Please help : How to remove duplicates in BIP

Question

Hi All,
As told you all before that i have just started using the BIP and now i am facing an issue filtering out the duplicates from the sql query. Following is the issue and the output which i want.
This is how the data is ( example)
Srno product_id product_name
1 AAX2 conntx
1 AAX3 symmtx
2 AAX4 seagte
3 BBZ3 harddx
4 LLN7 ddr
4 LLN5 ddr1
the above data is sorted on snro ascending
Now i want the data last record for all the duplicates srno's for ex: for srno 1 and srno 4, i want to select the record with the product AAX3 and LLN5 resp and i want to implement the same at the rtf template level and not sure of the xml logic which i should use. i know i can do this at the db level using the oracle's lag function but then there are performance issues with it.
Can anybody please tell me the logic to eliminate the duplicates at the rtf template level.
Please treat this as urgent!
Thanks
Ronny

Answer 1

You may group by SRNO and then check the current position within the group to equal the group count. Here is the example:
The XML:
<ROWSET>
     <ITEM>
          <SRNO>1</SRNO>
          <PRODUCT>AAX2</PRODUCT>
          <DESC>conntx</DESC>
     </ITEM>
     <ITEM>
          <SRNO>1</SRNO>
          <PRODUCT>AAX3</PRODUCT>
          <DESC>symmtx</DESC>
     </ITEM>
     <ITEM>
          <SRNO>2</SRNO>
          <PRODUCT>AAX4</PRODUCT>
          <DESC>seagte</DESC>
     </ITEM>
     <ITEM>
          <SRNO>3</SRNO>
          <PRODUCT>BBZ3</PRODUCT>
          <DESC>harddx</DESC>
     </ITEM>
     <ITEM>
          <SRNO>4</SRNO>
          <PRODUCT>LLN7</PRODUCT>
          <DESC>ddr</DESC>
     </ITEM>
     <ITEM>
          <SRNO>4</SRNO>
          <PRODUCT>LLN5</PRODUCT>
          <DESC>ddr1</DESC>
     </ITEM>
</ROWSET>The template:
<?for-each-group:ROWSET/ITEM;SRNO?>
   <?for-each:current-group()?>
      <?if:position()=count(current-group()/SRNO)?>
          <?SRNO?>   <?PRODUCT?>  <?DESC?>
      <?end if?>
   <?end for-each?>
<?end for-each-group?>The result:
1 AAX3 symmtx
2 AAX4 seagte
3 BBZ3 harddx
4 LLN5 ddr1