Trying "over partition by" and its not working - sql

Question

This works:
select top 100 cti.tradingitemid, pe.pricingDate, pe.priceClose, pe.adjustmentFactor, cc.countryId, cc.companyId
from ciqcompany cc
join ciqfinperiod cfp on cfp.companyid=cc.companyid
join ciqfininstance cfi on cfi.financialperiodid=cfp.financialperiodid
join ciqsecurity cs on cs.companyid = cc.companyid
join ciqtradingitem cti on cti.securityid=cs.securityid
join ciqPriceEquity pe on pe.tradingItemId=cti.tradingItemId
where pe.pricingDate >= '1974-12-31 00:00:00.000' and pe.pricingDate <'1975-02-01 00:00:00.000' and cc.countryId = 213
order by cc.companyId
The problem is that I get hundreds of lines for the same companyID. I just want one per companyID, the first one would work fine.
I've been looking around and this is the best I could come up with:
select *
FROM (
Select cti.tradingitemid,
pe.pricingDate,
pe.priceClose,
pe.adjustmentFactor,
cc.countryId
Row_number() OVER (PARTITION BY cc.companyId ORDER BY pe.pricingDate) RN
from ciqcompany cc
join ciqfinperiod cfp on cfp.companyid=cc.companyid
join ciqfininstance cfi on cfi.financialperiodid=cfp.financialperiodid
join ciqsecurity cs on cs.companyid = cc.companyid
join ciqtradingitem cti on cti.securityid=cs.securityid
join ciqPriceEquity pe on pe.tradingItemId=cti.tradingItemId
where pe.pricingDate >= '1974-12-31 00:00:00.000' and pe.pricingDate <'1975-02-01 00:00:00.000' and cc.countryId = 213
order by cc.companyId
)
Where rn = 1
The syntax at Row_number() is throwing it off, but to me it looks like other examples I see.
Any ideas would be much appreciated.

Answer 1

Would this work?
SELECT *
FROM (
.....
---- missing comma after cc.countryId
---- remove order by
) A
WHERE
A.RN = 1
ORDER BY cc.companyId

Answer 2

Three things:
Your subquery needs a table alias.
The subquery cannot contain order by.
And you need a comma before row_number().
So:
select t.*
from ( Select cti.tradingitemid,
pe.pricingDate,
pe.priceClose,
pe.adjustmentFactor,
cc.countryId,
Row_number() OVER(PARTITION BY cc.companyId ORDER BY pe.pricingDate) RN
from ciqcompany cc
join ciqfinperiod cfp on cfp.companyid=cc.companyid
join ciqfininstance cfi on cfi.financialperiodid=cfp.financialperiodid
join ciqsecurity cs on cs.companyid = cc.companyid
join ciqtradingitem cti on cti.securityid=cs.securityid
join ciqPriceEquity pe on pe.tradingItemId=cti.tradingItemId
where pe.pricingDate >= '1974-12-31' and pe.pricingDate < '1975-02-01' and
cc.countryId = 213
) t
order by cc.companyId;
I removed the time component from the dates. It is not needed for the logic.