{"id":1774,"date":"2022-09-27T11:29:49","date_gmt":"2022-09-27T03:29:49","guid":{"rendered":"http:\/\/www.821121.com\/?p=1774"},"modified":"2022-09-29T11:30:31","modified_gmt":"2022-09-29T03:30:31","slug":"23c%e6%96%b0%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1774","title":{"rendered":"23c\u65b0\u7279\u6027"},"content":{"rendered":"<p>\u5728\u6700\u8fd1\u521a\u521a\u4e3e\u884c\u7684 DOAG 2022 \u4f1a\u8bae\u4e0a\uff0cOracle \u62ab\u9732\u4e86 Oracle Database 23c \u7684\u4e00\u7cfb\u5217\u65b0\u7279\u6027\u3002\u4ee5\u4e0b\u6211\u5c06\u9074\u900910\u4e2a\u6709\u610f\u601d\u7684\u7279\u6027\uff0c\u51d1\u6210\u4e00\u7ec4\u901f\u89c8\u548c\u5927\u5bb6\u5206\u4eab\u3002<\/p>\n<h4>\uff081\uff09 \u4e0d\u5e26FROM\u5b50\u53e5\u7684SELECT \u67e5\u8be2<\/h4>\n<p>\u5728Oracle 23c \u4e2d\uff0c\u7b2c\u4e00\u6b21\u5b9e\u73b0\u4e86\u4e0d\u5e26From\u5b50\u53e5\u7684\u67e5\u8be2\uff0c\u51cf\u5c11\u539f\u6765\u5927\u91cf\u4f9d\u8d56Dual\u8868\u7684\u67e5\u8be2\uff0c\u53ef\u4ee5\u677e\u4e0b\u4e86\u4e00\u53e3\u6c14\uff1a<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6e6389ac-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>\uff082\uff09 \u5355\u8868\u652f\u63014096\u5217<\/h4>\n<p>\u6211\u4eec\u77e5\u9053 MogDB \u5355\u8868\u6700\u5927\u652f\u6301 1600\u5217\uff0cOracle\u6b64\u524d\u7248\u672c\u5355\u8868\u652f\u6301 1000\u5217\u3002<br \/>\n\u572823c\u4e2d\uff0c\u5355\u8868\u652f\u6301\u5217\u6570\u91cf\u6269\u5c55\u5230 4096 \u5217\u3002\u4e0d\u8fc7\u542f\u7528\u8fd9\u4e00\u4e2a\u7279\u6027\u9700\u8981\u5c06\u517c\u5bb9\u6027\u53c2\u6570\u8bbe\u7f6e\u4e3a23.0.0\uff0c\u540c\u65f6\u5c06 Max_columns\u8bbe\u7f6e\u4e3a Extended:<\/p>\n<pre><code class=\"language-shell\">alter system set MAX_COLUMNS=EXTENDED;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6e7a68d4-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(3) SCHEMA\u7ea7\u522b\u7684\u6743\u9650<\/h4>\n<p>\u572823c\u4e4b\u524d\u7684\u7248\u672c\uff0c\u5982\u679c\u9488\u5bf9Schema\u5bf9\u5176\u4ed6\u7528\u6237\u8fdb\u884c\u6388\u6743\uff0c\u9700\u8981\u901a\u8fc7\u7cfb\u7edf\u6743\u9650\u6216\u5bf9\u8c61\u6743\u9650\u5206\u522b\u663e\u5f0f\u5730\u6388\u4e88\uff0c\u8fd9\u5bf9\u6570\u636e\u5e93\u5e26\u6765\u4e86\u989d\u5916\u7684\u5b89\u5168\u98ce\u9669\u6216\u590d\u6742\u6027\u3002<br \/>\n\u5728Oracle 23\u4e2d\uff0c\u53ef\u4ee5\u5bf9Schema\u8fdb\u884c\u6388\u6743\uff0c\u7b80\u5316\u4e86\u4e4b\u524d\u7684\u6743\u9650\u64cd\u4f5c\u3002<\/p>\n<pre><code class=\"language-shell\">grant select any table on SCHMEA PROD to HR;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6e8d037c-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(4) Boolean\u6570\u636e\u7c7b\u578b<\/h4>\n<p>\u6700\u7ec8\uff0c\u5728Oracle Database 23c\u4e2d\uff0c\u5e03\u5c14\u6570\u636e\u7c7b\u578b\u88ab\u652f\u6301\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6e9cfeee-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(5) \u57fa\u4e8e\u522b\u540d\u7684GROUP BY<\/h4>\n<p>\u7ec8\u4e8e\uff0c\u6211\u4eec\u4e0d\u518d\u9700\u8981\u5728Group By\u4e2d\u91cd\u590d\u957f\u957f\u7684\u8868\u8fbe\u5f0f\uff0c\u73b0\u5728\u652f\u6301\u57fa\u4e8e\u522b\u540d\u3001\u4f4d\u7f6e\u7684GROUP BY\uff0c\u8fd9\u5927\u5927\u7b80\u5316\u4e86SQL\u6587\u672c\u548c\u7f16\u5199\uff0c\u6bd5\u7adfGroup by\u5982\u6b64\u5e38\u7528\u3001\u65e0\u5904\u4e0d\u5728\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6eb6103c-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(6) Javascript\u5b58\u50a8\u8fc7\u7a0b<\/h4>\n<p>\u5728Oracle 21c\u4e2d\u5f15\u5165\u7684MLE\u652f\u6301\u4e86\u6570\u636e\u5e93\u5185\u90e8\u7684Javascript \uff0c\u73b0\u5728\u66f4\u8fdb\u4e00\u6b65\uff0c23c\u5b9e\u73b0javascript\u5b58\u50a8\u8fc7\u7a0b\uff0c\u8ba9\u6570\u636e\u5e93\u5185\u7684\u5904\u7406\u80fd\u529b\u8fdb\u4e00\u6b65\u6269\u5c55\u548c\u589e\u5f3a\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6ec795aa-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(7) SQL Domains<\/h4>\n<p>SQL\u57df\uff0c\u57df\u662f\u7279\u5b9a\u7c7b\u578b\u6570\u636e\u5143\u7d20\u7684\u901a\u7528\u5b9a\u4e49\uff0c\u4f8b\u5982\u540d\u79f0\u3001\u90ae\u653f\u7f16\u7801\u3001\u56fd\u5bb6\u4ee3\u7801\u3002\u8fd9\u4e2a\u901a\u7528\u5b9a\u4e49\u53ef\u4ee5\u6709\u51e0\u4e2a\u5c5e\u6027\u2014\u2014\u4f8b\u5982\u683c\u5f0f\uff08\u68c0\u67e5\u7ea6\u675f\uff09\u3001\u9ed8\u8ba4\u503c\u3001\u9ed8\u8ba4\u663e\u793a\u683c\u5f0f\u548c\u6309\u57fa\u4e8e\u57df\u7684\u503c\u6392\u5e8f\u65f6\u8981\u4f7f\u7528\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n<p>\u5728Oracle Database 23c\u4e2d\uff0c\u57df\u53ef\u4ee5\u5b9a\u4e49\u4e3a\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5e76\u4e14\u5728\u5b9a\u4e49\u5217\u65f6\uff0c\u53ef\u4ee5\u5c06\u5176\u94fe\u63a5\u5230\u57df\u5b9a\u4e49\uff0c\u5f62\u6210\u4e00\u4e2a\u6f5c\u5728\u5143\u6570\u636e\u7ec4\u3002\u901a\u8fc7\u65b0\u51fd\u6570DOMAIN_DISPLAY\u548cDOMAIN_ORDER\u53ef\u4ee5\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528\u663e\u793a\u683c\u5f0f\u548c order by\u8868\u8fbe\u5f0f\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6eda857a-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(8) DDL\u7684IF EXISTS\u5224\u65ad<\/h4>\n<p>\u5728DDL\u4e2d\uff0c\u652f\u6301\u901a\u8fc7IF [NOT] EXISTS\u5224\u65ad\uff0c\u4ece\u800c\u89c4\u907f\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u9519\u8bef\u3001\u5f02\u5e38\u548c\u4e2d\u65ad\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6eeac1ba-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(9) \u6ce8\u91ca<\/h4>\n<p>\u6ce8\u91ca\uff0c\u4e3a\u6570\u636e\u5e93\u5bf9\u8c61\u589e\u52a0\u5143\u6570\u636e\u652f\u6301\uff0c\u53ef\u4ee5\u9488\u5bf9\u8868\u3001\u89c6\u56fe\u3001\u5217\u3001\u7d22\u5f15\u3001PL\/SQL \u7a0b\u5e8f\u5355\u5143\u3001\u7269\u5316\u89c6\u56fe\u3001\u57df\u589e\u52a0\u6ce8\u91ca\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/11\/modb_20220928_6efbaaca-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n<h4>(10) \u6807\u51c6\u7684\u8868\u503c\u6784\u5efa<\/h4>\n<p>\u4e00\u6b21\u4ea7\u751f\u591a\u884c\u8bb0\u5f55\uff0c\u662f\u57fa\u4e8eISO SQL\u6807\u51c6\u7684\u5b9e\u73b0\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/09\/modb_20220928_6f0a341e-3eca-11ed-87f6-38f9d3cd240d.png\" alt=\"\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u6700\u8fd1\u521a\u521a\u4e3e\u884c\u7684 DOAG 2022 \u4f1a\u8bae\u4e0a\uff0cOr<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[],"class_list":["post-1774","post","type-post","status-publish","format-standard","hentry","category--oracle-23c"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1774"}],"version-history":[{"count":2,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1774\/revisions"}],"predecessor-version":[{"id":1776,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1774\/revisions\/1776"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1774"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}