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Error on datatype
Hi Guys,
I have a problem whereby i got below error once i execute my query.
'ORA-01790: expression must have same datatype as corresponding expression'
i would like to create a column with no data in it and union with another query which the datatype is date.
please find below queries.
select rsh.receipt_num reciept_no, '' transfer_date from RCV_SHIPMENT_HEADERS rsh, RCV_TRANSACTIONS rv where rv.shipment_header_id = rsh.shipment_header_id
union
select rsh.receipt_num reciept_no, nvl(rvD.transaction_date, null) transfer_date from RCV_SHIPMENT_HEADERS rsh, RCV_TRANSACTIONS rv where rv.shipment_header_id = rsh.shipment_header_id
thanks
ahbo01
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Please be aware this is the last time I work in a non-formatted query of yours.
1- Try this...
Code:
select rsh.receipt_num reciept_no,
decode(TO_DATE('01/01/2050','mm/dd/yyyy'),TO_DATE('01/01/2050','mm/dd/yyyy'),NULL) transfer_date
from RCV_SHIPMENT_HEADERS rsh,
RCV_TRANSACTIONS rv
where rv.shipment_header_id = rsh.shipment_header_id
union
select rsh.receipt_num reciept_no,
nvl(rvD.transaction_date, null) transfer_date
from RCV_SHIPMENT_HEADERS rsh,
RCV_TRANSACTIONS rv
where rv.shipment_header_id = rsh.shipment_header_id
;
2- Could you please let us know why are you using that NVL() function?.. do you really want to show NULLs when you already have NULLs?
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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