{"version":"1.0","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/shigemk2/","blog_title":"by shigemk2","title":"Presto approx_distinct","blog_url":"https://www.shigemk2.com/","author_name":"shigemk2","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F2019%2F10%2F07%2F210549\" title=\"Presto approx_distinct - by shigemk2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Java"],"image_url":null,"published":"2019-10-07 21:05:49","height":"190","url":"https://www.shigemk2.com/entry/2019/10/07/210549","description":"count(distinct x)\u306e\u6982\u7565\u7248\u3060\u3051\u3069\u3001count(x)\u306eapprox\u306f\u306a\u3044\u306e\u3060\u306d 6.14. Aggregate Functions \u2014 Presto 0.226 Documentation","width":"100%"}