Compare two rows in same table

Hi,
I want to compare two rows (some columns) in the same table, and if the data in the data columns is different, I want to pick the latest one. The table is date tracked. For instance I have an address table with different addresses for an employee with effective date. I want to be able to pick the latest row if the postal code is different for the 2 rows. Is this possible in sql. I can do this in Pl/sql, but dont want to use it. Eg
address_id, postal_code, person_id,last_update_date
123, pn123,1,12-JAN-01
124,pu124,1,13-JAN-01
I want to be able to retrieve just the second line.
Any help is appreciated

Welcome to the forum!
Whenever you post please provide your 4 digit Oracle version (result of SELECT * FROM V$VERSION).
>
The table is date tracked. For instance I have an address table with different addresses for an employee with effective date. I want to be able to pick the latest row if the postal code is different for the 2 rows.
>
Your question is a little confusing because you are using terms like 'date tracked' and 'effective date' without explaining exactly what your definitions of those terms is.
Why do you want the latest record ONLY if the postal code is different? What if the address is different? Then which record do you want?
Why not just take the record for each person/company that has the latest date? If the data is the same then it doesn't which record you get so the one with the latest date will do. And if the data is different taking the one with the latest date gives you the latest data.
The classic definition of effective date is 'the date the information becomes effective'. Information with a given effective date is NOT in effect before that date and is SUPERCEDED when data is entered with a later effective date if the actual date is later than or equal to the effective date. Using your data
>
123, pn123,1,12-JAN-01
124,pu124,1,13-JAN-01
>
The first record IS NOT effective for dates prior to 12-JAN-01. In fact for a query looking for data prior to that date there isn't any data.
The first record is also NOT effective for dates on or after 13-JAN-01. Only the second record is effective.
If you added a record for 14-JAN-01 this record would not be effective until on or after that date (i.e. not for another 4 1/2 months).
So for the classic definition of effective date the query needs to provide the AS OF date to use to obtain the data. If, as in your system, you are not allowed to create records with dates in the future and you just want the latest record then you can just select the record with the MAX(myDate) value for the given person_id, address_id or whatever your key values are.
Edited by: rp0428 on Aug 11, 2012 7:50 AM

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SQL*Plus: Release 10.2.0.1.0 - Production on Pn Gru 6 13:14:22 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Enter password:
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        RowSetIterator rsi = departmentsIterator.getRowSetIterator();
        int indexOfDropRow = rsi.getRangeIndexOf(dropRow);
        //remove dragged row from collection so it can be added back
        dragRow.removeAndRetain();
        rsi.insertRowAtRangeIndex(indexOfDropRow, dragRow);
        //make row current in ADF iterator.
        departmentsIterator.setCurrentRowIndexInRange(indexOfDropRow);
        //ppr the table
        AdfFacesContext adfctx = AdfFacesContext.getCurrentInstance();
        //note that the refresh of the table didn't work when refreshing the table
        //so I needed to refresh the container component (af:panelStretchLayout).
        adfctx.addPartialTarget(table.getParent());
        return DnDAction.MOVE;
does the trick. I changed the line to
//get access to the oracle.jbo.Row instance represneting this table row
        Object objdragg = table.getRowData(draggedRowKey);
        Row dragRow = (Row) objdragg;
so you don't need the detour through the JUCtrlHierNodeBinding any longer.
Timo

Comparing totals from the same table

I am trying to compare data from the same table..
i am using an alias of the table to set up the select but i am running into a cartesian set.
I am comparing data (totals) from different dates from the same table ; i have included the query which is giving me a problem:
select a.date_in,b.date_in,a.Table_name,
DECODE(a.schema_name,
'EZLIVE','ITP','EZAC','ACT','OTHER')AS DEPT,
a.type,
a.status,
a.TOTAL,
b.total
from agg_results a,agg_results b
where a.schema_name=b.schema_name
and to_char(a.date_in,'mm/dd/yyyy')='&date_in'
and to_char(b.date_in,'mm/dd/yyyy')='&date_in';
any help thanks
Ellery

I think you need to join in-line views instead of the tables directly. something like:
SELECT a.date_in,b.date_in,a.table_name,a.dept,a.type,a.status,a.total,b.total
FROM (SELECT date_in,table_name,
             DECODE(schema_name,'EZLIVE','ITP',
                                'EZAC','ACT','OTHER') dept,
             type,status,total
      FROM agg_results
      WHERE date_in = to_date('&date_in','mm/dd/yyyy') a,
     (SELECT date_in,table_name,
             DECODE(schema_name,'EZLIVE','ITP',
                                'EZAC','ACT','OTHER') dept,
             type,status,total
      FROM agg_results
      WHERE date_in = to_date('&date_in','mm/dd/yyyy') b
WHERE a.dept = b.deptTTFN
John

VORowImpl problem - comparing two ROW[] lists

Hi Everyone,
I have a huge proble right now, I'm trying to compare two VO list with the same values, this is because one it's attached to an advancedtable in the xml page wich the user can change some values, and the other one is from the values of the table but from the DB, the reason is to made a validation to compare the original values from the DB with the list from the tabla and update only the rows that the users made changes in their values, here's my code for a better explain of what I'm doing:
public void saveChanges(){
OADBTransactionImpl oadbtransactionimpl = (OADBTransactionImpl)getDBTransaction();
Row[] rows1 = getAppVO1().getAllRowsInRange();
Row[] rows2 = getDBVO1().getAllRowsInRange();
for(int i = 0; i < rows1.length; i++){
int j = i;
//Colections to compare
//r1: colection from the app
//r2: colection from BD
AppVORowImpl r1 = (AppVORowImpl) rows1;
DBVORowImpl r2 = (DBVORowImpl) rows2[j]; //<--- here in the second iteration appears the following error:
// "oracle.apps.fnd.framework.OAException: java.lang.ArrayIndexOutOfBoundsException: 1"
//variables string to check if got changes in the column
String columnAPP = r1.getId().toString();
String columnBD = r2.getId().toString();
//'if' that validates changes
if(!columnAPP.equals(columnBD)){
//String variable SP
StringBuilder procedureCall = new StringBuilder();
//calling to SP
try{
procedureCall.append("... stored proc...");
OracleCallableStatement oraclecallablestatement = (OracleCallableStatement)oadbtransactionimpl.createCallableStatement(procedureCall.toString(), -1);
oraclecallablestatement.execute();
getOADBTransaction().commit();
}catch(SQLException sqlexception){
System.err.println("SQL Exception: "+ sqlexception.getMessage());
getOADBTransaction().rollback();
throw OAException.wrapperException(sqlexception);
}catch(Exception e){
System.err.println("Exception: "+ e.getMessage());
getOADBTransaction().rollback();
throw OAException.wrapperException(e);
the first iteration works fine, but the second and futher shows an exception error, what can I do to make this method works?
I'll be pending to your answers, I really hope you can help me with this one
Regards,
Mentor

Here is the dump code for you. Code you have to write in AmImpl and call the same from Controller class.
AMImpl Code
public void executeBothViewObjects() //Calls this method from Controller *ProcessRequest*
        OAViewObject vo = (OAViewObject)getMainViewObjectVO1();
        OAViewObject dvo = (OAViewObject)getDBViewObjectVO1();
       if (vo != null && dvo != null)
                     //1st VO
                       dvo.setWhereClauseParams(null);
                      //Set where clause if Any dvo.setWhereClauseParam(0,xx);
                      dvo.executeQuery();
                     //2nd VO
                     vo.setWhereClauseParams(null);
                      //Set where clause if Any dvo.setWhereClauseParam(0,xx);
                     vo.executeQuery();
public void compareViewObject()   // Calling this method to compare Attribute of both View Object *Process Form Request*
      OAViewObject vo = getMainViewObjectVO1();
      OAViewObject OrigVO = getDBViewObjectVO1();
      MainViewObjectVORowImpl rowi = null;
      DBViewObjectVORowImpl rowii = null;
      int fetchedRowCount = vo.getRowCount();
      int OriginalfetchedRowCount = OrigVO.getRowCount();
     RowSetIterator originalSelectIter = OrigVO.createRowSetIterator("originalSelectIter");
     RowSetIterator selectIter = vo.createRowSetIterator("selectIter");
     if (fetchedRowCount > 0 && OriginalfetchedRowCount >0)
          selectIter.setRangeStart(0);
          selectIter.setRangeSize(fetchedRowCount);
          originalSelectIter.setRangeStart(0);
          originalSelectIter.setRangeSize(OriginalfetchedRowCount);
          for (int i = 0; i < fetchedRowCount; i++)
            rowi = (MainViewObjectVORowImpl)selectIter.getRowAtRangeIndex(i);
            rowii = (DBViewObjectVORowImpl)originalSelectIter.getRowAtRangeIndex(i);
           //Compare Attribute here
               if((!(rowi.getRoleStartDate().equals(rowii.getRoleStartDate()))
                        // Comparing Start date here of both View Object
             else if(((rowi.getRoleEndDate().equals(rowii.getRoleEndDate()))
                   // Comparing End date here of both View Object
}Thanks
--Anil
http://oracleanil.blogspot.com/

Compare Consecutive Rows in a table

Hi,
I want to compare consecutive rows for each employee. I need to compare SchedulEnd column of the first row with the ScheduleStart of the second row as so on. if both the values are same then i need to generate a sequence like 00 for the first record 01 for
the second record and so on. if the time is not same the the sequence should start with 00.
Example: lets say the data is like:
schedule start
schedule end
10
11
11
12
12
13
15
18
the output should be like
sequence
00
01
02
00

Thank you very much for the quick reply.
I have one more scenario now, with the same data, i want the output like this
<table>
<tr>
<th>Employee</th>
<th>Schedule Time</th>
<th>sequence</th>
<th>Remarks</th>
</tr>
<tr>
<td>1</td>
<td>10</td>
<td>00</td>
<td>sequence "00" as schedule time is unique, 10 is the schedule start time</td>
</tr>
<tr>
<td>1</td>
<td>11</td>
<td>00</td>
<td>sequence "00" as schedule time is unique, 11 is the schedule end time for the first record</td>
</tr>
<tr>
<td>1</td>
<td>11</td>
<td>01</td>
<td>sequence "01" as schedule time is unique, 11 is the schedule start time of the next record</td>
</tr>
<tr>
<td>1</td>
<td>12</td>
<td>00</td>
<td>sequence "00" as schedule time is unique, 12 is the schedule end time of the previous record</td>
</tr>
<tr>
<td>1</td>
<td>12</td>
<td>01</td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>

I need to retrieve the a set of rows in between two rows from a table.

consider employees table and primary key employee_id.
With out using EMPLOYEE_ID column in the where clause or between clause, I need to get the records between 104 and 116 or a set of records between two rows.
Can any one help me in this... i know this is simple but am just a fresher to oracle development... help me grow....
Thanks,
Arun

ya at last i got the out put... thank guys for thinking with me....
SELECT rownum, employee_id FROM (SELECT rownum, employee_id FROM employees ORDER BY employee_id)
WHERE ROWNUM <=8
MINUS
SELECT rownum, employee_id FROM (SELECT rownum, employee_id FROM employees ORDER BY employee_id) WHERE ROWNUM <= 4

Compare two rows in same table

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