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At this point you should probably download an ebook on those subjects, and then download an RDBMS express version and learn everything yourself.
I doubt an app alone will enrich you with enough working knowledge on each of those subjects. Also PL-SQL is specific to a subset of RDBMS (e.g Oracle, and maybe IBM DB2), others have similar counterpart procedural languages, but very different syntax.
Google is probably your best friend here :)
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