{"id":1061,"date":"2019-02-23T14:32:59","date_gmt":"2019-02-23T06:32:59","guid":{"rendered":"https:\/\/199604.com\/?p=1061"},"modified":"2019-02-23T14:37:16","modified_gmt":"2019-02-23T06:37:16","slug":"hive-oracle%e8%ae%a1%e7%ae%97%e5%a4%a9%e6%95%b0%e5%b7%ae","status":"publish","type":"post","link":"https:\/\/199604.com\/1061","title":{"rendered":"Hive\/ORACLE\u8ba1\u7b97\u5929\u6570\u5dee"},"content":{"rendered":"

Hive\u8ba1\u7b97\u5929\u6570\u65f6\u95f4\u5dee\uff0c\u6709\u5b98\u65b9\u5c01\u88c5\u597d\u7684datediff\u51fd\u6570.<\/p>\n

\u5728Hive\u4e0a\u8f93\u5165:desc function extended datediff;\u5373\u53ef\u67e5\u770b\u6b64\u51fd\u6570\u4ecb\u7ecd\u3002<\/p>\n\n\n

\"\"<\/div><\/figure>\n\n\n

OK
\ndatediff(date1, date2) – Returns the number of days between date1 and date2
\ndate1 and date2 are strings in the format ‘yyyy-MM-dd HH:mm:ss’ or ‘yyyy-MM-dd’. The time parts are ignored.If date1 is earlier than date2, the result is negative.
\nExample:
\n >> SELECT datediff(‘2009-07-30’, ‘2009-07-31’) FROM src LIMIT 1; >>\u7ed3\u679c\uff1a1<\/p>\n\n\n

\u4ece\u4e0a\u9762\u7684\u5b98\u65b9\u63cf\u8ff0\u53ef\u4ee5\u770b\u51fadatediff\u7528\u6cd5\u5f88\u7b80\u5355\uff0c\u5c31\u662fdatediff(‘\u65e5\u671f1′,’\u65e5\u671f2’)\uff0c\u5176\u4e2d\u65e5\u671f\u662f\u6709\u683c\u5f0f\u7684\uff0c\u76ee\u524d\u652f\u6301\u4ee5\u4e0b\u4e24\u79cd\u683c\u5f0f\uff1ayyyy-MM-dd HH:mm:ss\u3001yyyy-MM-dd<\/p>\n

\u4e3e\u4f8b\uff1a\u83b7\u53d6\u4e24\u4e2a\u65f6\u95f4\u4e4b\u95f4\u5dee\uff08day\uff09<\/p>\n\n

select datediff(‘2019-01-31′,’2019-01-20’) from test limit 1;
\n\/\/String\u8f6cdate\u7c7b\u578byyyy-mm-dd
\nselect datediff(from_unixtime(unix_timestamp(‘20190131′,’yyyymmdd’),’yyyy-mm-dd’),from_unixtime(unix_timestamp(‘20190101′,’yyyymmdd’),’yyyy-mm-dd’)) AS DCOUNT
\nfrom test limit 1;
\n\/\/\u5982\u4f55\u683c\u5f0f\u662fyyyy\/mm\/dd\u9700\u8981\u7528hive\u7684regexp_replace\u51fd\u6570\u8f6c\u6362
\nSELECT datediff(regexp_replace(‘2019\/01\/31’, “\/”, “-“),regexp_replace(‘2019\/01\/20’, “\/”, “-“)) FROM test LIMIT 1;<\/p>\n\n\n

\u5982\u679c\u4e0d\u8bb0\u5f97\u51fd\u6570\u7684\u4ecb\u7ecd\u7684\u8bdd\uff0c\u53ef\u4ee5\u591ashow functions,\u5b66\u4e60\u4e86\u89e3\u56de\u987e\u5404\u79cdhive function<\/p>\n

\n

Oracle\u8ba1\u7b97\u65f6\u95f4\u5dee<\/p>\n

\u83b7<\/p>\n

\u83b7\u53d6\u4e24\u65f6\u95f4\u7684\u76f8\u5dee\u8c6a\u79d2\u6570
select ceil((To_date(‘2019-01-30 00:00:00’ , ‘yyyy-mm-dd hh24-mi-ss’) – To_date(‘2019-01-01 23:59:59’ , ‘yyyy-mm-dd hh24-mi-ss’)) * 24 * 60 * 60 * 1000) \u76f8\u5dee\u8c6a\u79d2\u6570 FROM DUAL;<\/p>\n

\u83b7\u53d6\u4e24\u65f6\u95f4\u7684\u76f8\u5dee\u79d2\u6570
select ceil((To_date(‘2019-01-30 00:00:00’ , ‘yyyy-mm-dd hh24-mi-ss’) – To_date(‘2019-01-01 23:59:59’ , ‘yyyy-mm-dd hh24-mi-ss’)) * 24 * 60 * 60) \u76f8\u5dee\u79d2\u6570 FROM DUAL;<\/p>\n

\u83b7\u53d6\u4e24\u65f6\u95f4\u7684\u76f8\u5dee\u5206\u949f\u6570
select ceil(((To_date(‘2019-01-30 00:00:00’ , ‘yyyy-mm-dd hh24-mi-ss’) – To_date(‘2019-01-01 23:59:59’ , ‘yyyy-mm-dd hh24-mi-ss’))) * 24 * 60) \u76f8\u5dee\u5206\u949f\u6570 FROM DUAL;<\/p>\n

\u83b7\u53d6\u4e24\u65f6\u95f4\u7684\u76f8\u5dee\u5c0f\u65f6\u6570
select ceil((To_date(‘2019-01-30 00:00:00’ , ‘yyyy-mm-dd hh24-mi-ss’) – To_date(‘2019-01-01 23:59:59’ , ‘yyyy-mm-dd hh24-mi-ss’)) * 24) \u76f8\u5dee\u5c0f\u65f6\u6570 FROM DUAL;<\/p>\n

\u83b7\u53d6\u4e24\u65f6\u95f4\u7684\u76f8\u5dee\u5929\u6570
select ceil((To_date(‘2019-01-30 00:00:00’ , ‘yyyy-mm-dd hh24-mi-ss’) – To_date(‘2019-01-01 23:59:59’ , ‘yyyy-mm-dd hh24-mi-ss’))) \u76f8\u5dee\u5929\u6570 FROM DUAL;<\/p>\n

<\/div>
<\/div><\/p>","protected":false},"excerpt":{"rendered":"

Hive\u8ba1\u7b97\u5929\u6570\u65f6\u95f4\u5dee\uff0c\u6709\u5b98\u65b9\u5c01\u88c5\u597d\u7684datediff\u51fd\u6570. \u5728Hive\u4e0a\u8f93\u5165:desc function e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[179,181],"class_list":["post-1061","post","type-post","status-publish","format-standard","hentry","category-2","tag-hive","tag-oracle"],"_links":{"self":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1061","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/comments?post=1061"}],"version-history":[{"count":13,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1061\/revisions"}],"predecessor-version":[{"id":1078,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1061\/revisions\/1078"}],"wp:attachment":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/media?parent=1061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/categories?post=1061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/tags?post=1061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}