{"id":15851,"date":"2023-12-04T23:28:20","date_gmt":"2023-12-04T15:28:20","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15851"},"modified":"2023-12-04T23:32:51","modified_gmt":"2023-12-04T15:32:51","slug":"oracle-zhong-zhi-xing-truncate-ming-ling-hou-cun-c","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-zhi-xing-truncate-ming-ling-hou-cun-c\/","title":{"rendered":"Oracle \u4e2d\u6267\u884c TRUNCATE \u547d\u4ee4\u540e\uff0c\u5b58\u50a8\u7a7a\u95f4\u662f\u5426\u8fd8\u5b58\u5728\uff0c\u662f\u5426\u53ef\u88ab\u5176\u4ed6\u7684\u8868\u5360\u7528\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u6267\u884c TRUNCATE TABLE \u547d\u4ee4\u540e\uff0c\u8868\u4e2d\u7684\u6570\u636e\u4f1a\u88ab\u5220\u9664\uff0c\u4f46\u8868\u7684\u5b58\u50a8\u7ed3\u6784\u548c\u7a7a\u95f4\u4ecd\u7136\u5b58\u5728\u3002TRUNCATE TABLE \u662f\u4e00\u79cdDDL\uff08\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff09\u64cd\u4f5c\uff0c\u5b83\u4e0d\u4ec5\u5220\u9664\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e\uff0c\u8fd8\u5c06\u91ca\u653e\u8868\u6240\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u5c06\u8868\u6062\u590d\u4e3a\u65e0\u6570\u636e\u72b6\u6001\u3002<\/p>\n<p><strong>\u5b58\u50a8\u7a7a\u95f4\u662f\u5426\u8fd8\u5b58\u5728\uff1f<\/strong><\/p>\n<p>\u867d\u7136 TRUNCATE TABLE \u5220\u9664\u4e86\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e\uff0c\u4f46\u8868\u7684\u5b58\u50a8\u7ed3\u6784\uff08\u4f8b\u5982\u6bb5\u3001\u6247\u533a\u7b49\uff09\u4ecd\u7136\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\u3002\u8868\u7684\u5b58\u50a8\u7a7a\u95f4\u5728 TRUNCATE \u540e\u6ca1\u6709\u7acb\u5373\u91ca\u653e\uff0c\u800c\u662f\u5728\u540e\u7eed\u7684\u64cd\u4f5c\u4e2d\u7531 Oracle \u6570\u636e\u5e93\u8d1f\u8d23\u7ba1\u7406\u548c\u91ca\u653e\u3002<\/p>\n<p><strong>\u662f\u5426\u53ef\u88ab\u5176\u4ed6\u8868\u5360\u7528\uff1f<\/strong><\/p>\n<p>\u5728 TRUNCATE TABLE \u540e\uff0c\u8868\u7684\u5b58\u50a8\u7a7a\u95f4\u4ecd\u7136\u88ab\u4fdd\u7559\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u5176\u4ed6\u8868\u6216\u8be5\u8868\u7684\u672a\u6765\u6570\u636e\u5360\u7528\u3002\u5176\u4ed6\u8868\u53ef\u4ee5\u4f7f\u7528\u8be5\u8868\u5360\u7528\u7684\u7a7a\u95f4\uff0c\u800c TRUNCATE \u64cd\u4f5c\u5e76\u4e0d\u4f1a\u6539\u53d8\u8868\u7684\u5b58\u50a8\u7ed3\u6784\u6216\u91ca\u653e\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cTRUNCATE TABLE \u64cd\u4f5c\u662f\u975e\u5e38\u5feb\u901f\u548c\u6709\u6548\u7684\uff0c\u56e0\u4e3a\u5b83\u4e0d\u662f\u901a\u8fc7\u9010\u884c\u5220\u9664\u6570\u636e\u6765\u5b9e\u73b0\u7684\uff0c\u800c\u662f\u901a\u8fc7\u91ca\u653e\u8868\u7684\u6570\u636e\u5757\u6765\u5b8c\u6210\u3002\u8fd9\u4f7f\u5f97 TRUNCATE \u64cd\u4f5c\u76f8\u5bf9\u4e8e\u4f7f\u7528 DELETE \u547d\u4ee4\u5220\u9664\u5927\u91cf\u6570\u636e\u6765\u8bf4\u66f4\u4e3a\u9ad8\u6548\u3002<\/p>\n<p>\u5982\u679c\u4f60\u5e0c\u671b\u91ca\u653e TRUNCATE \u540e\u8868\u6240\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528 ALTER TABLE SHRINK SPACE \u547d\u4ee4\u3002\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u91ca\u653e\u8868\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u4f46\u9700\u8981\u6ce8\u610f\uff0c\u5b83\u53ef\u80fd\u9700\u8981\u8f83\u957f\u7684\u65f6\u95f4\uff0c\u5e76\u4e14\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u5f71\u54cd\u5176\u4ed6\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n<pre><code class=\"language-sql  line-numbers\">ALTER TABLE your_table SHRINK SPACE;\n<\/code><\/pre>\n<p>\u8bf7\u5728\u6267\u884c\u6b64\u7c7b\u64cd\u4f5c\u4e4b\u524d\u8fdb\u884c\u5145\u5206\u7684\u6d4b\u8bd5\uff0c\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u5bf9\u751f\u4ea7\u73af\u5883\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u6267\u884c TRUNCATE TABLE \u547d\u4ee4\u540e\uff0c\u8868\u4e2d\u7684\u6570\u636e\u4f1a\u88ab\u5220\u9664\uff0c\u4f46\u8868\u7684\u5b58\u50a8\u7ed3\u6784\u548c\u7a7a\u95f4\u4ecd\u7136 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15851","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15851"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15851\/revisions"}],"predecessor-version":[{"id":15852,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15851\/revisions\/15852"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15851"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}