{"id":638,"date":"2014-09-17T15:06:40","date_gmt":"2014-09-17T07:06:40","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=638"},"modified":"2014-09-17T15:06:40","modified_gmt":"2014-09-17T07:06:40","slug":"qdataset%e5%b0%86%e5%a2%9e%e5%8a%a0%e5%af%b9%e6%9c%ac%e5%9c%b0%e5%94%af%e4%b8%80%e5%80%bc%e6%a3%80%e6%9f%a5%e3%80%81%e9%bb%98%e8%ae%a4%e5%80%bc%e3%80%81%e8%be%b9%e7%95%8c%e4%b8%89%e7%a7%8d%e7%ba%a6","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=638","title":{"rendered":"QDataset\u5c06\u589e\u52a0\u5bf9\u672c\u5730\u552f\u4e00\u503c\u68c0\u67e5\u3001\u9ed8\u8ba4\u503c\u3001\u8fb9\u754c\u4e09\u79cd\u7ea6\u675f\u89c4\u5219\u68c0\u67e5"},"content":{"rendered":"<p>TQDataSet\u4f5c\u4e3aQDB\u4e2d\u5185\u5b58\u8868\u7684\u6838\u5fc3\u7c7b\uff0c\u5b83\u5c06\u52a0\u5165\u4e09\u79cd\u672c\u5730\u7ea6\u675f\u89c4\u5219\uff0c\u4ee5\u4fbf\u4e3a\u5927\u5bb6\u63d0\u4f9b\u4e00\u4e2a\u66f4\u6613\u7528\u7684\u53ef\u89c6\u5316\u4e1a\u52a1\u903b\u8f91\u68c0\u67e5\u73af\u5883\uff1a<\/p>\n<p>1\u3001\u552f\u4e00\u503c\u68c0\u67e5<\/p>\n<p>\u552f\u4e00\u503c\u68c0\u67e5\u7ea6\u675f\u7528\u4e8e\u4fdd\u8bc1\u67d0\u4e00\u5217\u6216\u51e0\u5217\u503c\u7684\u7ec4\u5408\u7684\u552f\u4e00\u6027\u3002<\/p>\n<p>\u552f\u4e00\u503c\u68c0\u67e5\u7ea6\u675f\u65f6\uff0c\u5e94\u8bbe\u7f6eExpression\u5c5e\u6027\u4e3a\u5b57\u6bb5\u540d\u7684\u7ec4\u5408\uff0c\u591a\u4e2a\u5b57\u6bb5\u4e4b\u95f4\u7528\u201c,\u201d\u5206\u9694\uff0c\u5982\uff1a<\/p>\n<pre class=\"lang:pgsql decode:true \">Id,ParentId<\/pre>\n<p>2\u3001\u9ed8\u8ba4\u503c<\/p>\n<p>\u9ed8\u8ba4\u503c\u7ea6\u675f\u7528\u6765\u4e3a\u975e\u7a7a\u7684\u6570\u636e\u5217\uff0c\u5728\u672a\u8f93\u5165\u503c\u7684\u60c5\u51b5\u4e0b\u4e3a\u5176\u4f9b\u9ed8\u8ba4\u503c\u3002<\/p>\n<p>\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u7ea6\u675f\u65f6\uff0c\u5e94\u8bbe\u7f6eExpression\u5c5e\u6027\u4e3a\u9ed8\u8ba4\u503c\u7684\u8868\u8fbe\u5f0f\uff0c\u683c\u5f0f\u4e3a\u5b57\u6bb5\u540d=\u8868\u8fbe\u5f0f\u5b57\u7b26\u4e32\uff0c\u591a\u4e2a\u5b57\u6bb5\u9ed8\u8ba4\u503c\u8868\u8fbe\u5f0f\u4e4b\u95f4\u7528\u201c,\u201d\u5206\u9694\uff0c\u5982\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">Id=\"NextVal('Seq_Id')\",Age=0<\/pre>\n<p>3\u3001\u8303\u56f4\u68c0\u67e5<\/p>\n<p>\u8303\u56f4\u68c0\u67e5\u7ea6\u675f\u7528\u4e8e\u5728\u63d2\u5165\u6216\u4fee\u6539\u503c\u65f6\uff0c\u5bf9\u6570\u636e\u5185\u5bb9\u8fdb\u884c\u68c0\u67e5\uff0c\u4ee5\u907f\u514d\u8d85\u8fc7\u5141\u8bb8\u7684\u8303\u56f4\u3002<\/p>\n<p>\u8bbe\u7f6e\u8303\u56f4\u68c0\u67e5\u7ea6\u675f\u65f6\uff0c\u5e94\u8bbe\u7f6eExpression\u5c5e\u6027\u4e3a\u4e00\u4e2a\u53ef\u4ee5\u5f97\u5230\u5e03\u5c14\u503c\u7684\u8868\u8fbe\u5f0f\uff0c\u5982\u679c\u8fd4\u56de\u503c\u4e3a\u771f\uff0c\u5219\u6570\u636e\u88ab\u63a5\u53d7\uff0c\u5426\u5219\uff0c\u5c06\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u4e0b\u9762\u662f\u8868\u8fbe\u5f0f\u7684\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<pre class=\"lang:delphi decode:true\">(Age&gt;15) and (Age&lt;65) and (Sex=1)<\/pre>\n<p>\u6ce8\u610f\uff0c\u8303\u56f4\u68c0\u67e5\u7ea6\u675f\u65f6\uff0c\u5b57\u6bb5\u5fc5\u9700\u662f\u5f53\u524d\u6570\u636e\u96c6\u5bf9\u8c61\uff0c\u5c06\u6765\u53ef\u80fd\u6269\u5c55\u652f\u6301\u8bbf\u95ee\u5176\u5b83\u6570\u636e\u96c6\u7684\u5b57\u6bb5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TQDataSet\u4f5c\u4e3aQDB\u4e2d\u5185\u5b58\u8868\u7684\u6838 [&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 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8,9],"tags":[454,68,67],"class_list":["post-638","post","type-post","status-publish","format-standard","hentry","category-delphi","category-qdac","tag-qdb","tag-tqlocalcheck","tag-67"],"views":2804,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/638","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=638"}],"version-history":[{"count":1,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/638\/revisions"}],"predecessor-version":[{"id":641,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/638\/revisions\/641"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}