Excludes tags that have been synonymized with another tag.
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SELECT t.TagName, CONCAT('https://stackoverflow.com/q/', ex.Id) AS Link, ex.Body, wiki.Body, ts.Id FROM Tags t JOIN Posts ex ON ex.Id = t.ExcerptPostId JOIN Posts wiki ON wiki.Id = t.WikiPostId LEFT JOIN TagSynonyms ts ON ts.SourceTagName = t.TagName WHERE t.TagName LIKE '%##TagName?json##%' AND ts.Id IS NULL