Oracle/PHP "Invalid Identifier" Errors - php

Question

I'm really not sure what's going on at this point. I'm trying to create a view, and when I run the query below:
$view = oci_parse($conn, '
CREATE OR REPLACE VIEW
V_ORD_HISTORY
AS
SELECT
ARCUSTO.ID,
ORDERS.ID,
ORDERS.PONO,
ORDERS.ORDERNO,
ORDERS.DATE_TAKEN,
ORDERS.ARCUSTO_ID,
ORD_DETAIL.ORDERS_ID,
ORD_DETAIL.ID,
ORD_DETAIL.TOTAL_QTY_ORD,
ORD_DETAIL.CUMM_SHIPPED,
ORD_DETAIL.DISCOUNT,
ORD_DETAIL.UNIT_PRICE
FROM
ARCUSTO a,
ORDERS o,
ORD_DETAIL d,
ARINVT i
WHERE
a.ID = o.ARCUSTO_ID
AND
d.ORDERS_ID = o.ID
');
I get the error:
ORA-00904: "ORD_DETAIL"."UNIT_PRICE": invalid identifier
And if I try to delete ORD_DETAIL.UNIT_PRICE from the end of the select statement, then it tells me that ORD_DETAIL.DISCOUNT is now the invalid identifier. Whichever column is last in the list becomes the invalid identifier. If I remove the prefix to determine which table, then I get column ambiguously defined errors.
Any ideas??
EDIT 1
I've now changed the code to the following:
$view = oci_parse($conn, '
CREATE OR REPLACE VIEW
V_ORD_HISTORY
AS
SELECT
a.ID as CUSTOMER_ID,
o.ID as ORD_ID,
o.PONO,
o.ORDERNO,
o.DATE_TAKEN,
o.ARCUSTO_ID,
d.ORDERS_ID,
d.ID as DETAIL_ID,
d.TOTAL_QTY_ORD,
d.CUMM_SHIPPED,
d.DISCOUNT,
d.UNIT_PRICE
FROM
ARCUSTO a,
ORDERS o,
ORD_DETAIL d,
ARINVT i
WHERE
CUSTOMER_ID = o.ARCUSTO_ID
AND
ORD_ID = d.ORDERS_ID
');
But now it's saying that ORD_ID is an invalid identifier. This its the last line of the SQL statment.

Answer 1

How about trying :
CREATE OR REPLACE VIEW
V_ORD_HISTORY
AS
SELECT
a.ID as CUSTOMER_ID,
o.ID as ORD_ID,
o.PONO,
o.ORDERNO,
o.DATE_TAKEN,
o.ARCUSTO_ID,
d.ORDERS_ID,
d.ID as DETAIL_ID,
d.TOTAL_QTY_ORD,
d.CUMM_SHIPPED,
d.DISCOUNT,
d.UNIT_PRICE
FROM
ARCUSTO a,
ORDERS o,
ORD_DETAIL d,
ARINVT i
WHERE
a.id= o.ARCUSTO_ID
AND
o.id = d.ORDERS_ID