{"id":82639,"date":"2024-10-16T21:01:24","date_gmt":"2024-10-16T13:01:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/82639\/"},"modified":"2024-10-16T21:01:24","modified_gmt":"2024-10-16T13:01:24","slug":"ora-01493-%e6%8c%87%e5%ae%9a%e7%9a%84-sample-%e5%a4%a7%e5%b0%8f%e7%84%a1%e6%95%88-oracle%e5%a0%b1%e9%8c%af%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/82639\/","title":{"rendered":"ORA-01493: \u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u7121\u6548 ORACLE\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-01493-%e6%8c%87%e5%ae%9a%e7%9a%84-sample-%e5%a4%a7%e5%b0%8f%e7%84%a1%e6%95%88-oracle%e5%a0%b1%e9%8c%af%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-YCVJUEHldS\">ORA-01493: \u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u7121\u6548 ORACLE\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f <code>ORA-01493<\/code>\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u57f7\u884c <code>DBMS_STATS.GATHER_TABLE_STATS<\/code> \u6216 <code>DBMS_STATS.GATHER_INDEX_STATS<\/code> \u7b49\u7d71\u8a08\u4fe1\u606f\u6536\u96c6\u64cd\u4f5c\u6642\uff0c\u63d0\u793a\u300c\u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u7121\u6548\u300d\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-YCVJUEHldS\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p><code>ORA-01493<\/code> \u932f\u8aa4\u7684\u4e3b\u8981\u539f\u56e0\u662f\u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u4e0d\u7b26\u5408 Oracle \u6578\u64da\u5eab\u7684\u8981\u6c42\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u4ee5\u4e0b\u5e7e\u500b\u56e0\u7d20\u9020\u6210\u7684\uff1a<\/p>\n<ul>\n<li><strong>SAMPLE \u5927\u5c0f\u904e\u5c0f\uff1a<\/strong>\u5982\u679c\u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u5c0f\u65bc 1\uff0cOracle \u5c07\u7121\u6cd5\u6709\u6548\u5730\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<li><strong>SAMPLE \u5927\u5c0f\u904e\u5927\uff1a<\/strong>\u5982\u679c SAMPLE \u5927\u5c0f\u8d85\u904e\u4e86\u8868\u4e2d\u8a18\u9304\u7684\u6578\u91cf\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4e0d\u6b63\u78ba\u7684 SAMPLE \u767e\u5206\u6bd4\uff1a<\/strong>\u5728\u4f7f\u7528\u767e\u5206\u6bd4\u9032\u884c SAMPLE \u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u8a72\u767e\u5206\u6bd4\u5728\u5408\u7406\u7bc4\u570d\u5167\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-YCVJUEHldS\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9 <code>ORA-01493<\/code> \u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5-sample-%e5%a4%a7%e5%b0%8f-YCVJUEHldS\">1. \u6aa2\u67e5 SAMPLE \u5927\u5c0f<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u6aa2\u67e5\u60a8\u5728\u57f7\u884c\u7d71\u8a08\u4fe1\u606f\u6536\u96c6\u6642\u6240\u6307\u5b9a\u7684 SAMPLE \u5927\u5c0f\u3002\u78ba\u4fdd\u5b83\u5728\u5408\u7406\u7bc4\u570d\u5167\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u6709\u4e00\u500b\u5305\u542b 1000 \u689d\u8a18\u9304\u7684\u8868\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u6536\u96c6\u7d71\u8a08\u4fe1\u606f\uff1a<\/p>\n<pre><code>BEGIN\n    DBMS_STATS.GATHER_TABLE_STATS(\n        ownname =&gt; 'YOUR_SCHEMA',\n        tabname =&gt; 'YOUR_TABLE',\n        estimate_percent =&gt; 10 -- \u9019\u88e1\u6307\u5b9a 10% \u7684 SAMPLE\n    );\nEND;\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%87%aa%e5%8b%95%e4%bc%b0%e7%ae%97-YCVJUEHldS\">2. \u4f7f\u7528\u81ea\u52d5\u4f30\u7b97<\/h3>\n<p>\u5982\u679c\u60a8\u4e0d\u78ba\u5b9a\u61c9\u8a72\u4f7f\u7528\u591a\u5c11 SAMPLE \u5927\u5c0f\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 Oracle \u7684\u81ea\u52d5\u4f30\u7b97\u529f\u80fd\u3002\u9019\u6a23\uff0cOracle \u5c07\u6839\u64da\u8868\u7684\u5927\u5c0f\u81ea\u52d5\u9078\u64c7\u5408\u9069\u7684 SAMPLE \u5927\u5c0f\uff1a<\/p>\n<pre><code>BEGIN\n    DBMS_STATS.GATHER_TABLE_STATS(\n        ownname =&gt; 'YOUR_SCHEMA',\n        tabname =&gt; 'YOUR_TABLE',\n        estimate_percent =&gt; NULL -- \u4f7f\u7528\u81ea\u52d5\u4f30\u7b97\n    );\nEND;\n<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e8%a1%a8%e7%9a%84%e8%a8%98%e9%8c%84%e6%95%b8-YCVJUEHldS\">3. \u6aa2\u67e5\u8868\u7684\u8a18\u9304\u6578<\/h3>\n<p>\u5728\u57f7\u884c\u7d71\u8a08\u4fe1\u606f\u6536\u96c6\u4e4b\u524d\uff0c\u6aa2\u67e5\u8868\u4e2d\u5be6\u969b\u7684\u8a18\u9304\u6578\u91cf\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u7372\u53d6\u8868\u7684\u8a18\u9304\u6578\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM YOUR_SCHEMA.YOUR_TABLE;\n<\/code><\/pre>\n<p>\u78ba\u4fdd SAMPLE \u5927\u5c0f\u4e0d\u8d85\u904e\u6b64\u8a18\u9304\u6578\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-YCVJUEHldS\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u907f\u514d\u672a\u4f86\u518d\u6b21\u51fa\u73fe <code>ORA-01493<\/code> \u932f\u8aa4\uff0c\u5efa\u8b70\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u78ba\u4fdd\u67e5\u8a62\u6027\u80fd\u6700\u4f73\u3002<\/li>\n<li>\u5728\u57f7\u884c\u7d71\u8a08\u4fe1\u606f\u6536\u96c6\u4e4b\u524d\uff0c\u4e86\u89e3\u8868\u7684\u7d50\u69cb\u548c\u6578\u64da\u91cf\u3002<\/li>\n<li>\u4f7f\u7528\u81ea\u52d5\u7d71\u8a08\u4fe1\u606f\u6536\u96c6\u529f\u80fd\uff0c\u6e1b\u5c11\u624b\u52d5\u64cd\u4f5c\u7684\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-YCVJUEHldS\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c<code>ORA-01493<\/code> \u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u4e0d\u6b63\u78ba\u7684 SAMPLE \u5927\u5c0f\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5 SAMPLE \u5927\u5c0f\u3001\u4f7f\u7528\u81ea\u52d5\u4f30\u7b97\u4ee5\u53ca\u78ba\u8a8d\u8868\u7684\u8a18\u9304\u6578\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u9075\u5faa\u6700\u4f73\u5be6\u8e10\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-01493 \u932f\u8aa4\uff0c\u7121\u6548\u7684 SAMPLE \u5927\u5c0f\u554f\u984c\uff0c\u63d0\u4f9b Oracle \u6545\u969c\u4fee\u5fa9\u7684\u9060\u7a0b\u8655\u7406\u6307\u5357\u8207\u6280\u5de7\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-82639","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/82639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=82639"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/82639\/revisions"}],"predecessor-version":[{"id":82640,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/82639\/revisions\/82640"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=82639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=82639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=82639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}