Problem in making SQL Query

Hello All,
I have one problem regarding sql query.
I have one internal table which contains equnr and bis as fields. There are two database tables egerr and eastl. The structure for tables are as follows:
Fields for egerr:
equnr, bis, logiknr in which first two fields form key.
Field for eastl:
anlage, bis, logiknr in which all fields form primary key.
I want to select records from internal table which does not have record in eastl.
For the reference we can extract logiknr from egerr by using intarnal table and then use this logiknr to check entry in table eastl. but i want those equnr which are in internal table but not mapped in eastl.
I want the most efficient solution for this as there are many records.
Thanks..... and if you have any queries then let me know.
Jignesh.

hi,
as per ur statement, u want the field equnr which exists in the internal table but not in eastl. now for comparing with eastl u will need to check for all the three fields as they form the key...
get data from egerr for matching equnr and bis in your internal table
i.e. assuming ur table is itab and itab_logiknr contains a single field logiknr
select logiknr from egerr
into table itab_logiknr
for all entries in itab
where equnr eq itab-equnr
and bis eq itab-bis.
now from this data (itab_egerr), compare the data with that in eastl for matching (or non matching) values of logiknr
assuming data from eastl lies in itab_eastl
select anlage bis logiknr from eastl into itab_eastl
for all entries in itab_logiknr
where logiknr eq itab_logiknr-logiknr.
for non matching entries u can select data from eastl which is not present in itab_eastl now....
(but mind you....since all fields of eastl form the key, u might not be getting the correct data) so if possible study ur scenario again and see if u can search the eastl table comparing all fields in the primary key)
try this....get back in case of any clarifications
hope it gives u some pointers...
regards,
PJ

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