Keep only cases from Master file whose id are in second file

*(Q) I have a data base (a *.sav file) with an id. There 
	is also second *.sav file containing a list of id which must be selected from the data base,
	How can I do that.

*(A) Posted to SPSSX-L list by rlevesque@videotron.ca on 2002/10/15.

DATA LIST LIST /id data1 TO data4.
BEGIN DATA
1 1 1 1 1
1 2 1 1 2
2 1 1 1 3
2 2 2 2 4
3 1 1 1 1

END DATA.
LIST.
SORT CASES BY id.
SAVE OUTFILE='c:\\temp\\database.sav'.

DATA LIST LIST /id.
BEGIN DATA
1  
3  
END DATA.
LIST.
SORT CASES BY id.
SAVE OUTFILE='c:\\temp\\id to keep.sav'.

***** Start job.
GET FILE='c:\\temp\\database.sav'.

MATCH FILES /FILE=*
 /TABLE='C:\\Temp\\id to keep.sav'
 /IN=keepcase
 /BY id.

* Next lines deletes unwanted cases.
SELECT IF keepcase=1.
* Delete the variable keepcase.
MATCH FILES FILE=* /DROP=keepcase.