{"id":2164,"date":"2015-03-19T21:30:50","date_gmt":"2015-03-19T13:30:50","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=2164"},"modified":"2015-03-19T21:30:50","modified_gmt":"2015-03-19T13:30:50","slug":"qdataset-%e5%8e%bb%e9%99%a4%e9%87%8d%e5%a4%8d%e8%ae%b0%e5%bd%95%e5%87%bd%e6%95%b0-distinct-%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=2164","title":{"rendered":"QDataSet \u53bb\u9664\u91cd\u590d\u8bb0\u5f55\u51fd\u6570 Distinct \u8bf4\u660e"},"content":{"rendered":"<p>QDataSet \u63d0\u4f9b\u4e86\u4e00\u4e2a\u53bb\u91cd\u51fd\u6570\uff0c\u540d\u4e3a Distinct\uff0c\u8be5\u51fd\u6570\u6ca1\u6709\u4efb\u4f55\u53c2\u6570\uff0c\u4e5f\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u5b83\u505a\u7528\u4e8e\u5f53\u524d\u6570\u636e\u96c6\uff0c\u7528\u4e8e\u5c06\u5f53\u524d\u6570\u636e\u96c6\u4e2d\u7684\u91cd\u590d\u8bb0\u5f55\u53bb\u6389\u3002<\/p>\n<p>\u6ce8\u610f\u76ee\u524d\u7248\u672c\u7684 Distinct \u5728\u4f7f\u7528\u65f6\uff0c\u5982\u679c\u6570\u636e\u96c6\u5185\u5bb9\u514b\u9686\u81ea\u5176\u5b83\u6570\u636e\u96c6\uff0cDistinct \u51fd\u6570\u5c06\u9996\u5148\u79fb\u9664\u4e0e\u514b\u9686\u6e90\u4e4b\u95f4\u7684\u6570\u636e\u5173\u8054\uff0c\u7136\u540e\u518d\u5bf9\u81ea\u8eab\u7684\u6570\u636e\u53bb\u91cd\u5904\u7406\u3002<\/p>\n<p>QDataSet \u7684Distinct \u6570\u636e\u53bb\u91cd\u65f6\uff0c\u4e0d\u4f1a\u6539\u53d8\u6570\u636e\u7684\u51fa\u73b0\u987a\u5e8f\u3002\u5b83\u59cb\u7ec8\u4fdd\u7559\u7b2c\u4e00\u6b21\u51fa\u73b0\u91cd\u590d\u503c\u7684\u8bb0\u5f55\u3002<\/p>\n<p><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/03\/DSDistinct.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2165\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/03\/DSDistinct.gif\" alt=\"DSDistinct\" width=\"730\" height=\"396\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>QDataSet \u63d0\u4f9b\u4e86\u4e00\u4e2a\u53bb\u91cd\u51fd\u6570\uff0c\u540d [&hellip;]<\/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":[8],"tags":[],"class_list":["post-2164","post","type-post","status-publish","format-standard","hentry","category-delphi"],"views":4796,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2164","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=2164"}],"version-history":[{"count":1,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2164\/revisions"}],"predecessor-version":[{"id":2166,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2164\/revisions\/2166"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}