MINUS select in ABAP?

Question

I have two tables both with the same key - table A and table B.  Table A will always have either the same or more records than table B.  I want to be able to SELECT those records that exist in table A, but not table B.
In Oracle SQL I would use a MINUS statement, but there doesn't appear to be an equivalient in SAP Open SQL.
The only solution I have is to do a "table A LEFT OUTER JOIN table b" and then look at the records returned and find those with null values returned from table B.  See code below (yes I know, from a functional point of view this example doesn't make sense)
DATA: BEGIN OF ls_join,
        bsid_bukrs TYPE bukrs,
        bsid_belnr TYPE belnr_d,
        bsid_gjahr TYPE gjahr,
        bsid_buzei TYPE buzei,
        bseg_bukrs TYPE bukrs,
      END OF ls_join.
DATA: lt_join LIKE ls_join OCCURS 0.
SELECT bsid~bukrs
       bsid~belnr
       bsid~gjahr
       bsid~buzei
       zbseg~bukrs
  INTO TABLE lt_join
  FROM bsid left outer join zbseg
    ON bsid~bukrs = zbseg~bukrs     AND
       bsid~belnr = zbseg~belnr     AND
       bsid~gjahr = zbseg~gjahr     AND
       bsid~buzei = zbseg~buzei
WHERE bsid~bukrs = '2000'.
DELETE FROM lt_join WHERE bseg_bukrs IS NOT INITIAL.
Surely there must be a better way than this?

Answer 1

> That looks like it would work in WAS 620 and above but, unfortunately, I am coding in SAP 4.6
> where that command is not available
I don#t think this is true, I have seen it many years ago, so it should be possible at least from release 4.0 onwards.
It is your only chance, if you want to solve your problem with OPEN SQL in not with internal tables.
Siegfried