Primary key and foreign key

I create two tables.

 

One is StockAmount (Name{primary key}, Amount) and the another one is StockPrice(ID{Primary key with autogenerated}, Name{foreign key with StockAmount table}, Price)

 

And then I store some data to

 

StockAmount.

-a     100

-b     200

-c     300

 

StockPrice 

-1     a     20000

-2     b     15000

-3     c      25000

 

And then I retrieve the data like this.

 

Select StockAmount.Name,StockAmount.Quantity,StockPrice.Price from StockAmount,StockPrice where StockAmount.Name='a'

 

The result comes out

a     100   20000

b     200   20000

c      300   20000

 

I want only one line like

a      100    20000.

 

Please solve my problem and reply to me. Thanks a lot for your help.