{"id":168437,"date":"2024-11-06T12:22:30","date_gmt":"2024-11-06T04:22:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168437\/"},"modified":"2024-11-06T12:22:30","modified_gmt":"2024-11-06T04:22:30","slug":"sql-%e8%aa%9e%e5%8f%a5%ef%bc%9a%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b%e7%9a%84%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168437\/","title":{"rendered":"SQL \u8a9e\u53e5\uff1a\u4fee\u6539\u5b57\u6bb5\u985e\u578b (\u6578\u64da\u5eab\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u7684\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"sql-%e8%aa%9e%e5%8f%a5%ef%bc%9a%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b%e7%9a%84%e8%aa%9e%e5%8f%a5-sqLWbBrYkP\">SQL \u8a9e\u53e5\uff1a\u4fee\u6539\u5b57\u6bb5\u985e\u578b (\u6578\u64da\u5eab\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u7684\u8a9e\u53e5)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u662f\u4e00\u9805\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u6578\u64da\u7684\u5b58\u5132\u9700\u6c42\u4e5f\u53ef\u80fd\u6703\u96a8\u4e4b\u6539\u8b8a\uff0c\u56e0\u6b64\u9700\u8981\u5c0d\u73fe\u6709\u7684\u6578\u64da\u8868\u9032\u884c\u8abf\u6574\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u4fee\u6539\u5b57\u6bb5\u985e\u578b\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b%ef%bc%9f-sqLWbBrYkP\">\u70ba\u4ec0\u9ebc\u9700\u8981\u4fee\u6539\u5b57\u6bb5\u985e\u578b\uff1f<\/h2>\n<p>\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u7684\u539f\u56e0\u6709\u5f88\u591a\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u9700\u6c42\u8b8a\u66f4\uff1a<\/strong>\u96a8\u8457\u696d\u52d9\u7684\u767c\u5c55\uff0c\u53ef\u80fd\u9700\u8981\u5b58\u5132\u66f4\u5927\u7684\u6578\u64da\u91cf\uff0c\u4f8b\u5982\u5c07\u6574\u6578\u985e\u578b\u6539\u70ba\u9577\u6574\u6578\u985e\u578b\u3002<\/li>\n<li><strong>\u6578\u64da\u683c\u5f0f\u8abf\u6574\uff1a<\/strong>\u6709\u6642\u5019\uff0c\u6578\u64da\u7684\u683c\u5f0f\u9700\u8981\u8abf\u6574\uff0c\u4f8b\u5982\u5c07\u5b57\u7b26\u4e32\u985e\u578b\u6539\u70ba\u65e5\u671f\u985e\u578b\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u67d0\u4e9b\u6578\u64da\u985e\u578b\u5728\u67e5\u8a62\u6642\u6027\u80fd\u66f4\u4f73\uff0c\u53ef\u80fd\u9700\u8981\u6839\u64da\u67e5\u8a62\u9700\u6c42\u9032\u884c\u8abf\u6574\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b-sqLWbBrYkP\">\u5982\u4f55\u4fee\u6539\u5b57\u6bb5\u985e\u578b<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u901a\u5e38\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY COLUMN \u5217\u540d \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u9019\u88e1\u7684 <code>\u8868\u540d<\/code> \u662f\u4f60\u8981\u4fee\u6539\u7684\u6578\u64da\u8868\u7684\u540d\u7a31\uff0c<code>\u5217\u540d<\/code> \u662f\u4f60\u8981\u4fee\u6539\u7684\u5b57\u6bb5\u540d\u7a31\uff0c\u800c <code>\u65b0\u6578\u64da\u985e\u578b<\/code> \u5247\u662f\u4f60\u5e0c\u671b\u5c07\u8a72\u5b57\u6bb5\u66f4\u6539\u70ba\u7684\u6578\u64da\u985e\u578b\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-sqLWbBrYkP\">\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u8a72\u8868\u4e2d\u6709\u4e00\u500b\u540d\u70ba <code>age<\/code> \u7684\u5b57\u6bb5\uff0c\u539f\u672c\u7684\u6578\u64da\u985e\u578b\u662f <code>INT<\/code>\uff0c\u73fe\u5728\u6211\u5011\u5e0c\u671b\u5c07\u5176\u4fee\u6539\u70ba <code>BIGINT<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY COLUMN age BIGINT;<\/code><\/pre>\n<p>\u9019\u6a23\u5c31\u5c07 <code>age<\/code> \u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u5f9e <code>INT<\/code> \u4fee\u6539\u70ba <code>BIGINT<\/code>\u3002<\/p>\n<h3 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-sqLWbBrYkP\">\u6ce8\u610f\u4e8b\u9805<\/h3>\n<p>\u5728\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u517c\u5bb9\u6027\uff1a<\/strong>\u5728\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u4e4b\u524d\uff0c\u78ba\u4fdd\u73fe\u6709\u6578\u64da\u80fd\u5920\u517c\u5bb9\u65b0\u7684\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c07 <code>VARCHAR<\/code> \u4fee\u6539\u70ba <code>INT<\/code> \u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u9396\u5b9a\uff1a<\/strong>\u5728\u57f7\u884c <code>ALTER TABLE<\/code> \u64cd\u4f5c\u6642\uff0c\u6578\u64da\u5eab\u53ef\u80fd\u6703\u9396\u5b9a\u8a72\u8868\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u5176\u4ed6\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u7d50\u69cb\u6027\u8b8a\u66f4\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u60c5\u6cc1\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-sqLWbBrYkP\">\u7d50\u8ad6<\/h2>\n<p>\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u662f\u4e00\u9805\u91cd\u8981\u7684\u6578\u64da\u5eab\u7ba1\u7406\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u4f01\u696d\u6839\u64da\u9700\u6c42\u8abf\u6574\u6578\u64da\u7d50\u69cb\u3002\u901a\u904e\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\uff0c\u7ba1\u7406\u54e1\u53ef\u4ee5\u9748\u6d3b\u5730\u5c0d\u6578\u64da\u8868\u9032\u884c\u8abf\u6574\u3002\u7136\u800c\uff0c\u5728\u9032\u884c\u9019\u4e9b\u64cd\u4f5c\u6642\uff0c\u5fc5\u9808\u8b39\u614e\u8003\u616e\u6578\u64da\u517c\u5bb9\u6027\u548c\u6027\u80fd\u5f71\u97ff\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u548c\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u660e\u667a\u7684\u9078\u64c7\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u90fd\u80fd\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u5b57\u6bb5\u7684\u985e\u578b\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u7d50\u69cb\u7684\u9748\u6d3b\u6027\u8207\u6e96\u78ba\u6027\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-168437","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168437","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=168437"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168437\/revisions"}],"predecessor-version":[{"id":168438,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168437\/revisions\/168438"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}