Why is the release of the trigger on all fields in a table?

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• trigger for update field in a table with the sum of the fields to another table

  My experience in creation of triggers and pl/sql in general can be described in terms of oracle with the null value. I practiced by creating arrays and applications on my personal server at home to help me with some of my work related tasks. Right now I am creating a trigger which will, after insert, update, delete on the update of the table assignment_time_track the area of the time_spent on the table of assignments with the sum of the time_spent on the assignment_time_track table fields. I hope that run on the sentence it is clear to the people other than me. I tried this script on my own using the tool of creation of trigger for Oracle Database Express Edition, but I get the following error:
  
  Create a trigger failed, for the following reason:
  ORA-06552: PL/SQL: ORA-06553 finished Compilation unit analysis: PLS-320: the declaration of the type of the expression is incomplete or incorrect
  
  Here is my attempt to create the trigger on my own.
  
  create or replace trigger "ASSIGNMENT_TIME_TRACK_T1".
  AFTER
  INSERT or update or delete on 'ASSIGNMENT_TIME_TRACK '.
  for each line
  Start
  update assignments
  Set time_spent = (select sum (time_spent)
  of assignment_time_track
  where assignment_time_track.name = assignments.name);
  
  end;
  /
  
  
  If what I posted is not clear or more detail is needed, let me know and I will respond with a full description of tables and my goals for each table. Thanks in advance for any help. I also gladly accepts links to tutorials or lessons that explain how to do this kind of thing.
  
  Published by: bobonthenet on March 9, 2009 14:01

  I think I understand what you mean :)

  Rather than use a trigger to keep the master table (assignments) in sync with the time spent on the details, it would be much easier to use a query to do this, maybe creating a view.

  Something along the lines of

  SQL> create table assignments
    2  (id number primary key
    3  ,name varchar2(10)
    4  );
  
  Table created.
  
  SQL>
  SQL> create table assignment_time_tbl
    2  (id number primary key
    3  ,assid number references assignments
    4  ,time_spent number
    5  );
  
  Table created.
  
  SQL>
  SQL> insert into assignments
    2  select rownum
    3       , 'a'
    4    from all_objects
    5   where rownum < 5
    6  /
  
  4 rows created.
  
  SQL>
  SQL> insert into assignment_time_tbl
    2  select rownum
    3       , rownum
    4       , rownum * 3
    5    from all_objects
    6   where rownum < 5
    7  /
  
  4 rows created.
  
  SQL>
  SQL> commit;
  
  Commit complete.
  
  SQL>
  SQL>
  SQL> select a.id
    2       , a.name
    3       , (select sum (time_spent)
    4            from assignment_time_tbl
    5           where assid = a.id
    6         )
    7    from assignments a
    8  /
  
          ID NAME       (SELECTSUM(TIME_SPENT)FROMASSIGNMENT_TIME_TBLWHEREASSID=A.ID)
  ---------- ---------- -------------------------------------------------------------
           1 a                                                                      3
           2 a                                                                      6
           3 a                                                                      9
           4 a                                                                     12
  

• Why is the window display all bookmarks empty even though I still see my favorites in Firefox > bookmarks?

  The window display all bookmarks and bookmark side are empty, even though my booksmarks are always accessible from the Firebox menu > bookmarks. Unfortunately, I can't manage my favorites through this option. How can I fix the windows display all bookmarks and Favorites aside to display my favorites?

  One possible cause is a problem with the places.sqlite file that stores the bookmarks and history.

  • http://KB.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox

• remove the dishes and all references in other table

  Hello
  I want to delete some entries in table1 and all references of this dishes of resistance to other table
  Take as an example
  Table1 (Att1, attr2) attr2 value reference table2(att1-1,att1-2), with the constraint attr2 = att1-1
  I want to know how to do with delete from table1...
  
  Concerning
  ELYES

  One option is to use the trigger.

  Kind regards.

  LOULOU.

• Check if all the instances of a field in a table are empty?

  I'm having a problem with the control if all instances of a field in a table are empty. If one is empty I need a message box appears. There is a header line and a line of body with several text fields. The line of the body is set to repeat itself and there are buttons to add and remove lines of the body.

  I had success by checking if all fields are blank in the original line by using the following code:

  if ((this.resolveNode("Page1.Table1.Row3.TextField1").rawValue == null | )) this.resolveNode("Page1.Table1.Row3.TextField1").rawValue == "") || (this.resolveNode("Page1.Table1.Row3.TextField2").rawValue == null | ) this.resolveNode("Page1.Table1.Row3.TextField2").rawValue == "") || (this.resolveNode("Page1.Table1.Row3.TextField3").rawValue == null | ) this.resolveNode("Page1.Table1.Row3.TextField3").rawValue == "") || (this.resolveNode("Page1.Table1.Row3.TextField4").rawValue == null | ) this.resolveNode("Page1.Table1.Row3.TextField4").rawValue == ""))

  {xfa.host.messageBox ("Please complete the table of assessment/implementation." )} , 'Incomplete form' , 1);}

  I guess that in all cases be verified that I have to use the 'resolveNodes' function but I could not make it work. That's what I tried:

  if (( == this.resolveNodes("Page1.Table1.Row3.TextField1").rawValue null | )) this.resolveNodes("Page1.Table1.Row3.TextField1").rawValue == "") || .........)

  Although it works not since .rawValue isn't a function that work with resolveNodes (only resolveNode).

  Should what code I use for this?

  Thanks in advance for any advice.

  Hello

  To be able to check each field in a multiple instances of a table line, you must specify which line you are trying to access to...

  To do this, you must specify the index of the row, this way you can treat each rows in a loop and access each field within this line

  Instead of using resolveNodes, I suggest you use resolveNode... and it should look like this:

  for (var i = 0; i)< page1.table1._row3.count;="">

  If (this.resolveNode ("Page1.Table1.Row3 [" + I.ToString + "]").) TextField1.rawValue == null | this.resolveNode ("Page1.Table1.Row3 [" + I.ToString + "]"). TextField2.rawValue | .......) {

  xfa.host.messageBox ("Please complete the table of assessment/implementation.", "incomplete form", 1);

  break;

  }

  }

  I hope this helps!

• Why my "Reset form" button didn't reset all fields?

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• Why is the trigger of the DAQ signal works not as I expect?

  Using the DAQ Assistant, I have received a signal at a rate of 100 k Hz and number of samples of 75 k. I would like a light every time that the amplitude of the signal falls below 1. As you can see from my attached graph, the amplitude becomes less than 1. However, the light does not turn. Any suggestions on what I'm doing wrong or misunderstanding, that I might have? This is my first project with the DAQ Assistant, then perhaps there is something simple that I'm missing.

  Hello

  The problem in your VI is that you gain 75 k samples, but you check if the second sample is less than 1V.

  This is because the Index Array node, it will give you only a single element of the array, which means a single sample.

  You should take just a sample at a time, or send the table going into a tunnel of indexing. But that could slow things down when you have so many samples.

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• Why firefox did ask to make changes to my computer whenever I open the browser. Why is the screen pixelated all?

  When click on firefox on my desktop that a message appears to ask me if I will allow firefox to make changes to my computer. It happens every time. each page is also all pixelated and barely visible. the Explorer IS NOT to do THIS.

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• Why is the contents of a field to fill in missing?

  I enter data into the fields to fill and save the document in pdf format. I sent it to someone who opens with an iPhone or iPad and the content of the field is not visible.

  Hello

  Did you send your form as an attachment to e-mail?

  It is highly unlikely that the e-mail recipient opened your PDF form in Apple Mail on an iPhone or an iPad.

  Please note that overview of Apple Mail doesn't show data form or annotations (Sticky Notes, highlighting, Freehand, drawing, etc.) in a PDF document.  This is the limit in Apple Mail, iBooks, and Safari.

  You can request the email recipient to install Adobe Reader for iOS and use the function "open" to open it in Adobe Reader.

  Please take a look at the section of the FAQ documents for instructions on how to use 'open '.

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• the selection of all colomns_names of a table, with their data types...

  HI :)
  
  I would like to know, how to select in SQL for all the names of columns in a table with their data types so that I get something like this:
  
  Table 1: table_name
  
  the ID of the column has the NUMBER data type
  the name of the column has Datatype Varchar2
  *....*
  
  --------------------------------------------------------------
  
  Table 2: table_name
  
  the check in the column has the NUMBER data type
  the air of the column has Datatype Varchar2
  *....*
  
  
  and it must be for all the tables that I own!...
  
  P. S: I'm trying to do this with java, so it s would be enough if you just tell me how to select all tables_names with all their colums_names and all their data types!...
  
  Thanks :)
  
  
  
  I've heard this can be done with USER_TABLES... but I have no idea how: (...)
  
  Edited by: user8865125 the 17.05.2011 12:22

  Hello

  USER_TAB_COLUMNS data dictionary view has a row for each column of each table in your schema. The columns TABLE_NAME, COLUMN_NAME and DATA_TYPE contains all the information you need.
  Another view of data, USER_TABLES dictionary, can be useful, too. He has a line of table pre.

• With the exception of all columns in a Table?

  Is there a way to do this? Basically, I want between 0 and 9 columns in a table, but most of the time most of the columns will have no data in all. I need to completely exclude these columns in the model, is it possible to do this using conditional formatting (or something else) somehow?

  Use if@column
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  Thank you!

  Hello

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• Why control statements such a ROLLBACK or COMMIT of the Transaction are not written in the trigger?

  
  Hello world

  Why the ROLLBACK statement or COMMIT are not allowed in the trigger? and if I then use this problem may happen?

  IndiMinds wrote:

  Hello world

  Why the ROLLBACK statement or COMMIT are not allowed in the trigger? and if I then use this problem may happen?

  Because a trigger is NOT a transaction. This is a SINGLE STATEMENT, which is part of another transaction.

  What is the problem? Well, if the trigger does not use the pragma AUTONOMOUS_TRANSACTION to the 'problem' that occurs is an Oracle exception, since you cannot use commit or rollback in the standard triggers.

  If a trigger contained a VALIDATION you wouldn't be able to write a transaction that contained multiple measures correctly.

  What happens if you insert rows in multiple tables and you want to perform a COMMIT ONLY if all three insertions succeed?

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  What do you want to learn more about?

• trigger error autnomous mutation! Why not allow select in the trigger body?

  case 1. a user updates the table and this user has not committed, even fire user select request, he would get an old result. but no error.
  
  case 2. We have table x, trigger appears on the table x as soon as the table is updated to trigger fires. inside the body that we select just for table 'x' it throws error error changing table
  can someone please explain why?
  
  my example as follows:
  case 1:
  CREATE TABLE MyTable
  (NUMBER of c1);
  
  INSERT INTO myTable VALUES (1);
  commit;
  INSERT INTO myTable VALUES (2);
  
  Select * from myTable;
  C1
  ------------
  1
  
  
  
  
  case 2:
  CREATE TABLE myMaxTable
  (maxValue NUMBER);
  
  CREATE TABLE MyTable
  (NUMBER of c1);
  
  INSERT INTO myMaxTable VALUES (NULL);
  COMMIT;
  
  CREATE OR REPLACE TRIGGER myTrigger
  AFTER ON INSERT myTable
  FOR EACH LINE
  BEGIN
  UPDATE myMaxTable
  SET maxValue = (SELECT MAX (c1) FROM MaTable);
  END;
  /
  INSERT INTO myTable VALUES (1);
  
  INSERT INTO myTable VALUES (1)
  *
  ERROR on line 1:
  ORA-04091: table HUNBUG. MYTABLE is changing, function of triggering/can not see
  ORA-06512: at "HUNBUG. MON_TRIGGER', line 2
  ORA-04088: error during execution of trigger ' HUNBUG. MYTRIGGER'

  Assume that you are doing something like this:
  You have three records in the table:

  INSERT INTO myTable VALUES (1);
  
  INSERT INTO myTable VALUES (2);
  
  INSERT INTO myTable VALUES (3);
  

  Then do you one insert call to do more than three:

  INSERT INTO myTable
  SELECT c1 + 100
  FROM myTable;
  

  This last call insert inserts 3 records in your table - 101, 102 and 103.

  When you have a trigger FOR EACH ROW, which will be called three times, but there is no way to predict in what order, and when the trigger will fire for example at c1 = 102, the table is the "mutation" - it is located in the heart of a change and you don't know if 101 or 103 or both is in the table. Oracle does not allow you to do a select on the table of this mutation.

  When you remove the FOR EACH ROW clause, the trigger only will be called once at the end of this call to insert, moment in which the table is no longer changing and so your code will be located safely c1 max.