Different number of result

Question

hi all...i wanna ask about my script..
there is 2 query,
query1 returns 76rows and query 2 returns 71rows..
it means not similar each other?
if i use query 1, it take longer time than query 2,
maybe because of sub query..
any suggestion to change query2 ?? because query 2 only takes 0.125 second
and query1 takes 9seconds.. and query 2 there is eror ORA00600 eror internal code..
thanks b4
select A.PRODUCTION_DAY,
A.op_sub_productionunit_code,
A.op_area_code,
substr(A.op_fcty_1_code,1,11),
substr(A.op_fcty_1_code,-5,5)CGS,
theor_net_vol_unadj, theor_net_vol_adj,
gross_vol_wat, alloc_net_vol,
alloc_vol_wat,
A.CORR_FACTOR FROM (SELECT * FROM STRM_PROD_DAILY
WHERE STREAM_PHASE = 'OIL' )A,
(SELECT T.DATE_TIME,s.gross_vol_wat,s.alloc_vol_wat,
d.op_fcty_1_code
FROM WTR_DAYPROD S,
STREAM_DIM D,TIME_DIM T
WHERE  CODE LIKE '%MFL%' AND STREAM_CATEGORY = 'WAT_PROD'AND S.STREAM_KEY = D.STREAM_KEY
AND S.TIME_KEY = T.TIME_KEY  
)B WHERE A.op_sub_productionunit_code = 'SLN'
AND A.PRODUCTION_DAY = '1-JAN-2008'
AND A.OP_FCTY_1_CODE IS NOT NULL
AND B.OP_FCTY_1_CODE(+) = A.OP_FCTY_1_CODE
AND B.DATE_TIME(+) = A.PRODUCTION_DAY----
SELECT P.PRODUCTION_DAY,P.op_sub_productionunit_code, P.op_area_code, substr(P.op_fcty_1_code,1,11),substr(P.op_fcty_1_code,-5,5)CGS,
theor_net_vol_unadj, theor_net_vol_adj, gross_vol_wat, alloc_net_vol, alloc_vol_wat,P.CORR_FACTOR FROM STRM_PROD_DAILY P,WTR_DAYPROD S,STREAM_DIM D,TIME_DIM Twhere P.OP_SUB_PRODUCTIONUNIT_CODE = 'SLN'
and  p.STREAM_PHASE = 'OIL'
AND S.STREAM_KEY = D.STREAM_KEY
AND S.TIME_KEY = T.TIME_KEY
AND  D.OP_FCTY_1_CODE(+) = P.OP_FCTY_1_CODE
AND T.DATE_TIME(+) = P.PRODUCTION_DAY

Answer 1

sorry i didnt understand, first u say "query 2 returns 71rows.." and then again
"query 2 there is eror ORA00600 eror internal code"