PLease Help...

hello Guys!

how can i make faster the process in selection of data..please check this code..

SELECT belnr gjahr
FROM bkpf
INTO TABLE lt_belnr
FOR ALL ENTRIES IN lt_vbeln
WHERE gjahr = lt_vbeln-fkdat+0(4)
AND monat = lt_vbeln-fkdat+4(2)
AND blart = 'RV'
and awkey = lt_vbeln-vbeln
and budat = lt_vbeln-fkdat.

when executing this code process is very slow..what is the best thing to run this faster..

thank you.