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  3. July 2015

RE: Using LATERAL for pivoting table

what you are doing is really a Cross Join or a simple cartesian join
forcing all records from one file with all records in the other
file. The statement is rewritable as:

select ICPROD, t1.ICFAC, t2.icfac
from (select distinct ICPROD from CIC) CIC
cross join
lateral(select ICFAC from CIC b
where ICPROD=CIC.ICPROD
fetch first row only) t1
cross join
lateral(select ICFAC from CIC b
where ICPROD=CIC.ICPROD
and ICFAC not in (t1.icfac)
fetch first row only) t2

Jim

That's what I used initially, but a cross join only gives gives me records
where there are records for all fields in the pivot. For example, I wasn't
seeing records where there was only one facility match, so I resorted to
the left outer join, which was giving me what I wanted.


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