Searching for lecture

Hi group, I'm currently searching for lecture about SQL in general. There are a lot of books. But all of them, at least those I had a look into, are far too explanatory for me. I mean they introduce some conecept, construct or language feature by presenting an example, which it is applied to and leave you allone. That is not really the stuff I can deal with. The other way round is much easier for me I think.
Are there any books, web sites or other sources out there with a more formal look on SQL?

Thanks in advance

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	Robert...