{"id":76376,"date":"2024-10-16T06:09:14","date_gmt":"2024-10-15T22:09:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76376\/"},"modified":"2024-10-16T06:09:14","modified_gmt":"2024-10-15T22:09:14","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%absql%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76376\/","title":{"rendered":"MySQL\u6578\u64da\u5eabSQL\u8a9e\u53e5\u7684\u6b63\u78ba\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e5%ba%absql%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95-mEOuFAYcVT\">MySQL\u6578\u64da\u5eabSQL\u8a9e\u53e5\u7684\u6b63\u78ba\u7528\u6cd5<\/h1>\n<p>MySQL\u662f\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7db2\u7ad9\u548c\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u8207MySQL\u4ea4\u4e92\u7684\u4e3b\u8981\u8a9e\u8a00\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u6578\u64da\u5eab\u4e2dSQL\u8a9e\u53e5\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%acsql%e8%aa%9e%e5%8f%a5-mEOuFAYcVT\">\u57fa\u672cSQL\u8a9e\u53e5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u6700\u5e38\u7528\u7684SQL\u8a9e\u53e5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>SELECT<\/strong>\uff1a\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><strong>INSERT<\/strong>\uff1a\u7528\u65bc\u63d2\u5165\u65b0\u6578\u64da\u3002<\/li>\n<li><strong>UPDATE<\/strong>\uff1a\u7528\u65bc\u66f4\u65b0\u73fe\u6709\u6578\u64da\u3002<\/li>\n<li><strong>DELETE<\/strong>\uff1a\u7528\u65bc\u522a\u9664\u6578\u64da\u3002<\/li>\n<\/ul>\n<h3 id=\"1-select%e8%aa%9e%e5%8f%a5-mEOuFAYcVT\">1. SELECT\u8a9e\u53e5<\/h3>\n<p>SELECT\u8a9e\u53e5\u662f\u7528\u4f86\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u7684\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5f9e\u540d\u70ba\u201cusers\u201d\u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\uff1a<\/p>\n<pre><code>SELECT name, email FROM users;<\/code><\/pre>\n<h3 id=\"2-insert%e8%aa%9e%e5%8f%a5-mEOuFAYcVT\">2. INSERT\u8a9e\u53e5<\/h3>\n<p>INSERT\u8a9e\u53e5\u7528\u65bc\u5411\u8868\u4e2d\u6dfb\u52a0\u65b0\u8a18\u9304\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSERT INTO table_name (column1, column2) VALUES (value1, value2);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5411\u201cusers\u201d\u8868\u4e2d\u63d2\u5165\u4e00\u500b\u65b0\u7528\u6236\uff1a<\/p>\n<pre><code>INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com');<\/code><\/pre>\n<h3 id=\"3-update%e8%aa%9e%e5%8f%a5-mEOuFAYcVT\">3. UPDATE\u8a9e\u53e5<\/h3>\n<p>UPDATE\u8a9e\u53e5\u7528\u65bc\u4fee\u6539\u73fe\u6709\u8a18\u9304\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE table_name SET column1 = value1 WHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u66f4\u65b0\u201cusers\u201d\u8868\u4e2d\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\uff1a<\/p>\n<pre><code>UPDATE users SET email = 'john.doe@example.com' WHERE name = 'John Doe';<\/code><\/pre>\n<h3 id=\"4-delete%e8%aa%9e%e5%8f%a5-mEOuFAYcVT\">4. DELETE\u8a9e\u53e5<\/h3>\n<p>DELETE\u8a9e\u53e5\u7528\u65bc\u522a\u9664\u8a18\u9304\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM table_name WHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5f9e\u201cusers\u201d\u8868\u4e2d\u522a\u9664\u4e00\u500b\u7528\u6236\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE name = 'John Doe';<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e5%92%8c%e9%81%8e%e6%bf%be-mEOuFAYcVT\">\u4f7f\u7528\u689d\u4ef6\u548c\u904e\u6ffe<\/h2>\n<p>\u5728SQL\u8a9e\u53e5\u4e2d\uff0c\u4f7f\u7528\u689d\u4ef6\u53ef\u4ee5\u5e6b\u52a9\u904e\u6ffe\u6578\u64da\u3002WHERE\u5b50\u53e5\u662f\u7528\u4f86\u6307\u5b9a\u689d\u4ef6\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u9078\u64c7\u6240\u6709\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e6%8e%92%e5%ba%8f%e5%92%8c%e5%88%86%e7%b5%84-mEOuFAYcVT\">\u6392\u5e8f\u548c\u5206\u7d44<\/h2>\n<p>\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\uff0c\u4f7f\u7528ORDER BY\u5b50\u53e5\u53ef\u4ee5\u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff0c\u800cGROUP BY\u5b50\u53e5\u5247\u7528\u65bc\u5206\u7d44\u6578\u64da\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM users GROUP BY age;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u6839\u64da\u5e74\u9f61\u5c0d\u7528\u6236\u9032\u884c\u5206\u7d44\u4e26\u8a08\u7b97\u6bcf\u7d44\u7684\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-mEOuFAYcVT\">\u7d50\u8ad6<\/h2>\n<p>\u638c\u63e1MySQL\u7684SQL\u8a9e\u53e5\u662f\u6578\u64da\u5eab\u7ba1\u7406\u7684\u57fa\u790e\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528SELECT\u3001INSERT\u3001UPDATE\u548cDELETE\u7b49\u8a9e\u53e5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u96a8\u8457\u5c0dSQL\u8a9e\u8a00\u7684\u6df1\u5165\u7406\u89e3\uff0c\u958b\u767c\u8005\u80fd\u5920\u66f4\u9748\u6d3b\u5730\u8655\u7406\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u5b89\u5168\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6578\u64da\u5eab\u4e2dSQL\u8a9e\u53e5\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\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-76376","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76376","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=76376"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76376\/revisions"}],"predecessor-version":[{"id":76377,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76376\/revisions\/76377"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}