database :ORACLE 9i
i'm writing following query,for single record it gives proper result,but whole records it gives mismatch data.
select contract_number , Product_code, trandate, "prev_statu s", "curr_statu s"
from
(
select contract_number , Product_code, trandate, lag(status_code ) over (order by trandate asc) "prev_statu s",
status_code "curr_statu s"...
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