Get the URL of SE site the query is run against. Please note: if you need to link a page from the currently selected site use the 'site://' protocol instead (check the following: http://meta.stackoverflow.com/q/127204/158912)
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SELECT 'http://google.com/?hl=en&q=Test' [NotEncoded], 'http://google.com/?hl=en&q=Test' [Encoded], 'http://google.com/?hl=en&q=Test%7CAnother' [WithVerticalLine]