ofcourse u can

No we cant create table with out primary key. primary key 
is must.

no.with out primary key we can't create table.must and 
should we assign one primary key in table.with out primary 
key it is possible in structure.

of course we can create without primary key because system 
automatic create internal index key.

No we cannot, not at all, its not possible,
Because I have tried it out and its not possible either by 
using dataelements or Build-in types directly,

IF THERE IS A WAYOUT PLEASE ENHANCE OUR KNOWLWDGE

yes.if you not use this table in foreign key relationship 
we can.
so that the primary key is not must for all the 
situation.without primary key we can create table.

if you create a ztable and you dont give primary key during 
activation you will get the error as 'specify a primary key'