How to delete from table in case code type have value or not

Question

How to delete from table in case of code type have value ?

I have temp table #temppc

I need when codetype on temp table #tempPc not have null meaning have value

then

delete statement from table Parts.TradeCodes will be

DELETE TCC FROM #TempPC t INNER JOIN Parts.TradeCodes TCC ON t.ZPLID=TCC.ZPLID and t.CodeType=TCC.codeType

and if codetype on temp table #TempPc is null then delete statment from table Parts.TradeCodes will not have codetype

and it will be

DELETE TCC FROM #TempPC t INNER JOIN Parts.TradeCodes TCC ON t.ZPLID=TCC.ZPLID

so How to modify delete statment on query below that to delete based on two cases if codetype have value or not

create table #TempPC
(
[ID] INT IDENTITY,
ZPLID INT,
CodeType int

)




DELETE TCC FROM #TempPC t INNER JOIN Parts.TradeCodes TCC ON t.ZPLID=TCC.ZPLID