24786 - Updating a master data set containing duplicates with all matching duplicates from a look-up data set

Sample 24786: Updating a master data set containing duplicates with all matching duplicates from a look-up data set

/***********************************************************************/
/* There is no automatic update of like named variables with KEY=.     */
/* If the goal is to accumulate the values of INVENTORY instead of     */
/* overwriting them, an accumulation statement is needed.              */
/*                                                                     */
/* The automatic variable _IORC_ is tested using the mnemonics defined */
/* in the SAS-supplied %SYSRC autocall macro.  The value _SOK means a  */
/* match was found, and the value _DSENOM means a match was not found. */
/***********************************************************************/

data master (index=(x));
  input x y;
datalines;
1 2
1 3
2 4
3 5
5 2
;


data trans;
  input x y;
datalines;
1 8
1 2
3 9
5 2
;

data master;
  set trans(rename=(y=y2));
  by x;
  dummy=0;
  do until (_IORC_=%sysrc(_dsenom));
    if dummy then x=.;
    modify master key=x;
    select (_iorc_);
      when (%sysrc(_sok)) do;
        y=y + y2;
        replace;
      end;
      when (%sysrc(_dsenom)) do;
        _ERROR_=0;
        if not last.x and not dummy then do;
          dummy=1;
          _IORC_=0;
        end;
      end;
      otherwise ;
    end;
  end;
run;

proc print data=master;
run;

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Obs    x     y

 1     1    12
 2     1    13
 3     2     4
 4     3    14
 5     5     4

Type:	Sample
Topic:	SAS Reference ==> DATA Step SAS Reference ==> Statements ==> File-handling ==> MODIFY Common Programming Tasks ==> Combining Data SAS Reference ==> Statements ==> File-handling ==> MODIFY ==> with KEY=

Date Modified:	2008-01-25 14:39:15
Date Created:	2004-09-30 14:09:14

Product Family	Product	Host	SAS Release
			Starting	Ending
SAS System	Base SAS	All	n/a	n/a

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Sample 24786: Updating a master data set containing duplicates with all matching duplicates from a look-up data set

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