Q&A for community managers, administrators, and moderators
SELECT distinct u.id, t.tagname FROM posts p INNER JOIN posttags pt on pt.postid = p.parentid INNER JOIN users u on p.owneruserid = u.id INNER JOIN Tags t on t.id = pt.tagid WHERE p.posttypeid = 2 and (t.tagname = 'android' or t.tagname = 'css' or t.tagname = 'javascript' or t.tagname = 'mysql' or t.tagname = 'python' or t.tagname = 'java' or t.tagname = 'html5' or t.tagname = 'linux' or t.tagname = 'jquery') and u.reputation > 15 -- leaves us with the top quartile of the site and u.age > 18 /* be careful with tag names - all lower case lookup in Tags table */