{"id":143839,"date":"2024-11-01T01:41:20","date_gmt":"2024-10-31T17:41:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143839\/"},"modified":"2024-11-01T01:41:21","modified_gmt":"2024-10-31T17:41:21","slug":"sql-%e6%8a%80%e5%b7%a7%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%82%99%e4%bb%bd%e6%93%8d%e4%bd%9c-%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143839\/","title":{"rendered":"SQL \u6280\u5de7\uff1a\u6578\u64da\u5eab\u8868\u5099\u4efd\u64cd\u4f5c (\u7528 sql \u8a9e\u53e5\u5099\u4efd\u6578\u64da\u5eab\u8868)"},"content":{"rendered":"<h1 id=\"sql-%e6%8a%80%e5%b7%a7%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%82%99%e4%bb%bd%e6%93%8d%e4%bd%9c-%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-JKAfOHfIPx\">SQL \u6280\u5de7\uff1a\u6578\u64da\u5eab\u8868\u5099\u4efd\u64cd\u4f5c (\u7528 SQL \u8a9e\u53e5\u5099\u4efd\u6578\u64da\u5eab\u8868)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5099\u4efd\u662f\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u6578\u64da\u640d\u58de\u3001\u610f\u5916\u522a\u9664\u9084\u662f\u7cfb\u7d71\u6545\u969c\uff0c\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\u8868\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5feb\u901f\u6062\u5fa9\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u9032\u884c\u6578\u64da\u5eab\u8868\u7684\u5099\u4efd\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%ef%bc%9f-JKAfOHfIPx\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5099\u4efd\u6578\u64da\u5eab\u8868\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u8868\u7684\u5099\u4efd\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\uff0c\u4e26\u78ba\u4fdd\u696d\u52d9\u7684\u9023\u7e8c\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5099\u4efd\u7684\u4e3b\u8981\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u4fdd\u8b77\uff1a<\/strong>\u9632\u6b62\u56e0\u610f\u5916\u522a\u9664\u6216\u6578\u64da\u640d\u58de\u800c\u5c0e\u81f4\u7684\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u7cfb\u7d71\u6062\u5fa9\uff1a<\/strong>\u5728\u7cfb\u7d71\u6545\u969c\u6216\u707d\u96e3\u767c\u751f\u5f8c\uff0c\u80fd\u5920\u5feb\u901f\u6062\u5fa9\u696d\u52d9\u904b\u884c\u3002<\/li>\n<li><strong>\u7248\u672c\u63a7\u5236\uff1a<\/strong>\u53ef\u4ee5\u4fdd\u7559\u6578\u64da\u7684\u6b77\u53f2\u7248\u672c\uff0c\u4fbf\u65bc\u8ffd\u8e64\u548c\u5be9\u8a08\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-JKAfOHfIPx\">\u4f7f\u7528 SQL \u8a9e\u53e5\u5099\u4efd\u6578\u64da\u5eab\u8868<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u5099\u4efd\u6578\u64da\u5eab\u8868\u7684\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528 <code>CREATE TABLE<\/code> \u8a9e\u53e5\u4f86\u5275\u5efa\u4e00\u500b\u65b0\u7684\u8868\uff0c\u7136\u5f8c\u4f7f\u7528 <code>INSERT INTO<\/code> \u8a9e\u53e5\u5c07\u539f\u8868\u7684\u6578\u64da\u8907\u88fd\u5230\u65b0\u8868\u4e2d\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u7684\u64cd\u4f5c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-1%ef%bc%9a%e5%89%b5%e5%bb%ba%e5%82%99%e4%bb%bd%e8%a1%a8-JKAfOHfIPx\">\u6b65\u9a5f 1\uff1a\u5275\u5efa\u5099\u4efd\u8868<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u8207\u539f\u8868\u7d50\u69cb\u76f8\u540c\u7684\u5099\u4efd\u8868\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u5275\u5efa\u5099\u4efd\u8868\uff1a<\/p>\n<pre><code>CREATE TABLE employees_backup AS SELECT * FROM employees WHERE 1=0;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u6703\u5275\u5efa\u4e00\u500b\u540d\u70ba <code>employees_backup<\/code> \u7684\u65b0\u8868\uff0c\u4e26\u4e14\u5176\u7d50\u69cb\u8207 <code>employees<\/code> \u8868\u76f8\u540c\uff0c\u4f46\u4e0d\u6703\u8907\u88fd\u4efb\u4f55\u6578\u64da\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-2%ef%bc%9a%e5%b0%87%e6%95%b8%e6%93%9a%e6%8f%92%e5%85%a5%e5%82%99%e4%bb%bd%e8%a1%a8-JKAfOHfIPx\">\u6b65\u9a5f 2\uff1a\u5c07\u6578\u64da\u63d2\u5165\u5099\u4efd\u8868<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>INSERT INTO<\/code> \u8a9e\u53e5\u5c07\u539f\u8868\u7684\u6578\u64da\u8907\u88fd\u5230\u5099\u4efd\u8868\u4e2d\uff1a<\/p>\n<pre><code>INSERT INTO employees_backup SELECT * FROM employees;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6240\u6709\u7684\u6578\u64da\u5c07\u88ab\u8907\u88fd\u5230 <code>employees_backup<\/code> \u8868\u4e2d\uff0c\u5b8c\u6210\u5099\u4efd\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e5%ae%9a%e6%9c%9f%e5%82%99%e4%bb%bd%e7%9a%84%e8%87%aa%e5%8b%95%e5%8c%96-JKAfOHfIPx\">\u5b9a\u671f\u5099\u4efd\u7684\u81ea\u52d5\u5316<\/h2>\n<p>\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\uff0c\u5efa\u8b70\u5b9a\u671f\u9032\u884c\u5099\u4efd\u3002\u53ef\u4ee5\u4f7f\u7528\u8a08\u5283\u4efb\u52d9\u6216\u6578\u64da\u5eab\u7684\u4e8b\u4ef6\u8abf\u5ea6\u529f\u80fd\u4f86\u81ea\u52d5\u57f7\u884c\u5099\u4efd\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e8b\u4ef6\u8abf\u5ea6\u5668\u4f86\u5b9a\u671f\u57f7\u884c\u5099\u4efd\uff1a<\/p>\n<pre><code>CREATE EVENT backup_employees\nON SCHEDULE EVERY 1 DAY\nDO\nBEGIN\n    CREATE TABLE employees_backup AS SELECT * FROM employees WHERE 1=0;\n    INSERT INTO employees_backup SELECT * FROM employees;\nEND;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6bcf\u5929\u90fd\u6703\u81ea\u52d5\u5099\u4efd <code>employees<\/code> \u8868\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-JKAfOHfIPx\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u8868\u5099\u4efd\u6642\uff0c\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6709\u8db3\u5920\u7684\u5b58\u5132\u7a7a\u9593\u4f86\u4fdd\u5b58\u5099\u4efd\u8868\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u5099\u4efd\u7684\u5b8c\u6574\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u53ef\u4ee5\u6b63\u78ba\u6062\u5fa9\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u58d3\u7e2e\u6280\u8853\u4f86\u6e1b\u5c11\u5099\u4efd\u6587\u4ef6\u7684\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-JKAfOHfIPx\">\u7e3d\u7d50<\/h2>\n<p>\u5099\u4efd\u6578\u64da\u5eab\u8868\u662f\u6578\u64da\u7ba1\u7406\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528 SQL \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5275\u5efa\u5099\u4efd\u8868\u4e26\u5c07\u6578\u64da\u8907\u88fd\u5230\u5176\u4e2d\u3002\u5b9a\u671f\u5099\u4efd\u4e0d\u50c5\u80fd\u4fdd\u8b77\u6578\u64da\uff0c\u9084\u80fd\u63d0\u9ad8\u696d\u52d9\u7684\u7a69\u5b9a\u6027\u3002\u82e5\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \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>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u5099\u4efd\u6578\u64da\u5eab\u8868\uff0c\u638c\u63e1\u5be6\u7528\u6280\u5de7\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u8207\u5b8c\u6574\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-143839","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143839","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=143839"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143839\/revisions"}],"predecessor-version":[{"id":143840,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143839\/revisions\/143840"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}