{"id":76032,"date":"2024-10-16T03:17:13","date_gmt":"2024-10-15T19:17:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76032\/"},"modified":"2024-10-16T03:17:14","modified_gmt":"2024-10-15T19:17:14","slug":"mysql-%e7%b0%a1%e5%96%ae%e6%93%8d%e4%bd%9c%e4%b9%8b%e7%94%a8update%e5%92%8cdelete%e4%be%86%e4%bf%ae%e6%94%b9%e5%92%8c%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76032\/","title":{"rendered":"MySQL \u7c21\u55ae\u64cd\u4f5c\u4e4b\u7528UPDATE\u548cDELETE\u4f86\u4fee\u6539\u548c\u522a\u9664\u6578\u64da"},"content":{"rendered":"<h1 id=\"mysql-%e7%b0%a1%e5%96%ae%e6%93%8d%e4%bd%9c%e4%b9%8b%e7%94%a8update%e5%92%8cdelete%e4%be%86%e4%bf%ae%e6%94%b9%e5%92%8c%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-ytPinRUCyK\">MySQL \u7c21\u55ae\u64cd\u4f5c\u4e4b\u7528UPDATE\u548cDELETE\u4f86\u4fee\u6539\u548c\u522a\u9664\u6578\u64da<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u975e\u5e38\u6d41\u884c\u7684\u9078\u64c7\uff0c\u56e0\u70ba\u5b83\u7684\u9748\u6d3b\u6027\u548c\u6613\u7528\u6027\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 MySQL \u7684 <code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u8a9e\u53e5\u4f86\u4fee\u6539\u548c\u522a\u9664\u6578\u64da\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-update-%e8%aa%9e%e5%8f%a5%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a-ytPinRUCyK\">\u4f7f\u7528 UPDATE \u8a9e\u53e5\u4fee\u6539\u6578\u64da<\/h2>\n<p><code>UPDATE<\/code> \u8a9e\u53e5\u7528\u65bc\u4fee\u6539\u6578\u64da\u8868\u4e2d\u7684\u73fe\u6709\u8a18\u9304\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>SET<\/code> \u7528\u65bc\u6307\u5b9a\u8981\u4fee\u6539\u7684\u5217\u53ca\u5176\u65b0\u503c\uff0c\u800c <code>WHERE<\/code> \u5b50\u53e5\u5247\u7528\u65bc\u6307\u5b9a\u54ea\u4e9b\u8a18\u9304\u9700\u8981\u88ab\u66f4\u65b0\u3002\u82e5\u4e0d\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5247\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-ytPinRUCyK\">\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u6578\u64da\uff1a<\/p>\n<pre><code>+----+-------+--------+\n| ID | Name  | Salary |\n+----+-------+--------+\n| 1  | John  | 5000   |\n| 2  | Alice | 6000   |\n| 3  | Bob   | 5500   |\n+----+-------+--------+<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u5c07 Alice \u7684\u85aa\u6c34\u66f4\u65b0\u70ba 6500\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE employees\nSET Salary = 6500\nWHERE Name = 'Alice';<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0c<code>employees<\/code> \u8868\u7684\u6578\u64da\u5c07\u8b8a\u70ba\uff1a<\/p>\n<pre><code>+----+-------+--------+\n| ID | Name  | Salary |\n+----+-------+--------+\n| 1  | John  | 5000   |\n| 2  | Alice | 6500   |\n| 3  | Bob   | 5500   |\n+----+-------+--------+<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8-delete-%e8%aa%9e%e5%8f%a5%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-ytPinRUCyK\">\u4f7f\u7528 DELETE \u8a9e\u53e5\u522a\u9664\u6578\u64da<\/h2>\n<p><code>DELETE<\/code> \u8a9e\u53e5\u7528\u65bc\u522a\u9664\u6578\u64da\u8868\u4e2d\u7684\u8a18\u9304\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u540c\u6a23\u5730\uff0c<code>WHERE<\/code> \u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u8981\u522a\u9664\u7684\u8a18\u9304\u3002\u5982\u679c\u4e0d\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5247\u6574\u500b\u8868\u7684\u6578\u64da\u90fd\u6703\u88ab\u522a\u9664\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-ytPinRUCyK\">\u7bc4\u4f8b<\/h3>\n<p>\u7e7c\u7e8c\u4f7f\u7528\u4e0a\u9762\u7684 <code>employees<\/code> \u8868\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u522a\u9664 Bob \u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM employees\nWHERE Name = 'Bob';<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0c<code>employees<\/code> \u8868\u7684\u6578\u64da\u5c07\u8b8a\u70ba\uff1a<\/p>\n<pre><code>+----+-------+--------+\n| ID | Name  | Salary |\n+----+-------+--------+\n| 1  | John  | 5000   |\n| 2  | Alice | 6500   |\n+----+-------+--------+<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ytPinRUCyK\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u57f7\u884c <code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u6216\u4fee\u6539\u3002<\/li>\n<li>\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u6642\u8981\u7279\u5225\u5c0f\u5fc3\uff0c\u78ba\u4fdd\u689d\u4ef6\u6b63\u78ba\uff0c\u4ee5\u514d\u5f71\u97ff\u4e0d\u5fc5\u8981\u7684\u8a18\u9304\u3002<\/li>\n<li>\u53ef\u4ee5\u4f7f\u7528 <code>SELECT<\/code> \u8a9e\u53e5\u5148\u67e5\u8a62\u8981\u4fee\u6539\u6216\u522a\u9664\u7684\u8a18\u9304\uff0c\u4ee5\u78ba\u8a8d\u64cd\u4f5c\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ytPinRUCyK\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86 MySQL \u4e2d\u7684 <code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u8a9e\u53e5\uff0c\u9019\u4e9b\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u57fa\u672c\u64cd\u4f5c\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u9019\u4e9b\u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528MySQL\u7684UPDATE\u548cDELETE\u8a9e\u53e5\u7c21\u55ae\u5730\u4fee\u6539\u548c\u522a\u9664\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-76032","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76032","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=76032"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76032\/revisions"}],"predecessor-version":[{"id":76033,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76032\/revisions\/76033"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}