ambiguous outer joins

[John thomas]

I am trying to lean how to do queries,But every time i run one .Acces says
i have anbiguous outer joins .Does this mean i have joined my tables incorrectly

 

[AccessMSSQL]

You need to post your query syntax please?

 

[John thomas]

Thanks for the answer .But i dont know what you mean .I am very new to access .What is query syntax?