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

Tags: Database

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~~~~~~~~~~~~~~~~~~~~~~~~~~

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-See sysinfo below for more details

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2014-11-15 19:25:08:807 3488 1 b 84 Misc = logging initialized (build: 7.8.9200.17099, tz:-0500) =.
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identity of 2014-11-15 session 19:25:08:807 3488 1 b 84 CBS Handler: 30409011_3339369637
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2014-11-15 19:25:18:385 880 1a7c report CWERReporter::HandleEvents - WER report upload completed with status 0 x 8
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https://onedrive.live.com/embed?CID=F6521FC0B4D999D4&RESID=F6521FC0B4D999D4%21152&AuthKey=AH4VBaqSBjRn6lU"width ="320"height ="272"frameborder ="0"scrolling ="no">

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ACTIONS

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Good luck!

===========================================================
[1] source: page http://iefaq.info/index.php?action=artikel&cat=42&id=133&artlang=en of my colleague IE MVP Kai Schatzl

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I have 2 tables,

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```
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```
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```
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```
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```
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[/code  

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```
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Thank you
Kind regards
gurujothi

Edited by: Gurujothi may 1, 2012 19:54
It is generally considered bad practice to store the value even in 2 places. You are having the kind of problems that you are experiencing now. It is much easier to store in the main table and get the value from there where you need to show in your forms.

How to write the trigger for update or delete multiple columns in a table?

Hello

I create one in the form of table of sample_emp. In that, every time I want to change of name, team_id, team_leader_id, supervisor_id, manager_id it must store the update-able and old values of those in the job_history table. When I write the trigger for which it shows "ORA-04082 new or the old value not table level triggers. Here is my emp_table. My table also similar job_history like this. Need your help.

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Thank you.

Hi Joel,.

Venky_prs wrote:

Hello

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Hope this helps you,

Kind regards

Jitendra

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Windows Update error 80070490

If you receive the Windows Update 80070490 error, it means that a file (CBS Manifest) that is needed to install updates is corrupt. To correct this problem, you will need to repairWindows. RepairingWindows will not damage your personal files or the programs that are installed on your computer.

The System Update Readiness Tool for Windows can correct some conditions that causeWindows Update error 80070490. You can access and run this tool by reading this http://support.microsoft.com/kb/947821 on the Microsoft Web site.

If the system update readiness tool solves the problem, you need to repairWindows. RepairingWindows will not damage your personal files or the programs that are installed on your computer.

Once you have completed the repair, you will need to restart Windows Update to install updates are not included on the installation DVD. RepairWindows, follow these steps:
1. Close all programs and restart your computer.
2. Insert the DVD into your disc drive. Wait for the installer to start. If the installation program does not start automatically, follow these steps:
  1. Click on start and type Drive: \setup.exe in the search box. ReplaceDrive with the letter of the DVD drive of your computer (for example, D:\setup.exe).
  2. List programs, click Setup.exe.
3. Click on install now.
4. Click go online to get the latest updates for installation (recommended).
5. If you are prompted to do this, type the Windows product key.
6. What type of installation you want? window, click upgrade.
7. Once the installation is complete, restart your computer, and then run Windows Update.
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