) in Oracle. Similarly, your definition of decimal (7, 2) is translated to a NUMBER (7.2) in Oracle.

  Of course, if your work is actually in SQL server, then ignore the last half of this and find the SQL Server on MSDN forums :-) Oracle and SQL Server behave very differently, and what works well in Oracle may not in SQL server (and vice versa), so all of the advice you get here for a SQL Server problem may or may not be valid.

  John

• foreign key mapped to a unique constraint

  OK, here's the question
  
  create a parent of the table (col1, col2 char char);
  alter table add constraint pk_parent key (col1) parent primary;
  alter table add constraint uk_parent unique(col1,col2) parent;
  
  Insert into parent values ('A', '7');
  
  * 1 row created.*
  
  create the child table (col1, col2 char char);
  ALTER table child add constraint fk_child_parent foreign key(col1,col2) references parent(col1,col2);
  
  insert into values('B','4') of the child;
  
  insert into the child values('B','4')
  ***
  ERROR on line 1:
  ORA-02291: integrity constraint (WILDGOD. FK_CHILD_PARENT) violated - parent key
  not found
  
  That's what I expect... but
  
  insert into values('B',) of the child;
  
  * 1 row created.*
  
  
  why he let me do, I realize its because col2 is NULL, but it should not yet check for col1 in the parent?
  
  Please clarify, thanks in advance.

  Documented behavior.

  See here:
  http://download.Oracle.com/docs/CD/E11882_01/AppDev.112/e10471/adfns_constraints.htm#ADFNS273

  -Mark