{"id":51,"date":"2026-03-22T08:55:00","date_gmt":"2026-03-22T00:55:00","guid":{"rendered":"https:\/\/www.deartester.com\/?p=51"},"modified":"2026-06-14T13:34:13","modified_gmt":"2026-06-14T05:34:13","slug":"%e6%b5%8b%e8%af%95%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%bf%85%e9%a1%bb%e6%8e%8c%e6%8f%a1%e7%9a%84sql%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/www.deartester.com\/index.php\/2026\/03\/22\/%e6%b5%8b%e8%af%95%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%bf%85%e9%a1%bb%e6%8e%8c%e6%8f%a1%e7%9a%84sql%e6%8a%80%e5%b7%a7\/","title":{"rendered":"\u6d4b\u8bd5\u5de5\u7a0b\u5e08\u5fc5\u987b\u638c\u63e1\u7684SQL\u6280\u5de7"},"content":{"rendered":"<div class=\"wp-block-post-author-name\">\u6d4b\u8bd5\u738b\u540c\u5b66<\/div>\n\n<div class=\"wp-block-post-date\"><time datetime=\"2026-03-22T08:55:00+08:00\">2026\u5e743\u670822\u65e5<\/time><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u5404\u4f4d\u6d4b\u8bd5\u5c0f\u4f19\u4f34\u4eec\uff0c\u4eca\u5929\u60f3\u548c\u5927\u5bb6\u804a\u804a\u4e00\u4e2a&#8221;\u8001\u751f\u5e38\u8c08&#8221;\u4f46\u53c8\u7279\u522b\u91cd\u8981\u7684\u8bdd\u9898\u2014\u2014SQL\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u80fd\u6709\u540c\u5b66\u4f1a\u60f3\uff1a\u6211\u662f\u4e00\u4e2a\u529f\u80fd\u6d4b\u8bd5\u5de5\u7a0b\u5e08\uff0c\u53c8\u4e0d\u5199\u4ee3\u7801\uff0c\u6bcf\u5929\u70b9\u70b9\u70b9\u5c31\u591f\u4e86\uff0c\u5b66\u4ec0\u4e48SQL\u554a\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u522b\u6025\uff0c\u8ba9\u6211\u5148\u7ed9\u4f60\u8bb2\u4e2a\u6545\u4e8b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u4e2a\u771f\u5b9e\u7684&#8221;\u4e8b\u6545&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53bb\u5e74\u6211\u4eec\u56e2\u961f\u6709\u4e2a\u5c0f\u4f19\u4f34\uff0c\u8d1f\u8d23\u4e00\u4e2a\u8ba2\u5355\u6a21\u5757\u7684\u9a8c\u6536\u6d4b\u8bd5\u3002\u6d4b\u8bd5\u73af\u5883\u4e0a\u7ebf\u540e\uff0c\u4e00\u5207\u770b\u8d77\u6765\u5f88\u6b63\u5e38\uff0c\u76f4\u5230\u6709\u4e00\u5929\u2014\u2014<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd0\u8425\u7a81\u7136\u53d1\u73b0\uff1a\u67091000\u591a\u4e2a\u8ba2\u5355\u7684\u72b6\u6001\u663e\u793a&#8221;\u5df2\u652f\u4ed8&#8221;\uff0c\u4f46\u5b9e\u9645\u4e0a\u7528\u6237\u6839\u672c\u6ca1\u4ed8\u6b3e\uff01<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u67e5\u4e86\u4e00\u6574\u5929\uff0c\u6700\u540e\u53d1\u73b0\u662f\u5f00\u53d1\u5728\u6539\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u4e0d\u5c0f\u5fc3\u628a\u652f\u4ed8\u72b6\u6001\u5b57\u6bb5\u7684\u9ed8\u8ba4\u503c\u4ece&#8221;\u672a\u652f\u4ed8&#8221;\u6539\u6210\u4e86&#8221;\u5df2\u652f\u4ed8&#8221;\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8fd9\u4f4d\u6d4b\u8bd5\u5c0f\u4f19\u4f34\u4f1aSQL\uff0c\u53ea\u8981\u5728\u63d0\u6d4b\u524d\u8dd1\u4e00\u6761\u67e5\u8be2\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT status, COUNT(*) FROM orders GROUP BY status;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c31\u80fd\u7acb\u523b\u53d1\u73b0\u6570\u636e\u5206\u5e03\u5f02\u5e38\uff0c\u53ca\u65f6\u62e6\u622a\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u554a\uff0c<strong>SQL\u4e0d\u662f\u7a0b\u5e8f\u5458\u7684\u4e13\u5229\uff0c\u800c\u662f\u6d4b\u8bd5\u5de5\u7a0b\u5e08\u7684&#8221;\u900f\u89c6\u773c&#8221;<\/strong>\u3002\u5b83\u80fd\u5e2e\u6211\u4eec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5feb\u901f\u4e86\u89e3\u6570\u636e\u5e93\u7ed3\u6784<\/li>\n\n\n\n<li>\u9a8c\u8bc1\u6570\u636e\u7684\u6b63\u786e\u6027<\/li>\n\n\n\n<li>\u6784\u9020\u5404\u79cd\u6d4b\u8bd5\u6570\u636e<\/li>\n\n\n\n<li>\u5b9a\u4f4d\u95ee\u9898\u6839\u56e0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u5929\uff0c\u6211\u5c31\u628a\u81ea\u5df1\u65e5\u5e38\u5de5\u4f5c\u4e2d\u6700\u5e38\u7528\u76845\u4e2aSQL\u6280\u5de7\u6574\u7406\u51fa\u6765\uff0c\u5168\u90e8\u662f\u5b9e\u6218\u5e72\u8d27\uff0c\u5efa\u8bae\u6536\u85cf\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001information_schema\uff1a\u6478\u6e05\u6570\u636e\u5e93&#8221;\u5bb6\u5e95&#8221;<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u62ff\u5230\u4e00\u4e2a\u65b0\u9879\u76ee\uff0c\u9762\u5bf9\u51e0\u5341\u4e0a\u767e\u5f20\u8868\uff0c\u5b8c\u5168\u4e0d\u77e5\u9053\u4ece\u54ea\u4e0b\u624b\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u65f6\u5019\u5c31\u8981\u7528\u5230<strong>information_schema<\/strong>\u8fd9\u4e2a&#8221;\u6570\u636e\u5e93\u5730\u56fe&#8221;\u4e86\u3002\u5b83\u5b58\u50a8\u4e86\u6240\u6709\u8868\u7684\u5143\u6570\u636e\uff0c\u76f8\u5f53\u4e8e\u6570\u636e\u5e93\u7684&#8221;\u6237\u53e3\u672c&#8221;\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\uff1a\u63a5\u624b\u65b0\u9879\u76ee\uff0c\u60f3\u5feb\u901f\u4e86\u89e3\u8868\u7ed3\u6784<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u60f3\u770b\u770b\u67d0\u4e2a\u6570\u636e\u5e93\u91cc\u6709\u54ea\u4e9b\u8868\uff1f\u8868\u91cc\u6709\u54ea\u4e9b\u5b57\u6bb5\uff1f\u5b57\u6bb5\u7c7b\u578b\u662f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u67e5\u770b\u6240\u6709\u8868\nSELECT table_name, table_comment \nFROM information_schema.tables \nWHERE table_schema = 'your_database_name';\n-- \u67e5\u770b\u67d0\u4e2a\u8868\u7684\u6240\u6709\u5b57\u6bb5\nSELECT column_name, data_type, column_comment, column_key\nFROM information_schema.columns \nWHERE table_schema = 'your_database_name' \nAND table_name = 'orders'\nORDER BY ordinal_position;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud83d\udca1 \u5c0f\u6280\u5de7\uff1a<\/strong>\u5982\u679c\u4f60\u7528\u7684\u662fMySQL Workbench\u6216Navicat\uff0c\u53ef\u4ee5\u76f4\u63a5\u53f3\u952e\u8868\u2192&#8221;\u9006\u5411\u5de5\u7a0b\u5230\u6a21\u578b&#8221;\uff0c\u81ea\u52a8\u751f\u6210ER\u56fe\uff0c\u4e00\u76ee\u4e86\u7136\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5ef6\u4f38\u601d\u8003<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86\u67e5\u8868\u7ed3\u6784\uff0cinformation_schema\u8fd8\u80fd\u5e2e\u6211\u4eec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u67e5\u5916\u952e\u5173\u7cfb\uff1a<\/strong>\u4e86\u89e3\u8868\u4e0e\u8868\u4e4b\u95f4\u7684\u5173\u8054<\/li>\n\n\n\n<li><strong>\u67e5\u7d22\u5f15\uff1a<\/strong>\u4e86\u89e3\u67e5\u8be2\u6027\u80fd\u4f18\u5316<\/li>\n\n\n\n<li><strong>\u67e5\u5b57\u7b26\u96c6\uff1a<\/strong>\u907f\u514d\u4e2d\u6587\u4e71\u7801\u95ee\u9898<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5bf9\u6211\u4eec\u7406\u89e3\u4e1a\u52a1\u903b\u8f91\u3001\u7f16\u5199\u6d4b\u8bd5\u7528\u4f8b\u975e\u5e38\u6709\u5e2e\u52a9\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u805a\u5408\u51fd\u6570\uff1a\u6570\u636e\u4e00\u81f4\u6027\u7684&#8221;\u7167\u5996\u955c&#8221;<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\uff0c\u4f60\u662f\u5426\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u56f0\u60d1\uff1a\u529f\u80fd\u660e\u660e\u6ca1\u95ee\u9898\uff0c\u4f46\u603b\u611f\u89c9\u6570\u636e&#8221;\u602a\u602a\u7684&#8221;\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u65f6\u5019\uff0c<strong>\u805a\u5408\u51fd\u6570<\/strong>\u5c31\u662f\u6700\u597d\u7684\u9a8c\u8bc1\u5de5\u5177\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\uff1a\u9a8c\u8bc1\u8ba2\u5355\u6570\u636e\u4e00\u81f4\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u8981\u9a8c\u8bc1\u4e00\u4e2a\u7535\u5546\u8ba2\u5355\u7cfb\u7edf\u7684\u6570\u636e\u4e00\u81f4\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- 1. \u68c0\u67e5\u8ba2\u5355\u72b6\u6001\u5206\u5e03\nSELECT status, COUNT(*) as count \nFROM orders \nGROUP BY status;\n-- 2. \u68c0\u67e5\u8ba2\u5355\u91d1\u989d\u662f\u5426\u5f02\u5e38\uff08\u8d1f\u6570\u6216\u4e3a0\uff09\nSELECT * FROM orders \nWHERE total_amount &lt;= 0 OR total_amount > 1000000;\n-- 3. \u68c0\u67e5\u8ba2\u5355\u65f6\u95f4\u903b\u8f91\uff08\u521b\u5efa\u65f6\u95f4\u665a\u4e8e\u652f\u4ed8\u65f6\u95f4\uff1f\uff09\nSELECT order_id, created_at, paid_at \nFROM orders \nWHERE paid_at &lt; created_at;\n-- 4. \u68c0\u67e5\u5173\u8054\u6570\u636e\u4e00\u81f4\u6027\uff08\u8ba2\u5355\u6709\u660e\u7ec6\uff0c\u91d1\u989d\u8981\u5bf9\u5f97\u4e0a\uff09\nSELECT o.order_id, o.total_amount, \n       SUM(oi.price * oi.quantity) as detail_total\nFROM orders o\nLEFT JOIN order_items oi ON o.order_id = oi.order_id\nGROUP BY o.order_id, o.total_amount\nHAVING o.total_amount != detail_total\nLIMIT 10;<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u26a0\ufe0f \u91cd\u70b9\u63d0\u793a\uff1a<\/strong>\u7b2c4\u6761SQL\u975e\u5e38\u91cd\u8981\uff01\u6211\u5728\u5de5\u4f5c\u4e2d\u9047\u5230\u8fc7\u591a\u6b21&#8221;\u8ba2\u5355\u91d1\u989d\u548c\u660e\u7ec6\u5bf9\u4e0d\u4e0a&#8221;\u7684\u95ee\u9898\uff0c\u9760\u7684\u5c31\u662f\u8fd9\u6761\u67e5\u8be2\u53d1\u73b0\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u5ef6\u4f38\u601d\u8003<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e38\u7528\u7684\u805a\u5408\u51fd\u6570\u7ec4\u5408\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>COUNT + GROUP BY\uff1a<\/strong>\u7edf\u8ba1\u5404\u7c7b\u6570\u636e\u5206\u5e03<\/li>\n\n\n\n<li><strong>SUM + HAVING\uff1a<\/strong>\u627e\u51fa\u5f02\u5e38\u6c47\u603b\u503c<\/li>\n\n\n\n<li><strong>AVG + WHERE\uff1a<\/strong>\u68c0\u6d4b\u6781\u7aef\u503c<\/li>\n\n\n\n<li><strong>MAX\/MIN\uff1a<\/strong>\u68c0\u67e5\u65f6\u95f4\u6233\u3001ID\u7b49\u8fb9\u754c\u503c<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b66\u4f1a\u8fd9\u51e0\u62db\uff0c\u6570\u636e\u5f02\u5e38\u57fa\u672c\u65e0\u5904\u9041\u5f62\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e09\u3001INSERT\/UPDATE\uff1a\u9020\u6570\u636e\u7684&#8221;\u9b54\u6cd5\u68d2&#8221;<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\uff0c\u6700\u5934\u75bc\u7684\u662f\u4ec0\u4e48\uff1f<strong>\u6ca1\u6709\u6d4b\u8bd5\u6570\u636e\uff01<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b49\u5f00\u53d1\u9020\u6570\u636e\uff1f\u592a\u6162\u3002<br>\u81ea\u5df1\u624b\u52a8\u586b\uff1f\u592a\u7d2f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b66\u4f1aSQL\u9020\u6570\u636e\uff0c\u8ba9\u4f605\u5206\u949f\u641e\u5b9a\u539f\u6765\u534a\u5929\u7684\u6d3b\u513f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\uff1a\u6784\u9020\u5404\u79cd&#8221;\u6781\u7aef&#8221;\u6d4b\u8bd5\u6570\u636e<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>-- 1. \u590d\u5236\u73b0\u6709\u6570\u636e\uff08\u5feb\u901f\u9020\u4e00\u6279\u7c7b\u4f3c\u6570\u636e\uff09\nINSERT INTO orders (user_id, total_amount, status, created_at)\nSELECT user_id, total_amount, 'pending', DATE_ADD(created_at, INTERVAL 1 DAY)\nFROM orders WHERE status = 'paid' LIMIT 100;\n-- 2. \u6279\u91cf\u66f4\u65b0\u72b6\u6001\nUPDATE orders SET status = 'cancelled' \nWHERE created_at &lt; DATE_SUB(NOW(), INTERVAL 1 YEAR);\n-- 3. \u968f\u673a\u9020\u4e00\u6279\u6d4b\u8bd5\u7528\u6237\nINSERT INTO users (username, email, phone, created_at)\nSELECT \n    CONCAT('test_user_', n) as username,\n    CONCAT('test_user_', n, '@test.com') as email,\n    CONCAT('138', LPAD(n, 8, '0')) as phone,\n    NOW() as created_at\nFROM (SELECT @row := @row + 1 as n FROM \n      (SELECT 0 UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) t1,\n      (SELECT 0 UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) t2,\n      (SELECT @row:=0) t3 LIMIT 1000) numbers;<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\ud83d\udd27 \u5b9e\u6218\u6280\u5de7\uff1a<\/strong>\u7b2c3\u6761SQL\u770b\u8d77\u6765\u590d\u6742\uff0c\u5176\u5b9e\u5c31\u662f\u5229\u7528MySQL\u7684\u53d8\u91cf\u673a\u5236\u751f\u62101-1000\u7684\u5e8f\u53f7\uff0c\u7136\u540e\u62fc\u63a5\u6210\u6d4b\u8bd5\u6570\u636e\u3002\u6838\u5fc3\u662f<strong>SELECT\u914d\u5408CONCAT<\/strong>\uff0c\u53ef\u4ee5\u9020\u51fa\u4efb\u4f55\u4f60\u60f3\u8981\u7684\u6570\u636e\u683c\u5f0f\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u5ef6\u4f38\u601d\u8003<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9020\u6570\u636e\u7684\u8fdb\u9636\u7528\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8de8\u8868\u590d\u5236\uff1a<\/strong>\u4eceA\u8868\u590d\u5236\u5230B\u8868\uff08\u7ed3\u6784\u76f8\u4f3c\u65f6\uff09<\/li>\n\n\n\n<li><strong>\u65f6\u95f4\u504f\u79fb\uff1a<\/strong>\u7528DATE_ADD\u51fd\u6570\u6279\u91cf\u4fee\u6539\u65f6\u95f4<\/li>\n\n\n\n<li><strong>\u72b6\u6001\u673a\u6d4b\u8bd5\uff1a<\/strong>\u624b\u52a8\u628a\u72b6\u6001\u6539\u6210\u5f02\u5e38\u503c\uff0c\u6d4b\u8bd5\u7cfb\u7edf\u5bb9\u9519\u80fd\u529b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f&nbsp;<strong>\u63d0\u9192\uff1a<\/strong>\u751f\u4ea7\u73af\u5883\u5207\u52ff\u968f\u610f\u6267\u884cUPDATE\u548cDELETE\uff01\u5efa\u8bae\u5148\u7528SELECT\u786e\u8ba4\u5f71\u54cd\u8303\u56f4\uff0c\u6216\u8005\u5f00\u542f\u4e8b\u52a1\u5148ROLLBACK\u9a8c\u8bc1\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u56db\u3001\u6570\u636e\u6bd4\u5bf9\uff1a\u627e\u51fa\u5dee\u5f02\u7684&#8221;\u795e\u5668&#8221;<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\uff0c\u4f60\u6709\u6ca1\u6709\u9047\u5230\u8fc7\u8fd9\u79cd\u573a\u666f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;\u5f00\u53d1\u8bf4\u8fd9\u4e2a\u529f\u80fd\u6ca1\u95ee\u9898\u554a\uff0c\u4e3a\u4ec0\u4e48\u6d4b\u8bd5\u73af\u5883\u663e\u793a\u4e0d\u5bf9\uff1f&#8221;<br>&#8220;\u8fd9\u4e2a\u6570\u636e\u660e\u660e\u5e94\u8be5\u662fA\uff0c\u4e3a\u4ec0\u4e48\u663e\u793a\u662fB\uff1f&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981<strong>\u6570\u636e\u6bd4\u5bf9<\/strong>\u6765&#8221;\u5bf9\u8d26&#8221;\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\uff1a\u6bd4\u5bf9\u524d\u540e\u53f0\u6570\u636e\u5dee\u5f02<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>-- 1. \u627e\u51fa\u8ba2\u5355\u5728A\u8868\u6709\u4f46B\u8868\u6ca1\u6709\u7684\nSELECT order_id FROM orders_A\nWHERE order_id NOT IN (SELECT order_id FROM orders_B);\n-- 2. \u627e\u51fa\u540c\u4e00\u8ba2\u5355\u5728\u4e24\u4e2a\u8868\u7684\u6570\u636e\u5dee\u5f02\nSELECT o1.order_id, o1.status as status_A, o2.status as status_B\nFROM orders_A o1\nJOIN orders_B o2 ON o1.order_id = o2.order_id\nWHERE o1.status != o2.status;\n-- 3. \u7edf\u8ba1\u5dee\u5f02\u6570\u91cf\nSELECT \n    'A\u8868\u6709B\u8868\u65e0' as type, COUNT(*) as cnt FROM orders_A\nWHERE order_id NOT IN (SELECT order_id FROM orders_B)\nUNION ALL\nSELECT 'B\u8868\u6709A\u8868\u65e0' as type, COUNT(*) as cnt FROM orders_B\nWHERE order_id NOT IN (SELECT order_id FROM orders_A);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5ef6\u4f38\u601d\u8003<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u6bd4\u5bf9\u7684\u5176\u4ed6\u5e94\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a5\u53e3\u8fd4\u56devs\u6570\u636e\u5e93\uff1a<\/strong>\u9a8c\u8bc1API\u8fd4\u56de\u6570\u636e\u662f\u5426\u548c\u6570\u636e\u5e93\u4e00\u81f4<\/li>\n\n\n\n<li><strong>\u540c\u6b65\u524d\u540e\u5bf9\u6bd4\uff1a<\/strong>\u6570\u636e\u540c\u6b65\u540e\u9a8c\u8bc1\u4e00\u81f4\u6027<\/li>\n\n\n\n<li><strong>\u7248\u672c\u5347\u7ea7\u5bf9\u6bd4\uff1a<\/strong>\u5347\u7ea7\u524d\u540e\u6570\u636e\u662f\u5426\u4e22\u5931<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u4e2a\u5c0f\u5de5\u5177\u63a8\u8350\uff1a<strong>Beyond Compare<\/strong>\uff0c\u53ef\u4ee5\u53ef\u89c6\u5316\u6bd4\u5bf9\u4e24\u4e2a\u8868\u7684\u6570\u636e\uff0c\u975e\u5e38\u9002\u5408\u590d\u6742\u573a\u666f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e94\u3001\u9ad8\u6548\u67e5\u8be2\uff1a\u5904\u7406\u5927\u91cf\u6570\u636e\u7684&#8221;\u5feb\u8f66\u9053&#8221;<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u65f6\u5019\uff0c\u4f60\u9700\u8981\u67e5\u51e0\u5341\u4e07\u751a\u81f3\u4e0a\u767e\u4e07\u6761\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u76f4\u63a5SELECT * FROM orders\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8f7b\u5219\u5361\u6b7b\uff0c\u91cd\u5219\u6570\u636e\u5e93\u5d29\u6e83\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u5904\u7406\u5927\u6570\u636e\u91cf\u5fc5\u987b\u6709&#8221;\u4f18\u96c5&#8221;\u7684\u59ff\u52bf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\uff1a\u5206\u9875\u67e5\u8be2\u548c\u5bfc\u51fa\u5927\u91cf\u6570\u636e<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>-- 1. \u5206\u9875\u67e5\u8be2\uff08OFFSET\u65b9\u5f0f\uff0c\u7b80\u5355\u4f46\u6709\u6027\u80fd\u95ee\u9898\uff09\nSELECT * FROM orders \nORDER BY created_at DESC \nLIMIT 100 OFFSET 10000;\n-- 2. \u57fa\u4e8eID\u7684\u5206\u9875\uff08\u6027\u80fd\u66f4\u597d\uff0c\u63a8\u8350\uff01\uff09\nSELECT * FROM orders \nWHERE id > 10000  -- \u4e0a\u6b21\u67e5\u8be2\u7684 \u6700\u5927ID\nORDER BY id \nLIMIT 100;\n-- 3. \u5206\u6279\u5bfc\u51fa\u5230\u6587\u4ef6\uff08MySQL\u547d\u4ee4\u884c\uff09\nSELECT * FROM orders \nINTO OUTFILE '\/tmp\/orders_export.csv'\nFIELDS TERMINATED BY ',' \nLINES TERMINATED BY '\\n';\n-- 4. \u5927\u6570\u636e\u91cf\u7edf\u8ba1\uff08\u7528EXPLAIN\u5206\u6790\uff09\nEXPLAIN SELECT status, COUNT(*) FROM orders GROUP BY status;<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\ud83d\ude80 \u6027\u80fd\u4f18\u5316TIP\uff1a<\/strong>\u7b2c2\u79cd\u5206\u9875\u65b9\u5f0f\u53eb&#8221;\u6e38\u6807\u5206\u9875&#8221;\u6216&#8221;ID\u5206\u9875&#8221;\uff0c\u6bd4OFFSET\u6027\u80fd\u597d10\u500d\u4ee5\u4e0a\uff01\u56e0\u4e3aOFFSET\u8d8a\u5927\uff0cMySQL\u9700\u8981\u626b\u63cf\u8df3\u8fc7\u7684\u884c\u6570\u8d8a\u591a\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u5ef6\u4f38\u601d\u8003<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5904\u7406\u5927\u6570\u636e\u91cf\u7684\u5176\u4ed6\u5efa\u8bae\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u907f\u514dSELECT \\*\uff1a<\/strong>\u53ea\u67e5\u9700\u8981\u7684\u5b57\u6bb5<\/li>\n\n\n\n<li><strong>\u5229\u7528\u7d22\u5f15\uff1a<\/strong>WHERE\u6761\u4ef6\u5c3d\u91cf\u8d70\u7d22\u5f15<\/li>\n\n\n\n<li><strong>\u5206\u6279\u5904\u7406\uff1a<\/strong>\u7528LIMIT\u5206\u6279\uff0c\u907f\u514d\u4e00\u6b21\u6027\u52a0\u8f7d<\/li>\n\n\n\n<li><strong>\u5bfc\u51fa\u5de5\u5177\uff1a<\/strong>Navicat\u3001DataGrip\u90fd\u6709\u6279\u91cf\u5bfc\u51fa\u529f\u80fd\uff0c\u6bd4\u547d\u4ee4\u884c\u66f4\u53cb\u597d<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5199\u5728\u6700\u540e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u597d\u5566\uff0c\u4eca\u5929\u7684SQL\u6280\u5de7\u5206\u4eab\u5c31\u5230\u8fd9\u91cc\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56de\u987e\u4e00\u4e0b\u6211\u4eec\u804a\u5230\u76845\u4e2a\u6280\u80fd\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>information_schema\uff1a<\/strong>\u5feb\u901f\u4e86\u89e3\u6570\u636e\u5e93\u7ed3\u6784<\/li>\n\n\n\n<li><strong>\u805a\u5408\u51fd\u6570\uff1a<\/strong>\u9a8c\u8bc1\u6570\u636e\u4e00\u81f4\u6027<\/li>\n\n\n\n<li><strong>INSERT\/UPDATE\uff1a<\/strong>\u5feb\u901f\u6784\u9020\u6d4b\u8bd5\u6570\u636e<\/li>\n\n\n\n<li><strong>\u6570\u636e\u6bd4\u5bf9\uff1a<\/strong>\u627e\u51fa\u5dee\u5f02\uff0c\u5bf9\u8d26\u5fc5\u5907<\/li>\n\n\n\n<li><strong>\u9ad8\u6548\u67e5\u8be2\uff1a<\/strong>\u5206\u9875\u548c\u5bfc\u51fa\u5927\u6570\u636e<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e9b\u6280\u5de7\u4e0d\u9700\u8981\u4f60\u80cc\u4e0b\u6765\uff0c\u800c\u662f\u8981\u5728\u5b9e\u8df5\u4e2d<strong>\u7406\u89e3\u601d\u8def\u3001\u4e3e\u4e00\u53cd\u4e09<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u7684\u5efa\u8bae\u662f\uff1a<strong>\u5efa\u4e00\u4e2a\u81ea\u5df1\u7684&#8221;SQL\u5c0f\u672c\u672c&#8221;<\/strong>\uff0c\u628a\u5de5\u4f5c\u4e2d\u5e38\u7528\u7684\u67e5\u8be2\u4fdd\u5b58\u4e0b\u6765\uff0c\u4e0b\u6b21\u9047\u5230\u7c7b\u4f3c\u573a\u666f\u76f4\u63a5\u6539\u6539\u5c31\u80fd\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bb0\u4f4f\u4e00\u53e5\u8bdd\uff1a<strong>SQL\u4e0d\u662f\u9b54\u6cd5\uff0c\u4f46\u5b83\u80fd\u8ba9\u6d4b\u8bd5\u5de5\u4f5c\u66f4\u6709&#8221;\u5e95\u6c14&#8221;\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f60\u5b66\u4f1a\u7528SQL\u9a8c\u8bc1\u6570\u636e\u3001\u7528SQL\u6784\u9020\u573a\u666f\u3001\u7528SQL\u5b9a\u4f4d\u95ee\u9898\uff0c\u4f60\u4f1a\u53d1\u73b0\u2014\u2014\u6d4b\u8bd5\u7684\u4e16\u754c\uff0c\u6bd4\u4f60\u60f3\u8c61\u7684\u8981\u5bbd\u5e7f\u5f97\u591a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5404\u4f4d\u6d4b\u8bd5\u5c0f\u4f19\u4f34\u4eec\uff0c\u4eca\u5929\u60f3\u548c\u5927\u5bb6\u804a\u804a\u4e00\u4e2a&#8221;\u8001\u751f\u5e38\u8c08&#8221;\u4f46\u53c8\u7279\u522b\u91cd\u8981\u7684\u8bdd\u9898\u2014\u2014SQL\u3002 \u53ef\u80fd &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.deartester.com\/index.php\/2026\/03\/22\/%e6%b5%8b%e8%af%95%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%bf%85%e9%a1%bb%e6%8e%8c%e6%8f%a1%e7%9a%84sql%e6%8a%80%e5%b7%a7\/\" class=\"more-link\">Read more<span class=\"screen-reader-text\"> &#8220;\u6d4b\u8bd5\u5de5\u7a0b\u5e08\u5fc5\u987b\u638c\u63e1\u7684SQL\u6280\u5de7&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-51","post","type-post","status-publish","format-standard","hentry","category-auto-tools"],"_links":{"self":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/51","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/comments?post=51"}],"version-history":[{"count":2,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/51\/revisions"}],"predecessor-version":[{"id":53,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/51\/revisions\/53"}],"wp:attachment":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/media?parent=51"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/categories?post=51"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/tags?post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}