Oracle complex Join - sql

Question

I have three queries,query 1 and query 2 have to be inner joined on Customer_number
Resultant output from query1 and query2 will be further inner joined on 3 keys customer_number,account_number,bank_number.
Can anyone help me to write the queries for these.I am not able to derive it.
Thanks in advance,
Bhaskar
Query1 :
SELECT
CUST.BANK_NUMBER as CUSTBANKNUMBER,
CUST.CUSTOMER_NUMBER,
CUST.DATE_DECEASE,
FROM
SIGN_LND.T_CUSTOMER_MASTER_FILE_LND CUST
LEFT OUTER JOIN
SIGN_LND.T_CUST_USER_DEF_FIELDS_LND USER_DEF
ON (CUST.CUSTOMER_NUMBER = USER_DEF.CUSTOMER_NUMBER AND CUST.EFF_DT = USER_DEF.EFF_DT)
WHERE
CUST.EFF_DT = TO_DATE('2015-01-22','YYYY-MM-DD')
Query 2 :
SELECT
S.CUSTOMER_NUMBER,
S.ALIAS_ACCOUNT_NBR,
M.BANK_NUMBER,
M.ACCOUNT_NUMBER,
M.PRODUCT_CODE,
M.APPLICATION_NUMBER,
M.APPL_ID
FROM
(
SELECT T1.BANK_NUMBER,
T1.ACCOUNT_NUMBER,
T1.PRODUCT_CODE,
CAST (NULL AS VARCHAR(5)) AS SUB_PRODUCT_CODE,
T1.APPLICATION_NUMBER,
T1.APPL_ID
FROM SIGN_LND.T_LOAN_MASTER_FILE_LND T1
INNER JOIN SIGN_LND.T_LOAN_PRODUCT_DEFINITION_LND T2
ON T1.BANK_NUMBER = T2.BANK_NUMBER
AND T1.PRODUCT_CODE = T2.PRODUCT_CODE
AND T1.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
AND T2.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
WHERE T1.PRODUCT_CODE IS NOT NULL
AND T1.DATE_OPEN IS NOT NULL
UNION ALL
SELECT T1.BANK_NUMBER,
T1.ACCOUNT_NUMBER,
T1.PRODUCT_CODE,
T1.PRODUCT_CODE AS SUB_PRODUCT_CODE,
T1.APPLICATION_NUMBER,
T1.APPL_ID
FROM SIGN_LND.T_TA_MASTER_FILE_LND T1
INNER JOIN SIGN_LND.T_TA_PRODUCT_DEFINITION_LND T2
ON T1.BANK_NUMBER = T2.BANK_NUMBER
AND T1.PRODUCT_CODE = T2.PRODUCT_CODE
AND T1.ACCOUNT_TYPE = T2.ACCOUNT_TYPE
AND T1.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
AND T2.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
LEFT JOIN SIGN_LND.T_BONUS_INT_MASTER_FILE_LND T3
ON T1.ACCOUNT_NUMBER = T3.ACCOUNT_NUMBER
AND T1.BANK_NUMBER = T3.BANK_NUMBER
AND T3.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
WHERE T1.PRODUCT_CODE IS NOT NULL
AND T1.ACCOUNT_STATUS_CODE IS NOT NULL
AND T1.DATE_OPEN IS NOT NULL
UNION ALL
SELECT T1.BANK_NUMBER,
T1.ACCOUNT_NUMBER,
T1.PRODUCT_CODE,
T1.PRODUCT_CODE AS SUB_PRODUCT_CODE,
T1.APPLICATION_NUMBER,
T1.APPL_ID,
FROM SIGN_LND.T_TIME_MASTER_FILE_LND T1
INNER JOIN SIGN_LND.T_TM_PRODUCT_DEFINITION_LND T2
ON T1.BANK_NUMBER = T2.BANK_NUMBER
AND T1.PRODUCT_CODE = T2.PRODUCT_CODE
AND T1.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
AND T2.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
LEFT JOIN SIGN_LND.T_BONUS_INT_MASTER_FILE_LND T3
ON T1.ACCOUNT_NUMBER = T3.ACCOUNT_NUMBER
AND T1.BANK_NUMBER = T3.BANK_NUMBER
AND T3.EFF_DT=TO_DATE('2015-01-22','YYYY-MM-DD')
WHERE T1.PRODUCT_CODE IS NOT NULL
AND T1.ACCOUNT_STATUS_CODE IS NOT NULL
AND T1.DATE_OPEN IS NOT NULL
)M
INNER JOIN
(
SELECT
T1.ACCOUNT_NUMBER,
T1.CUSTOMER_NUMBER,
T1.RELATIONSHIP ,
T2.ALIAS_ACCOUNT_NBR,
T2.APPLICATION_NUMBER
FROM SIGN_LND.T_CUSTOMER_CROSS_REF_LND T1
INNER JOIN
SIGN_LND.T_ALIAS_ACCT_NBR_CRSS_REF_LND T2
ON T1.ACCOUNT_NUMBER=T2.ACCOUNT_NUMBER
WHERE ALIAS_ACCOUNT_NBR_TYPE='UK'
GROUP BY T1.ACCOUNT_NUMBER,
T1.CUSTOMER_NUMBER,
T1.RELATIONSHIP ,
T2.ALIAS_ACCOUNT_NBR,
T2.APPLICATION_NUMBER
)S
ON M.ACCOUNT_NUMBER=S.ACCOUNT_NUMBER
AND
M.APPLICATION_NUMBER=S.APPLICATION_NUMBER
)
Query3:
SELECT
SPLIT.BANK_NUMBER,
SPLIT.CUSTOMER_NUMBER,
SPLIT.DATE_MOVING_IN,
SPLIT.TITLE,
SPLIT.FIRST_NAME,
SPLIT.SECOND_NAME,
SPLIT.SURNAME,
SPLIT.CURR_APT_NUMBER_UPS,
SPLIT.CURR_HOUSE_NAME_UPS,
SPLIT.CURR_HOUSE_NBR,
SPLIT.CURR_STREET_UPS,
SPLIT.CURR_DISTRICT_UPS,
SPLIT.CURR_POST_TOWN_UPS,
SPLIT.POSTAL_CODE,
SPLIT.CURR_COUNTRY,
CUST_EXT.LOYALTY_CARD_NBR,
XREF.ACCOUNT_NUMBER,
XREF.RELATIONSHIP as RELATIONSHIP_RB,
RB_ALIAS_XREF.APPL_ID as RBXREFAPPID,RB_ALIAS_XREF.ALIAS_ACCOUNT_NBR AS ALIAS_ACCOUNT_NBR_RB,
PROD_OFFER.DATE_CLOSE
FROM
(
SIGN_LND.T_CIF_SPLIT_NAME_ADDR_UPS_LND SPLIT
LEFT OUTER JOIN
SIGN_LND.T_CUST_MASTER_EXTENSION_LND CUST_EXT
ON (SPLIT.CUSTOMER_NUMBER = CUST_EXT.CUSTOMER_NUMBER AND SPLIT.EFF_DT = CUST_EXT.EFF_DT)
)
LEFT OUTER JOIN
(
SIGN_LND.T_CUSTOMER_CROSS_REF_LND XREF
LEFT OUTER JOIN
(
SELECT * FROM SIGN_LND.T_ALIAS_ACCT_NBR_CRSS_REF_LND WHERE EFF_DT = TO_DATE('2015-01-22','YYYY-MM-DD') AND ALIAS_ACCOUNT_NBR_TYPE = 'RB'
) RB_ALIAS_XREF
ON (XREF.ACCOUNT_NUMBER = RB_ALIAS_XREF.ACCOUNT_NUMBER AND XREF.EFF_DT = RB_ALIAS_XREF.EFF_DT)
LEFT OUTER JOIN
SIGN_LND.T_PRODUCT_OFFER_PURCHASE_LND PROD_OFFER
ON (XREF.BANK_NUMBER = PROD_OFFER.BANK_NUMBER AND XREF.ACCOUNT_NUMBER = PROD_OFFER.ACCOUNT_NUMBER AND XREF.EFF_DT = PROD_OFFER.EFF_DT)
)
ON (SPLIT.CUSTOMER_NUMBER = XREF.CUSTOMER_NUMBER AND SPLIT.EFF_DT = XREF.EFF_DT)
WHERE SPLIT.EFF_DT = TO_DATE('2015-01-22','YYYY-MM-DD')``

Answer 1

This should work
WITH query1 as
(your query 1 code),
query2 as
(you query 2 code),
query3 as
(your query 3 code)
select * from query1
join query2 on query1.Customer_number=query2.Customer_number
join query3 on query3.customer_number=query2.customer_number
and query3.account_number=query2.account_number
and query3.bank_number=query2.bank_number