Can Data Explorer do those things? For example:
Search all of the questions which have the only tag of the particular tag
Search all of the questions which have the particular tag(s) but haven't the particular tag(s)
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Yes, see Recent questions with only one tag . It actually returns all questions with the given tag as the only tag, with most recent first.
This is easier to do with the built-in search. Precede the undesired tags with
-. For example, you can search for[abstract-algebra] [polynomials] -[homework] -[group-theory]
to get all questions questions tagged abstract-algebra and polynomials but neither homework nor group-theory.
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$\begingroup$ Thank you very much! For data.stackexchange.com/mathematics/query/152366, I am really very interested to see how does the coding principle so that it can perform by so simple coding. $\endgroup$ Dec 8, 2013 at 5:21
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$\begingroup$ @doraemonpaul The short explanation: SQL is magic. Seriously: there are SQL tutorials online, one is w3schools, where you can play with simple tables within the tutorial. $\endgroup$ Dec 8, 2013 at 5:43