Compare two query

Please help me this issue…
I m working in Ms-Access 2003.

i make two query:

first query is given below:
eg. productcode cost n1
10001 10 2
10001 10 5
10001 30 7
10001 40 9
10001 50 1

second is given below:
eg. productcode cost n2
10001 10 11
10001 10 6
10001 30 7
10001 40 10
10001 50 2

my problem is when i join two query and run it give six rows [COLOR=“Red”]but i need five row :

eg. productcode cost n1 n2
10001 10 2 11
10001 10 5 6
10001 30 7 7
10001 40 9 10
10001 50 1 2

above result should come …

but i get more rows ,extra row of repeating cost 10.this is wrong.
productcode cost n1 n2
10001 10 2 11
10001 10 2 11
10001 10 5 6
10001 10 5 6
10001 30 7 7
10001 40 9 10
10001 50 1 2

there is no primary key required according to my query so i not put any primary to my tables.

please give me solution as soon as possible…

thanks in advance.

Can you post the SQL queries that you’re using (the SQL code)?

Tim

we have two table with same field .

First table is [COLOR=“Red”]productcode cost n1
eg. productcode cost n1
10001 10 2
10001 10 5
10001 30 7
10001 40 9
10001 50 1

second table is [COLOR=“Red”]productcode cost n2

eg. productcode cost n2
10001 10 11
10001 10 6
10001 30 7
10001 40 10
10001 50 2

my problem is when i join two table and run it give more rows but i need five row :

eg. productcode cost n1 n2
10001 10 2 11
10001 10 5 6
10001 30 7 7
10001 40 9 10
10001 50 1 2

Please tell me how to make query to give same result as above.