Q&A for professional and enthusiast programmers
select u.Location, t.TagName, count(*) cnt from Posts q JOIN PostTags pt ON q.Id = pt.PostId JOIN Tags t ON pt.TagId = t.Id JOIN Users u ON u.id = q.OwnerUserId where t.TagName = 'amazon-web-services' and ( lower(u.Location) like '%vietnam%' or lower(u.Location) like '%viet nam%' or lower(u.Location) like '%singapore%' or lower(u.Location) like '%indonesia%' ) and q.CreationDate >= '2019-01-01' group by u.Location, t.TagName order by cnt desc