Is it valid to use DISTINCT two times in a single query - mysql

Question

I'm getting this following error:
MYSQL ERROR
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use
near 'DISTINCT R.roomtype as roomtype , I1.meal_plan as
mealplan , I1.`bed_t' at line 3
My Code is
SELECT
DISTINCT H.`hotelname` as `hotelname` ,
DISTINCT R.`roomtype` as `roomtype` ,
I1.`meal_plan` as `mealplan` ,
I1.`bed_type` as `bedtype` ,
I1.`roomrate` as `roomrate` ,
I1.`pax` as `pax` ,
I1.`childrate` as `childrate` ,
I1.`childrate1` as `childrate1` ,
I1.`childrate2` as `childrate2` ,
I1.`childrate3` as `childrate3` ,
P.`profitmarkup_type` as `profit_type` ,
P.`applyprofit_val_room` as `applyprofit_val_room` ,
P.`applyprofit_val_bed` as `applyprofit_val_bed`
FROM `hoteldetails` H
INNER JOIN `roomdetails` R
on H.`hotelname` = R.`hotelname`
INNER JOIN `inventorypolicy` I1
on I1.`hotel_name` = H.`hotelname`
AND I1.`room_plan` = R.`roomtype`
AND I1.`bed_type`=R.`bedtype`
AND I1.`meal_plan`=R.`mealplan`
AND I1.`suppliername`=H.`supplier`
INNER JOIN `profitmarkup` P
on P.`hotel_name` = H.`hotelname`
AND P.`suppliername` = H.`supplier`
WHERE H.`active`='1'
AND H.`country`='MAL'
AND H.`city`='KL'
AND H.`show2web`='1'
AND H.`expiry_date` >= 11/09/2014
AND I1.`inventory_status`='1'
AND P.`markup_status` = '1'
AND 20140911 BETWEEN ((I1.`date1`)+(I1.`month1`*100)+(I1.`year1`*10000)) AND ((I1.`date2`)+(I1.`month2`*100)+(I1.`year2`*10000))
AND 20140911 BETWEEN ((P.`date1`)+(P.`month1`*100)+(P.`year1`*10000)) AND ((P.`date2`)+(P.`month2`*100)+(P.`year2`*10000))
I dont know how to fix this. Any help is greatly appreciated.

Answer 1

As you can learn from the documentation of the SELECT MySQL statement, DISTINCT can be placed before any field or expression to be selected. This automatically forces a single instance of it in a query.
And somewhere down the road there is a sentence that says everything:
DISTINCTROW is a synonym for DISTINCT.