{"id":63,"date":"2014-08-24T00:18:07","date_gmt":"2014-08-23T16:18:07","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=63"},"modified":"2014-08-24T00:18:07","modified_gmt":"2014-08-23T16:18:07","slug":"postgresql-%e8%ae%a1%e7%ae%97%e6%8c%87%e5%ae%9a%e6%97%b6%e9%97%b4%e6%89%80%e5%9c%a8%e5%91%a8%e7%9a%84%e5%bc%80%e5%a7%8b%e4%b8%8e%e7%bb%93%e6%9d%9f%e6%97%a5%e6%9c%9f","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=63","title":{"rendered":"PostgreSQL-\u8ba1\u7b97\u6307\u5b9a\u65f6\u95f4\u6240\u5728\u5468\u7684\u5f00\u59cb\u4e0e\u7ed3\u675f\u65e5\u671f"},"content":{"rendered":"

\u00a0 \u00a0 \u6709\u65f6\u5019\uff0c\u6211\u4eec\u77e5\u9053\u4e00\u5468\u7684\u67d0\u4e00\u5929\uff0c\u4f46\u9700\u8981\u8fd9\u5468\u8d77\u59cb\u662f\u90a3\u4e00\u5929\uff0c\u7ed3\u675f\u662f\u90a3\u4e00\u5929\u3002\u5728PostgreSQL\u53ca\u7edd\u5927\u591a\u6570\u8bed\u8a00\u4e2d\uff0c\u90fd\u6ca1\u6709\u63d0\u4f9b\u8fd9\u4e48\u4e00\u4e2a\u51fd\u6570\uff0c\u4e5f\u8bb8\u662f\u7528\u7684\u4eba\u5c11\u5427\uff0c\u6bd5\u7adf\u4e00\u822c\u7684\u7edf\u8ba1\u62a5\u8868\u90fd\u662f\u65e5\u62a5\u3001\u6708\u62a5\u3001\u5b63\u62a5\u6216\u5e74\u62a5\uff0c\u5468\u62a5\u76f8\u5bf9\u8f83\u5c11\u3002<\/p>\n

\u00a0 \u00a0 \u6211\u5199\u4e86\u4e24\u4e2a\u8ba1\u7b97\u6307\u5b9a\u65e5\u671f\u6240\u5728\u5468\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u65e5\u671f\u7684\u51fd\u6570\uff0c\u5206\u4eab\u7ed9\u5927\u5bb6\u3002<\/p>\n

\u00a0 \u00a0 1\u3001WeekStartDate \u8ba1\u7b97\u4e00\u5468\u5f00\u59cb\u65e5\u671f\uff0c\u65f6\u95f4\u4e3a0\u70b9<\/p>\n

CREATE\u00a0OR\u00a0REPLACE\u00a0FUNCTION\u00a0weekstartdate(adate\u00a0timestamp\u00a0without\u00a0time\u00a0zone)\r\n\u00a0\u00a0RETURNS\u00a0timestamp\u00a0without\u00a0time\u00a0zone\u00a0AS\r\n$BODY$\r\nbegin\r\nADate=date_trunc('day',ADate);--\u5f3a\u5236\u65f6\u95f4\u6e05\u96f6\r\nADate=ADate-(cast(extract(dow\u00a0from\u00a0ADate)-1\u00a0as\u00a0character\u00a0varying)||'d')::interval;\r\nreturn\u00a0ADate;\r\nend;\r\n$BODY$\r\n\u00a0\u00a0LANGUAGE plpgsql IMMUTABLE STRICT;<\/pre>\n
2\u3001WeekEndDate \u8ba1\u7b97\u4e00\u5468\u7684\u7ed3\u675f\u65e5\u671f\uff0c\u7ed3\u679c\u4e3a\u4e0b\u5468\u4e00\u76840\u70b9<\/p>\n
CREATE\u00a0OR\u00a0REPLACE\u00a0FUNCTION\u00a0weekenddate(adate\u00a0timestamp\u00a0without\u00a0time\u00a0zone)\r\n\u00a0\u00a0RETURNS\u00a0timestamp\u00a0without\u00a0time\u00a0zone\u00a0AS\r\n$BODY$\r\nbegin\r\nADate=date_trunc('day',ADate);--\u5f3a\u5236\u65f6\u95f4\u6e05\u96f6\r\nADate=ADate+(cast(8-extract(dow\u00a0from\u00a0ADate)\u00a0as\u00a0character\u00a0varying)||'d')::interval;\r\nreturn\u00a0ADate;\r\nend;\r\n$BODY$\r\n\u00a0\u00a0LANGUAGE plpgsql IMMUTABLE STRICT;<\/pre>\n
\u4e0a\u4e2a\u5b9e\u9645\u8fd0\u884c\u6548\u679c\u56fe\uff1a<\/p>\n
\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
\u00a0 \u00a0 \u6709\u65f6\u5019\uff0c\u6211\u4eec\u77e5\u9053\u4e00\u5468\u7684\u67d0\u4e00\u5929\uff0c\u4f46 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[],"class_list":["post-63","post","type-post","status-publish","format-standard","hentry","category-pgsql"],"views":4585,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/63","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=63"}],"version-history":[{"count":2,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/63\/revisions"}],"predecessor-version":[{"id":65,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/63\/revisions\/65"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=63"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=63"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=63"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}