Parsing sql - cursor parent and child

Similar Questions

• Cursors for parent and child, bind variable and library cache

  I was going through the documentation to understand the difference between the parent and the child cursors. Surprisingly, there's not too much help for this. I was able to collect the following information about this
  
  For each statement SQL cache library contains a cursor "parent" for the text of the SQL statement. The parent cursor is composed of a "handle" that can be searched by the hash value via the library cache hash table and an «object' which contains pointers to each of its «child» cursors Each cursor of the child is also composed of a handle and an object. The child object is composed of two segments numbered from 0 to 6. Lot 0 contains all the credentials for a particular version of the SQL statement and lot 6 contains the execution plan. This distinction between parent and child cursors is maintained even when there is only one version of each SQL statement.
  
  Lets say that 2 LMD were fired with the same set of variables bind (names of variables were same but differed from the value.) The only difference between the 2 LMD was the value of the variable binding) and under the same conditions of load.
  
  These DML 2 would be a sliders 2 children of one parent only cursors.
  
  Please tell me detailed documentation on the subject, so my question is too elementary
  
  Kind regards
  Vishal

  I'm not sure how useful jumping in stuff like bunch 0 and 6 bunch is in terms of understanding what is a parent and what is a child cursor.
  This quote seems to come from Steve Adams - http://www.ixora.com.au/q+a/0104/19005414.htm
  It's a good idea to cite your references.

  I'll give it a go.

  A cursor is a lot of information stored in memory on a SQL statement.

  The basic information for a parent cursor is the text of the SQL statement - exact matches of the statement can only share the parent cursor.

  The cursor of the child is really on the implementation plan specific for a statement and the different settings and parameters that caused this plan to be generated.

  There are a whole bunch of reasons why the executions of the same SQL statement may or may not reuse the existing child cursors.

  In your example 2 statements that differ by the variable binding are likely to lead to different children, although there are factors that can lead to lie different values, do not share the same children among whom for example, the length of the dregs, Adaptive setting cursor_sharing = similar and histograms, or new features like cursor sharing (on subsequent runs of renowned sql running suboptimal initially).

  It might be useful to see V$ SQL_SHARED_CURSOR. This shows the disparities that cause children to not be shared. There are more than 60 columns in this view which gives an indication of the number of factors that can influence.
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e17110/dynviews_3059.htm#REFRN30254

  You might want to look here the criteria for sharing SQL:
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e16638/memory.htm#i40017

  Away from the main documentation, perhaps some of the writings of the optimizer Development Group could help?
  http://blogs.Oracle.com/mt/mt-search.cgi?blog_id=3361&tag=cursor%20sharing&limit=20

  Christian Antognini described this area very well in the "Oracle Performance Troubleshooting Guide".

  Published by: Dom Brooks on February 24, 2011 16:45

• How is a parent and child, rights and roll determind in the script

  How is a parent and child, rights and roll determind in the script as an exe of java or xml. It's first and second user and which assings these rolls? thanx

  Hello

  Thanks for posting your question in the Microsoft Community.

  Sinc you want to determine the parent and the child rights usings script as an exe of java or xml, the question you posted would be best suited in the MSDN Forums. I would recommend posting your query in the MSDN Forums for further assistance:

  MSDN forums

• Why Developer SQL displays arrows (relations) between parent and child tables in my entity relationship diagram?

  Hello

  
  

  Oracle version:                     Oracle Database 11 g Release 11.1.0.7.0 - 64 bit Production

  The version of SQL Developer: 4.0.2.15 - 15.21 build

  I have a question about drawing diagram, entity-relationship with SQL Developer & I would be grateful if you could kindly give me a helping hand.

  I would like to draw an entity-relationship diagram in order to better visualize the relationship between multiple tables. After a google search, I found the following interesting article indicating the procedure to be followed:

  http://www.Oracle.com/technetwork/issue-archive/2014/14-may/o34sqldev-2193423.html

  (What I need and I'm trying to produce is Figure 4 in the article above)

  I made exactly as stated in the article & apparently everything has worked well enough, in other words, I had several UML as rectangles showing columns of tables, their data types, primary and
  foreign key and the arrows indicating the link between each parent/child table.

  Later, I tried to do the same thing on a different oracle instance and a different database by using the same procedure. Yet, something strange happened this time. Developer SQL printed on-screen tables, once again,.
  inside the rectangles with types, keys,... but, there was no arrow showing the link between the tables, I just saw on the grid the selected tables but without any association/relationship shown (as a symbol of an arrow)
  between them.

  I repeated the procedure on another instance of development, with a few test tables that I created with primary and foreign keys just to make sure I had followed the procedure correctly. Once again

  the test was successful, but when I repeated the test on another instance, the same problem persisted, in other words, no arrow (relationship) between tables.

  Any idea?

  This could be due to a lack of privilege on the instance? If Yes, what should be granted in what about roles?

  Thanks in advance

  I think that what you see is that not all databases have foreign keys - applications hard-coding relationships vs let the database to handle this.

  Connect to this instance different oracle and browse the tables affected - have FK constraints defined on them?

• composite unique constraint on the values of parent and child?

  Is it possible to have a composite unique constraint that contains the values of the child elements? The example below has the "child" elements are offline, but it's preferred, but optional, I know that you can have a unique constraint in the set of tables without using a reference table that contains the constraint and the two columns. How xdb manages this requirement?
  
  permit:

  <parent ID="1">
     <child><name>test1</name></child>
     <child><name>test2</name></child>
  </parent>
  <parent ID="2">
     <child><name>test1</name></child>
     <child><name>test2</name></child>
  </parent>

  not allowed:

  <parent ID="1">
     <child><name>test1</name></child>
     <child><name>test1</name></child>
  </parent>

  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
             xmlns:xdb="http://xmlns.oracle.com/xdb"
             xdb:storeVarrayAsTable="true"
             elementFormDefault="qualified">
      
      <xs:element name="parent" type="Parent_T"
          xdb:columnProps="CONSTRAINT parent_pkey PRIMARY KEY (XMLDATA.ID)"
          xdb:defaultTable="PARENT"/>
  
      <xs:complexType name="Parent_T" xdb:SQLType="PARENT_T" xdb:maintainDOM="false">
          <xs:sequence>
              <xs:element name="child" type="Child_T" minOccurs="1" maxOccurs="unbounded" xdb:SQLName="CHILD"
                        xdb:SQLInline="false" xdb:defaultTable="CHILD" "/>
          </xs:sequence>
          <xs:attribute name="ID" xdb:SQLName="ID" use="required" />
      </xs:complexType>
      
      <xs:complexType name="Child_T" xdb:SQLType="CHILD_T">
         <xs:sequence>
           <xs:element name="name" type="xs:string" xdb:SQLName="NAME"/>
         </xs:sequence>
       </xs:complexType>     
  </xs:schema>

  xdb:columnProps = "CONSTRAINT parent_pkey PRIMARY KEY (XMLDATA.ID), * UNIQUE (XMLDATA.» "Child.Name) *" triggers the non-existent attribute
  
  
  A possible solution would be to copy the value of the primary key parent of the child element, then I could create a composite unique constraint using only the values of the child. However, I have this same requirement elsewhere in my lowest nested schema, and it can become messy / bad design with cascading of all primary keys on the schema. For example, I have a recursive element in which two attributes must be unique only within the parent company:

  <parent id="1">
     <child a="1" b="1">
        <child a="1" b="2">
           <child a="1" b="1" /> *not allowed
        </child>
     </child>
     <child a="1" b="2" /> *not allowed
  </parent>

  Possible solution:

  <child a="1" b="2" parent_id="1" />
  <xs:complexType name="Child_T>
     <xs:sequence>
        <xs:element name="child" xsd:SQLInline="false" xsd:columnProps="UNIQUE(XMLDATA.a,XMLDATA.b,XMLDATA.parent_id)" minOccurs="0" maxOccurs="unbounded" type="Child_T">
     </xs:sequence>
     </xs:element
  </xs:complexType>

  Is there a better design?
  
  

  Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi 
  PL/SQL Release 10.2.0.4.0 - Production                           
  CORE     10.2.0.4.0     Production                                       
  TNS for Linux: Version 10.2.0.4.0 - Production                   
  NLSRTL Version 10.2.0.4.0 - Production 

  You can do something like this:

  SQL> DECLARE
    2
    3    xsd_doc xmltype := xmltype('
    4  
    5    
    6      
    7        
    8          
    9        
   10      
   11    
   12    
   13      
   14        
   15          
   16        
   17      
   18    
   19    
   20      
   21        
   22          
   23        
   24        
   25      
   26    
   27    
   28      
   29        
   30          
   31        
   32      
   33    
   34  ');
   35
   36  BEGIN
   37
   38    dbms_xmlschema.registerSchema(
   39      schemaURL => 'test_parent.xsd',
   40      schemaDoc => xsd_doc,
   41      local => true,
   42      genTypes => true,
   43      genbean => false,
   44      genTables => false,
   45      enableHierarchy => dbms_xmlschema.ENABLE_HIERARCHY_NONE
   46    );
   47
   48  END;
   49  /
  
  PL/SQL procedure successfully completed
  
  SQL> CREATE TABLE my_xml_table OF XMLTYPE
    2  XMLTYPE STORE AS OBJECT RELATIONAL
    3  XMLSCHEMA "test_parent.xsd"
    4  ELEMENT "root"
    5  VARRAY xmldata."parent" STORE AS TABLE my_parent_tab
    6  (
    7    VARRAY "child" STORE AS TABLE my_child_tab
    8  )
    9  ;
  
  Table created
  
  SQL> ALTER TABLE my_parent_tab ADD CONSTRAINT parent_uk UNIQUE (nested_table_id, "ID");
  
  Table altered
  
  SQL> ALTER TABLE my_child_tab ADD CONSTRAINT child_uk UNIQUE (nested_table_id, "name");
  
  Table altered
   
  

  Then:

  SQL> insert into my_xml_table values (
    2  xmltype('
    3     test1
    4     test2
    5  
    6  
    7     test1
    8     test2
    9  ')
   10  );
  insert into my_xml_table values (
  *
  ERREUR à la ligne 1 :
  ORA-00001: violation de contrainte unique (DEV.PARENT_UK)
  
  SQL> insert into my_xml_table values (
    2  xmltype('
    3     test1
    4     test1
    5  
    6  
    7     test1
    8     test2
    9  ')
   10  );
  insert into my_xml_table values (
  *
  ERREUR à la ligne 1 :
  ORA-00001: violation de contrainte unique (DEV.CHILD_UK)
  
  SQL> insert into my_xml_table values (
    2  xmltype('
    3     test1
    4     test2
    5  
    6  
    7     test1
    8     test2
    9  ')
   10  );
  
  1 ligne créée.
  

  http://download.Oracle.com/docs/CD/B19306_01/AppDev.102/b14259/xdb06stt.htm#sthref987

• How to separate af:train Train of Parent and child Train

  Dear experts,

  I need to create a form wizard with train and train the child parent. The request is to make parents to train the train left and a child in the middle. The train of the child in the course of parent is hidden.

  Do you have any suggestions?

  The example that I built.

  

  The requirement.

  

  Kind regards

  Ricky

  Hello

  Also check link below. I try to apply it. I think it's possible. I will update. Update your version of Jdevloper.

  http://www.Oracle.com/technetwork/developer-tools/ADF/learnmore/externaltrainnavigationpattern-1845645.PDF

  Thank you

  Amey

• Question packets parent and child

  Hello

  Greetings!

  I have a Parent package and a child package that have around 20 packs inside.

  When I run the parent package and a child, the parent package runs in a few seconds, but the 20 jobs in child packages takes 1 hour of time to execute.

  In operator, it is the final parent package watch while the child packages takes time to complete. Have first child packages must complete and Parent packets after that.

  No idea why this happening.we also by controlling refreshing but his does not work.

  Thank you

  Lony

  If you call asynchronously a child/scenario package then it will return control to its parent immediately, what is the nature of asynchronous operations and you to have several processes running in parallel. If you don't want the Parent to complete its execution until all her children are processing you have 2 options:

  (1) not to call asynchronously the child, if you do not have many children parallel execution is the usual approach

  (2) However, if you have several children, parallel execution, make use of the odiwaitforchildsesion tool. You use once at the beginning of the sequence run in parallel and once at the end and this will ensure that your parent package will wait for all asynchronous operations to complete before continue. This link gives a good overview of how to implement asynchronous - parallel execution - ODIExperts.com

• Parent and child Tabs - reactive theme blue 25

  Hello

  I am trying to consolidate some tabs in a TAB of the Parent, but may not know how to do this.

  This is the game of the tab that I currently have, but I plugged and category fall under the company.

  

  

  Please someone can help me achieve this goal. I tried to add a new TAB Parent game, but I can't seem to link the tabs of the child to the Parent new I create.

  
  

  A little confused with the installation of these tabs...

  
  

  Thanks in advance

  
  

  
  

  Maguzzi wrote:

  I am trying to consolidate some tabs in a TAB of the Parent, but may not know how to do this.

  This is the game of the tab that I currently have, but I plugged and category fall under the company.

  

  

  Please someone can help me achieve this goal. I tried to add a new TAB Parent game, but I can't seem to link the tabs of the child to the Parent new I create.

  A little confused with the installation of these tabs...

  You and everyone else. Tabs are not the best feature of the APEX, and I feel are fairly close to obsolescence in APEX 5.0...

  You want to do is add tabs as descendants of the standard tabs, which is not possible. To achieve the branch and the tabs under the company category, you must convert all of the existing tabs to a parent tab set and add the standard tab sets for each parent tab. I don't think that's actually what you want or require, that looks more like a listof hierarchical. Suggest you only replace using the tabs with a list by using the Pull Down Menu of navigation list template.

• Parent and child pages in outline view

  Is it possible to connect 2 pages of parent in the same page of the child when the implementation of a sitemap in outline view?

  Although we can't demonstrate visually, what can be done, technically.

  Creating the navigation menu by manually changing the elements and links.

• Problems with the Parent and child Pages...

  I created a parent page with several pages of the child, but when I transferred to my host FTP pages do not come to the top in the hierarchy in the URL bar. I want it to be "www.website.com/parent/child.html" but they come as 'www.website.com/child.html '.

  How can I change this? I thought that by creating a page parent to the child which would automatically when loading pages. Help, please!

  Thank you!!!

  Muse currently publishes all the pages in the root directory of the Web server. It does not create a folder structure based on the structure of the site defined in Plan view. The structure of the site defined in the Plan view is used by the Widget Menu to generate Menus correspondents and submenu entries.

  Hope that specified in the query.

  See you soon,.

  Vikas

• How to delete records parent and child together?

  Hello
  
  I use Jdeveloper 11.1.2.2
  I want to delete a row in a table, but it is to show:

   Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-02292: integrity constraint (TABLE1_TL_FK1) violated - child record found.

  So, how can I remove a child line and the line of the table in a method?
  
  I can't access the child VO because it is not added to the AM.
  
  Thank you
  
  Nigel.

  http://docs.Oracle.com/CD/E26098_01/Web.1112/e16182/bcentities.htm#BABHFJFJ

• Delete records parent and child

  Hi all, hope you can help. I was wondering what the most effective method is to do this:
  
  There are 3 tables involved.
  
  TBL_APPLICATION (appl_no (PK))
  TBL_ROOM (appl_no (FK))
  TBL_ROOM_MATE (appl_no (FK))
  
  TBL_APPLICATION is the main table and has a 1 to many times TBL_ROOM & TBL_ROOM_MATE relationship.
  
  
  I have 80 files or that I need to remove TBL_APPLICATION and atomically delete their child references in the TBL_ROOM & TBL_ROOM_MATE as well.
  
  I looked at a procedure that allows you to select each app_no and removes references to the child first and then countering to TBL_APPLICATION.
  
  Some tips and examples would be much appreciated, as it is important I don't mess this place and I want to keep each atomic transaction incase something breaks down. : D
  
  Thank you very much

  oraCraft wrote:
  Arrays do not have the Delete Cascade game, nor can I change the table. So I can't use it. I will implement the procedure.

  Tubby if I had to create a cursor and loops on each App_no running the three remove commands, is completely Atomic? as he used complete unless all orders delete three are made to the database. ? Also will I commit in the loop or outside it?

  Do not use a loop, all that will do is to add massive amounts of overhead to the procedure.

  Perform deletions as I pointed out, this is your best bet.

  Regarding the commitment, which is really for you. Generally, you should not be committed in your routines, that should be the responsibility of the calling application so that it can determine the transaction limits.

  If you have added a validation of the code, you would add a commit only after the statement of final deletion, which would preserve the integrity of the transaction in this procedure, but again, adding a commit procedure means you have mandated that a transaction includes, who can not fly with applications by calling the procedure.

• How to access the methods of the / in the parent and child responsible sovereign wealth funds?

  Hello world

  Imagine the following configuration. The main SWF load a child swf file.

  In AS2, I would use just _parent or _root to call the desired function. How can be done in AS3?

  Is it still possible? Can I call a function on the main swf that loaded? What happened the other way around, this time of principal to the loaded swf format?

  Thanks for the support!

  See you soon

  :::-)

  In AS3, you can call the _parent (AS2) using MovieClip (parent) (AS3) and similar to the _root.  If you load a child swf, you must understand that the child normally lives in the charger you loaded with, so to return to the loaded swf file you have to go (parent.parent) MovieClip.

  So much to talk to the child going to swf, go through the following discussion...  http://forums.Adobe.com/thread/720211?TSTART=0

• Parental and child control with AS3

  Hello

  I am new to AS3 and although I can see some good practices and functionality, I'm constantly stuck and can still do the things I would do if easily with AS2 - I almost it relearn from scratch!. I would still appreciate little help and advice on this...

  I did a class that creates a "sort" menu with data from an XML file, and basically is what he does when he is called to create an emptyMC (a container), add a childMC (a square) and add another child (a text label). When I create the container, I am trying to add a MouseEvent that can act on each instance of container, but all I can get is a MouseEvent on the object that contains all the MCs added. The code follows.

  Can someone enlight me with that issue or explain what I am doing wrong.

  I do not understand the parental dynamics with AS3 and the absence of the use of instance names and parenting dot does not help.

  Thanks in advance.

  Note to Adobe: previous versions of Flash and as a reference Help files were far more useful than in CS4!

  In the timeline:

  Import assets.myDynMenu;

  var theMenu:myDynMenu = new myDynMenu ("menu.xml");
  stage.addChild (theMenu)

  Stop();

  In the class:

  package assets

  {

  import flash.display. *;
  import flash.events.Event;
  import flash.events.MouseEvent;
  import flash.text.TextField;
  flash.net import. *;

  public class myDynMenu extends Sprite {}

  LOADING EXTERNAL INIT DATA

  public void myDynMenu (theData) {}

  LOADS MENU DATA FROM PREFORMATTED XML
  var loader: URLLoader = new URLLoader();
  var url: URLRequest = new URLRequest (theData);
  loader.addEventListener (Event.COMPLETE, buildTheMenu);
  Loader.Load (URL);
  }

  FULL CHECK LOAD XML MENU DATA - OBJECT BUILDING AND CHILDREN

  public void buildTheMenu(event:Event):void {}

  var xml = new XML (event.target.data);

  for (var i = 0; I < xml.menuData.menuItem.length (); i ++) {}

  ADDS A CONTAINER

  var itemContainer:MovieClip = new MovieClip();
  itemContainer.name = "menu" + i;
  //

  THE NEXT LINE IS NOT DO WHAT I WANTED?
  IN THE FUNCTION BEING CALLED, I NEED TO CONTROL THIS ELEMENT AND ITS CHILDREN

  itemContainer.addEventListener (MouseEvent.MOUSE_OVER, onMouseOver);

  //

  itemContainer.x = 100 * i;
  itemContainer.y = 0;
  itemContainer.mouseEnabled = true;
  itemContainer.mouseChildren = false;
  addChild (itemContainer);

  ADDS A CHILD OF CONTAINER (a square)

  var itemBase:MovieClip = new MovieClip();
  itemBase.graphics.beginFill (xml.menuData.mConfig.mainItemColor);
  itemBase.graphics.drawRect (0,0,xml.menuData.mConfig.mainItemW,xml.menuData.mConfig.mainIt emH);
  itemBase.graphics.endFill ();
  itemBase.name = "basic" + i;
  itemBase.mouseEnabled = false;
  itemBase.mouseChildren = false;
  itemContainer.addChild (itemBase);

  ADDS a CHILD OTHER to CONTAINER (a text label)

  var theLabel:TextField = new TextField();
  theLabel.x = 5;
  theLabel.y = 5;
  theLabel.selectable = false;
  theLabel.mouseEnabled = false;
  theLabel.border = true;
  theLabel.text = xml.menuData.menuItem [i] .mName;
  itemContainer.addChild (theLabel);

  }
  
  }

  It IS THE MOUSE ON WHICH I NEED law to EACH itemContainer (AND CHILDREN)
  private void onMouseOver(event:MouseEvent):void {}

  event.stopPropagation ();
  trace ("you're on" + myIdName);
  }

  
  }

  }

  use:

  package assets

  {

  import flash.display. *;
  import flash.events.Event;
  import flash.events.MouseEvent;
  import flash.text.TextField;
  flash.net import. *;

  public class myDynMenu extends Sprite {}

  LOADING EXTERNAL INIT DATA

  public void myDynMenu (theData) {}

  LOADS MENU DATA FROM PREFORMATTED XML

  
  var loader: URLLoader = new URLLoader();
  var url: URLRequest = new URLRequest (theData);
  loader.addEventListener (Event.COMPLETE, buildTheMenu);
  Loader.Load (URL);
  }

  FULL CHECK LOAD XML MENU DATA - OBJECT BUILDING AND CHILDREN

  public void buildTheMenu(event:Event):void {}

  var xml = new XML (event.target.data);

  for (var i = 0; i)

  ADDS A CONTAINER

  var itemContainer:MovieClip = new MovieClip();
  itemContainer.name = "menu" + i;
  //

  THE NEXT LINE IS NOT DO WHAT I WANTED?
  IN THE FUNCTION BEING CALLED, I NEED TO CONTROL THIS ELEMENT AND ITS CHILDREN

  itemContainer.addEventListener (MouseEvent.MOUSE_OVER, onMouseOver);

  //

  itemContainer.x = 100 * i;
  itemContainer.y = 0;
  itemContainer.mouseEnabled = true;
  itemContainer.mouseChildren = false;
  addChild (itemContainer);

  ADDS A CHILD OF CONTAINER (a square)

  var itemBase:MovieClip = new MovieClip();
  itemBase.graphics.beginFill (xml.menuData.mConfig.mainItemColor);
  itemBase.graphics.drawRect (0,0,xml.menuData.mConfig.mainItemW,xml.menuData.mCon fig.mainItemH);
  itemBase.graphics.endFill ();
  itemBase.name = "basic" + i;
  itemBase.mouseEnabled = false;
  itemBase.mouseChildren = false;
  itemContainer.addChild (itemBase);

  ADDS a CHILD OTHER to CONTAINER (a text label)

  var theLabel:TextField = new TextField();
  theLabel.x = 5;
  theLabel.y = 5;
  theLabel.selectable = false;
  theLabel.mouseEnabled = false;
  theLabel.border = true;
  theLabel.text = xml.menuData.menuItem [i] .mName;
  itemContainer.addChild (theLabel);

  }
    
  }

  It IS THE MOUSE ON WHICH I NEED law to EACH itemContainer (AND CHILDREN)
  private void onMouseOver(event:MouseEvent):void {}

  event.stopPropagation ();
           trace ("you're on" + event.currentTarget.name);
  }

  }

  }

• PL/SQL cursors: definition and purpose

  How are you?
  
  I wanted to ask the following question:
  What is the exact definition of a "slider"? of course, it is not equivalent to a pointer in C/C++.
  
  also, why can not simply RETRIEVE us the data in a RECORD without a slider? in other words, what is the point of a 'slider '?
  
  Obviously, there is a specific purpose of cursors in PL/SQL language, I just wanted to know what it is. The book that I use does not explain the two issues I have just raised.
  
  
  Thank you :)

  In PL/SQL, generally, using variables, you would store stores unique values and can be used for processing later. You would use a SELECT - CLAUSE to extract the required of the database value and store it in your variable. If the SELECT query is extraction of several columns, you would use a different variable for each column name.

  But what to do when your SELECT query returns many rows? And your need is to treat each line in a loop one after the other?

  One solution is to use the sliders (are there others too). Cursors provide a way by which you can run a query that returns multiple records and then loop through the cursor to treat each one record after another.

  In addition, if you worked on any application front end (say J2EE), also would you use cursors (called REFCURSORs in this case) to return the result of the whole (including multiple records) request as a result set. The calling (in this case - a DAO) program loops through the ResultSet and treats each unique record sequentially.

  Personally, I use the sliders in another case - even when the query returns a single row. If I have to go get a big no. (even if only a row) columns in my SELECT query, then I go for a CURSOR, instead of declaring each individual value. In this way, I avoid all of these statements and my code is as compact as it can get. Here's how to use it...

  Report separately the individual values

  declare
     l_val1  my_table.val1%type;
     l_val2  my_table.val2%type;
     l_val3  my_table.val3%type;
     ...
     l_valn  my_table.valn%type;
  
  begin
  ...
     select val1, val2, val3, ... valn
     into   l_val1, l_val2, l_val3, ... l_valn
     from   my_table
     where  <>;
  
     if ((val1 = val2) or (val3 = val4))
     then
        ...
     end if;
  end;
  

  And it's the same thing with the CURSOR

  declare
     cursor l_cur is
        select val1, val2, val3, ... valn
        from   my_table
        where  <>;
  begin
     for rec in l_cur
     loop
        if ((rec.val1 = rec.val2) or (rec.val3 = rec.valn)
        then
           ...
        end if;
     end loop;
  end;
  

  You would see that even in this demo, I saved 5 lines!

  I hope this helps!
  -Shreyas.