{"id":160279,"date":"2024-11-03T21:46:22","date_gmt":"2024-11-03T13:46:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160279\/"},"modified":"2024-11-03T21:46:23","modified_gmt":"2024-11-03T13:46:23","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-trunc","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160279\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase TRUNC"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-trunc-VZtBwxPPqM\">OceanBase \u6559\u7a0b\uff1aOceanBase TRUNC<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9752\u775e\u3002\u5b83\u4e0d\u50c5\u652f\u6301\u9ad8\u4e26\u767c\u7684\u8b80\u5beb\u64cd\u4f5c\uff0c\u9084\u5177\u5099\u826f\u597d\u7684\u64f4\u5c55\u6027\u548c\u5bb9\u932f\u80fd\u529b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684 TRUNC \u547d\u4ee4\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u7528\u6cd5\u53ca\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-trunc-%e5%91%bd%e4%bb%a4%ef%bc%9f-VZtBwxPPqM\">\u4ec0\u9ebc\u662f TRUNC \u547d\u4ee4\uff1f<\/h2>\n<p>TRUNC \u547d\u4ee4\u662f SQL \u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6307\u4ee4\uff0c\u7528\u65bc\u5feb\u901f\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\u3002\u8207 DELETE \u547d\u4ee4\u4e0d\u540c\uff0cTRUNC \u4e0d\u6703\u9010\u884c\u522a\u9664\u6578\u64da\uff0c\u800c\u662f\u76f4\u63a5\u91cb\u653e\u6574\u500b\u8868\u7684\u7a7a\u9593\uff0c\u9019\u4f7f\u5f97 TRUNC \u5728\u6027\u80fd\u4e0a\u66f4\u5177\u512a\u52e2\u3002<\/p>\n<h2 id=\"trunc-%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-VZtBwxPPqM\">TRUNC \u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>TRUNCATE TABLE table_name;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>table_name<\/code> \u662f\u4f60\u60f3\u8981\u6e05\u7a7a\u7684\u8868\u7684\u540d\u7a31\u3002\u4f7f\u7528 TRUNC \u547d\u4ee4\u5f8c\uff0c\u8868\u7684\u7d50\u69cb\u4ecd\u7136\u4fdd\u7559\uff0c\u4f46\u6240\u6709\u6578\u64da\u5c07\u88ab\u6c38\u4e45\u522a\u9664\uff0c\u7121\u6cd5\u6062\u5fa9\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-trunc-%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-VZtBwxPPqM\">\u4f7f\u7528 TRUNC \u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u7121\u6cd5\u6062\u5fa9\u6578\u64da\uff1a<\/strong>\u4f7f\u7528 TRUNC \u547d\u4ee4\u5f8c\uff0c\u6240\u6709\u6578\u64da\u5c07\u88ab\u6c38\u4e45\u522a\u9664\uff0c\u7121\u6cd5\u901a\u904e\u56de\u6efe\u64cd\u4f5c\u6062\u5fa9\u3002<\/li>\n<li><strong>\u7121\u6cd5\u4f7f\u7528 WHERE \u5b50\u53e5\uff1a<\/strong>TRUNC \u547d\u4ee4\u4e0d\u652f\u6301 WHERE \u5b50\u53e5\uff0c\u9019\u610f\u5473\u8457\u4f60\u7121\u6cd5\u9078\u64c7\u6027\u5730\u522a\u9664\u67d0\u4e9b\u884c\u3002<\/li>\n<li><strong>\u9700\u8981\u9069\u7576\u7684\u6b0a\u9650\uff1a<\/strong>\u57f7\u884c TRUNC \u547d\u4ee4\u9700\u8981\u76f8\u61c9\u7684\u6578\u64da\u5eab\u6b0a\u9650\uff0c\u901a\u5e38\u662f DROP \u6216 DELETE \u6b0a\u9650\u3002<\/li>\n<\/ul>\n<h2 id=\"trunc-%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-VZtBwxPPqM\">TRUNC \u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<p>TRUNC \u547d\u4ee4\u901a\u5e38\u7528\u65bc\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6e05\u7a7a\u6e2c\u8a66\u6578\u64da\uff1a<\/strong>\u5728\u958b\u767c\u548c\u6e2c\u8a66\u968e\u6bb5\uff0c\u958b\u767c\u8005\u7d93\u5e38\u9700\u8981\u6e05\u7a7a\u8868\u4e2d\u7684\u6578\u64da\u4ee5\u4fbf\u91cd\u65b0\u63d2\u5165\u65b0\u7684\u6e2c\u8a66\u6578\u64da\u3002<\/li>\n<li><strong>\u91cd\u7f6e\u8868\u72c0\u614b\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u91cd\u7f6e\u8868\u7684\u72c0\u614b\uff0c\u4f8b\u5982\u5728\u6578\u64da\u9077\u79fb\u6216\u6578\u64da\u6e05\u7406\u904e\u7a0b\u4e2d\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u7576\u9700\u8981\u5feb\u901f\u6e05\u7a7a\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528 TRUNC \u547d\u4ee4\u6bd4\u4f7f\u7528 DELETE \u66f4\u52a0\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"oceanbase-%e4%b8%ad%e7%9a%84-trunc-%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-VZtBwxPPqM\">OceanBase \u4e2d\u7684 TRUNC \u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5728 OceanBase \u4e2d\u4f7f\u7528 TRUNC \u547d\u4ee4\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba users \u7684\u8868\nTRUNCATE TABLE users;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c<code>users<\/code> \u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\u5c07\u88ab\u522a\u9664\uff0c\u4f46\u8868\u7684\u7d50\u69cb\u4ecd\u7136\u5b58\u5728\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-VZtBwxPPqM\">\u7d50\u8ad6<\/h2>\n<p>TRUNC \u547d\u4ee4\u5728 OceanBase \u4e2d\u662f\u4e00\u500b\u5f37\u5927\u4e14\u9ad8\u6548\u7684\u5de5\u5177\uff0c\u9069\u5408\u7528\u65bc\u9700\u8981\u5feb\u901f\u6e05\u7a7a\u8868\u6578\u64da\u7684\u5834\u666f\u3002\u96d6\u7136\u5b83\u7684\u4f7f\u7528\u76f8\u5c0d\u7c21\u55ae\uff0c\u4f46\u958b\u767c\u8005\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u8b39\u614e\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u4e1f\u5931\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d OceanBase \u6216\u5176\u4ed6\u6578\u64da\u5eab\u6280\u8853\u6709\u8208\u8da3\uff0c\u4e26\u5e0c\u671b\u7372\u5f97\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5eab\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u5982\u4f55\u4f7f\u7528 OceanBase TRUNC \u51fd\u6570\uff0c\u638c\u63e1\u6570\u636e\u622a\u65ad\u6280\u5de7\uff0c\u63d0\u5347\u6570\u636e\u5e93\u64cd\u4f5c\u6548\u7387\uff0c\u4f18\u5316\u6570\u636e\u7ba1\u7406\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-160279","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160279","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=160279"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160279\/revisions"}],"predecessor-version":[{"id":160280,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160279\/revisions\/160280"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}