mysql join 2 tables in same column

Question

I've create PHP website that have 2 tables in one database, 2 to type of users first is editor user (c) and normal user (b)

the first table (irp_members)

username - email - phone - usertype - parea

the second table (irp_mem_papers)

username - email - phone - pcountry - fname - pauthor - parea

i try to do mysql join if user is logged in and his type is editor (c) then create mysql join get any record from second table (irp_mem_papers) where parea field from first table (irp_members) is same parea field in second table (irp_mem_papers)

mysql code is

SELECT irp_members.parea, irp_mem_papers.pauthor,irp_mem_papers.phone, irp_members.username
FROM irp_mem_papers 
WHERE irp_members.username = $_SESSION[username]
INNER JOIN irp_mem_papers 
ON irp_members.parea=irp_mem_papers.parea

what i mean was if the field in irp_members.parea and irp_mem_papers.parea are equal in value (for example they both need to be biology

Answer 1

i'm not sure, if the semantics of the query was correct, but the syntax must be like this (WHERE clause goes after JOIN and ON):

SELECT irp_members.parea, irp_mem_papers.pauthor,irp_mem_papers.phone, 
irp_members.username
FROM irp_members 
INNER JOIN irp_mem_papers 
ON irp_members.parea=irp_mem_papers.parea
WHERE irp_members.username = $_SESSION[username]