Join statement help in MySQL?

I have a table with 2 coloumns-
Rec ID
A 1
AB 1
A 2
A 3
A 4
AB 4


Now i want all those ID for rec A which is not in table for rec AB.

I am using following query for the same-

select ID from table where Rec='A' and ID not in (select ID from table where Rec='AB');
this sud give me result (2,3)

Can you please help me to write same query using join statement because my sql version is not compatible with sub query.

oh i think it is difficult







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