{"id":189016,"date":"2024-11-12T03:52:26","date_gmt":"2024-11-11T19:52:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189016\/"},"modified":"2024-11-12T03:52:28","modified_gmt":"2024-11-11T19:52:28","slug":"%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e5%ba%ab%e6%aa%a2%e7%b4%a2%e6%95%88%e7%8e%87%ef%bc%8c%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e8%aa%9e%e5%8f%a5%ef%bc%81-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%aa%a2%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189016\/","title":{"rendered":"\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\uff0c\u638c\u63e1\u6578\u64da\u8a9e\u53e5\uff01 (\u6578\u64da\u5eab\u6aa2\u7d22\u6578\u64da\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e5%ba%ab%e6%aa%a2%e7%b4%a2%e6%95%88%e7%8e%87%ef%bc%8c%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e8%aa%9e%e5%8f%a5%ef%bc%81-JzlDKvBmyV\">\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\uff0c\u638c\u63e1\u6578\u64da\u8a9e\u53e5\uff01<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6aa2\u7d22\u6548\u7387\u5c0d\u65bc\u4f01\u696d\u7684\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u3001\u793e\u4ea4\u5a92\u9ad4\u9084\u662f\u4f01\u696d\u5167\u90e8\u7cfb\u7d71\uff0c\u5feb\u901f\u800c\u6e96\u78ba\u7684\u6578\u64da\u6aa2\u7d22\u90fd\u80fd\u986f\u8457\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u548c\u696d\u52d9\u6c7a\u7b56\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\uff0c\u4e26\u6df1\u5165\u4e86\u89e3\u6578\u64da\u8a9e\u53e5\u7684\u4f7f\u7528\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%aa%a2%e7%b4%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-JzlDKvBmyV\">\u6578\u64da\u5eab\u6aa2\u7d22\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u6aa2\u7d22\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u6578\u64da\u7684\u904e\u7a0b\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u901a\u904e\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u4f86\u5be6\u73fe\u3002SQL\u662f\u4e00\u7a2e\u6a19\u6e96\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u80fd\u5920\u8b93\u7528\u6236\u4ee5\u7c21\u55ae\u7684\u8a9e\u6cd5\u4f86\u9032\u884c\u6578\u64da\u7684\u589e\u522a\u6539\u67e5\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e5%ba%ab%e6%aa%a2%e7%b4%a2%e6%95%88%e7%8e%87%e7%9a%84%e7%ad%96%e7%95%a5-JzlDKvBmyV\">\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\u7684\u7b56\u7565<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-JzlDKvBmyV\">1. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\u7684\u95dc\u9375\u3002\u901a\u904e\u5728\u6578\u64da\u8868\u7684\u67d0\u4e9b\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002\u7d22\u5f15\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u3002<\/p>\n<pre><code>CREATE INDEX idx_column_name ON table_name (column_name);<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u7684\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u5728\u8a2d\u8a08\u7d22\u5f15\u6642\u9700\u8981\u8b39\u614e\u8003\u91cf\u3002<\/p>\n<h3 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-JzlDKvBmyV\">2. \u512a\u5316\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<p>\u64b0\u5beb\u9ad8\u6548\u7684\u67e5\u8a62\u8a9e\u53e5\u662f\u63d0\u9ad8\u6aa2\u7d22\u6548\u7387\u7684\u53e6\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u7684\u6280\u5de7\uff1a<\/p>\n<ul>\n<li>\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\u3002<\/li>\n<li>\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62\uff0c\u56e0\u70baJOIN\u901a\u5e38\u80fd\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002<\/li>\n<li>\u5229\u7528WHERE\u5b50\u53e5\u904e\u6ffe\u4e0d\u5fc5\u8981\u7684\u6578\u64da\uff0c\u6e1b\u5c11\u8fd4\u56de\u7684\u884c\u6578\u3002<\/li>\n<\/ul>\n<pre><code>SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ba%ab-JzlDKvBmyV\">3. \u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab<\/h3>\n<p>\u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab\uff0c\u5982\u91cd\u5efa\u7d22\u5f15\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u53ef\u80fd\u6703\u4e0b\u964d\uff0c\u56e0\u6b64\u5b9a\u671f\u7684\u7dad\u8b77\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e8%aa%9e%e5%8f%a5%e7%9a%84%e4%bd%bf%e7%94%a8-JzlDKvBmyV\">\u6578\u64da\u8a9e\u53e5\u7684\u4f7f\u7528<\/h2>\n<p>\u6578\u64da\u8a9e\u53e5\u662f\u8207\u6578\u64da\u5eab\u4ea4\u4e92\u7684\u4e3b\u8981\u65b9\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6578\u64da\u8a9e\u53e5\u53ca\u5176\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-select-%e8%aa%9e%e5%8f%a5-JzlDKvBmyV\">1. SELECT \u8a9e\u53e5<\/h3>\n<p>SELECT\u8a9e\u53e5\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684SELECT\u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT name, age FROM users WHERE age &gt; 18;<\/code><\/pre>\n<h3 id=\"2-insert-%e8%aa%9e%e5%8f%a5-JzlDKvBmyV\">2. INSERT \u8a9e\u53e5<\/h3>\n<p>INSERT\u8a9e\u53e5\u7528\u65bc\u5411\u6578\u64da\u5eab\u4e2d\u63d2\u5165\u65b0\u6578\u64da\uff1a<\/p>\n<pre><code>INSERT INTO users (name, age) VALUES ('John Doe', 30);<\/code><\/pre>\n<h3 id=\"3-update-%e8%aa%9e%e5%8f%a5-JzlDKvBmyV\">3. UPDATE \u8a9e\u53e5<\/h3>\n<p>UPDATE\u8a9e\u53e5\u7528\u65bc\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u73fe\u6709\u6578\u64da\uff1a<\/p>\n<pre><code>UPDATE users SET age = 31 WHERE name = 'John Doe';<\/code><\/pre>\n<h3 id=\"4-delete-%e8%aa%9e%e5%8f%a5-JzlDKvBmyV\">4. DELETE \u8a9e\u53e5<\/h3>\n<p>DELETE\u8a9e\u53e5\u7528\u65bc\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE name = 'John Doe';<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-JzlDKvBmyV\">\u7d50\u8ad6<\/h2>\n<p>\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\u9700\u8981\u7d9c\u5408\u8003\u616e\u591a\u7a2e\u56e0\u7d20\uff0c\u5305\u62ec\u7d22\u5f15\u7684\u4f7f\u7528\u3001\u67e5\u8a62\u8a9e\u53e5\u7684\u512a\u5316\u4ee5\u53ca\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u3002\u638c\u63e1\u6578\u64da\u8a9e\u53e5\u7684\u4f7f\u7528\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6aa2\u7d22\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63d0\u9ad8\u6578\u64da\u5eab\u6aa2\u7d22\u6548\u7387\uff0c\u638c\u63e1\u95dc\u9375\u6578\u64da\u8a9e\u53e5\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u80fd\u529b\uff0c\u5be6\u73fe\u5feb\u901f\u6e96\u78ba\u7684\u4fe1\u606f\u6aa2\u7d22\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-189016","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189016","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=189016"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189016\/revisions"}],"predecessor-version":[{"id":189017,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189016\/revisions\/189017"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}