SQL & PL/SQL :: To Get Rid Of Looping

The below sql is executed by reading the flat file row by row which is having more than 2 million rows.

SELECT CUST_SEQ_R, BANK_BRANCH_C INTO v_CustNo, v_BrnachCode
FROM TABLE1
WHERE ACCOUNT_NO = v_Acc_No
AND VIST_NO = v_VistnO
AND CUST_JOIN_DATE = to_Date(v_Cust_Date,'yyyymmdd');

The procedure opens the file, reads one record, parses it, then it executes few select statements then it loops back to the top where it reads one more record and runs through each activity again. How to read batch of records rather than one record at a time. Is something like creating staging table or by using bulk collect.

v_Acc_No,v_VistnO,v_Cust_Date are variables that read from below file.

test data:
BNC192363A1291197OQ6HA0H05557004559020080528
BNC194566A1280615VT8FA0H05917004016020080530
BNC192588A1263301VB2LE0G11065005707020080519
BNC178369A1295822MM4XB0G11820006839020080512