{"id":205484,"date":"2025-06-04T10:44:05","date_gmt":"2025-06-04T02:44:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/?p=205484"},"modified":"2025-06-04T10:44:05","modified_gmt":"2025-06-04T02:44:05","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90-mysql-%e4%b8%ad-intm-%e7%9a%84%e7%9c%9f%e6%ad%a3%e5%90%ab%e4%b9%89%e5%8f%8a%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205484\/","title":{"rendered":"\u6df1\u5165\u89e3\u6790 MySQL \u4e2d INT(M) \u7684\u771f\u6b63\u542b\u4e49\u53ca\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\uff0c\u8bb8\u591a\u4eba\u4f1a\u88ab MySQL \u4e2d <code>INT(3)<\/code>\u3001<code>INT(11)<\/code> \u7b49\u542b\u62ec\u53f7\u7684\u5199\u6cd5\u6240\u8ff7\u60d1\uff0c\u4ee5\u4e3a\u62ec\u53f7\u91cc\u7684\u6570\u5b57\u4f1a\u5f71\u54cd\u5b58\u50a8\u7a7a\u95f4\u6216\u6570\u503c\u8303\u56f4\u3002\u672c\u6587\u5c06\u4ece\u5e95\u5c42\u5b58\u50a8\u539f\u7406\u548c\u663e\u793a\u683c\u5f0f\u5316\u89d2\u5ea6\uff0c\u5f7b\u5e95\u5256\u6790 <code>INT(M)<\/code> \u7684\u672c\u8d28\u7528\u9014\uff0c\u5e76\u7ed3\u5408\u5b9e\u8df5\u7ecf\u9a8c\uff0c\u7ed9\u51fa\u73b0\u4ee3\u9879\u76ee\u4e2d\u5982\u4f55\u66f4\u5408\u7406\u5730\u5b9a\u4e49\u6574\u6570\u5b57\u6bb5\u7684\u5efa\u8bae\uff0c\u540c\u65f6\u5206\u4eab\u5982\u4f55\u5c06 MySQL \u6570\u636e\u5e93\u90e8\u7f72\u5728<strong>\u9999\u6e2f\u670d\u52a1\u5668<\/strong>\u4e0a\uff0c\u83b7\u5f97\u66f4\u7a33\u5b9a\u7684\u7f51\u7edc\u6027\u80fd\u4e0e\u66f4\u4f4e\u7684\u8bbf\u95ee\u5ef6\u8fdf\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001<code>INT(M)<\/code>\uff1a\u5b58\u50a8\u7a7a\u95f4\u4e0e\u6570\u503c\u8303\u56f4\u90fd\u662f\u56fa\u5b9a\u7684<\/h2>\n<ol>\n<li><strong>\u5b58\u50a8\u7a7a\u95f4\u56fa\u5b9a\u4e3a 4 \u5b57\u8282<\/strong><br \/>\n\u5728 MySQL \u4e2d\uff0c\u65e0\u8bba\u4f60\u628a\u6574\u6570\u5b57\u6bb5\u5b9a\u4e49\u6210 <code>INT(1)<\/code>\u3001<code>INT(3)<\/code>\u3001<code>INT(11)<\/code> \u8fd8\u662f <code>INT(100)<\/code>\uff0c\u5b83\u5728\u78c1\u76d8\u5c42\u9762\u90fd\u5360\u7528 <strong>4 \u5b57\u8282<\/strong>\u3002\u5c31\u50cf\u4e00\u4e2a\u62bd\u5c49\u7684\u5927\u5c0f\u5df2\u7ecf\u56fa\u5b9a\uff0c\u4f60\u53ea\u80fd\u5f80\u91cc\u9762\u653e 4 \u5b57\u8282\u7684\u5185\u5bb9\uff0c\u65e0\u8bba\u4f60\u5728\u540d\u79f0\u4e0a\u5199\u51e0\u4e2a\u6570\u5b57\uff0c\u90fd\u4e0d\u4f1a\u6539\u53d8\u5b83\u80fd\u5b58\u50a8\u7684\u5b9e\u9645\u7a7a\u95f4\u3002<\/li>\n<li><strong>\u6570\u503c\u8303\u56f4\u4e0d\u53d7\u663e\u793a\u5bbd\u5ea6\u5f71\u54cd<\/strong>\n<ul>\n<li><strong>\u6709\u7b26\u53f7\u6574\u6570\uff08Signed INT\uff09<\/strong>\uff1a<code>-2,147,483,648<\/code> \u5230 <code>2,147,483,647<\/code>\u3002<\/li>\n<li><strong>\u65e0\u7b26\u53f7\u6574\u6570\uff08Unsigned INT\uff09<\/strong>\uff1a<code>0<\/code> \u5230 <code>4,294,967,295<\/code>\u3002<br \/>\n\u65e0\u8bba\u4f60\u7684\u5b9a\u4e49\u662f <code>INT(3)<\/code> \u8fd8\u662f <code>INT(11)<\/code>\uff0c\u5b83\u4eec\u7684\u6570\u503c\u8303\u56f4\u5b8c\u5168\u4e00\u81f4\u3002\u53ea\u8981\u4f60\u4f20\u5165\u7684\u6570\u503c\u5728\u4e0a\u8ff0\u8303\u56f4\u5185\uff0c\u5b57\u6bb5\u90fd\u80fd\u591f\u6b63\u5e38\u5b58\u50a8\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u7531\u6b64\u53ef\u89c1\uff0c\u62ec\u53f7\u91cc\u7684\u6570\u5b57\u5e76\u4e0d\u80fd\u6269\u5927\u6216\u7f29\u5c0f\u5b58\u50a8\u8303\u56f4\uff0c\u4e5f\u4e0d\u4f1a\u6539\u53d8\u5360\u7528\u7a7a\u95f4\u5927\u5c0f\u3002\u5b83\u7684\u201c\u672c\u804c\u5de5\u4f5c\u201d\u5e76\u975e\u63a7\u5236\u5b58\u50a8\u80fd\u529b\uff0c\u800c\u662f\u5f71\u54cd\u67e5\u8be2\u7ed3\u679c\u65f6\u7684\u663e\u793a\u683c\u5f0f\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001<code>(M)<\/code> \u7684\u771f\u6b63\u4f5c\u7528\uff1a\u663e\u793a\u5bbd\u5ea6\u4e0e <code>ZEROFILL<\/code> \u7ed3\u5408<\/h2>\n<p>MySQL \u4e2d <code>INT(M)<\/code> \u4e2d\u7684 <code>M<\/code>\uff0c\u79f0\u4e3a\u201c\u663e\u793a\u5bbd\u5ea6\u201d\uff08Display Width\uff09\u3002\u5728\u4e0d\u542f\u7528 <code>ZEROFILL<\/code> \u65f6\uff0c\u8fd9\u4e2a\u5bbd\u5ea6\u5e76\u4e0d\u4f1a\u5bf9\u6570\u636e\u5b58\u50a8\u548c\u663e\u793a\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\uff1b\u4f46\u53ea\u8981\u5728\u5b57\u6bb5\u540e\u9762\u52a0\u4e0a <code>ZEROFILL<\/code> \u5c5e\u6027\uff0c\u5c31\u4f1a\u5728\u6570\u5b57\u663e\u793a\u65f6\u81ea\u52a8\u586b\u5145\u5de6\u4fa7\u7684\u96f6\u3002<\/p>\n<h3>2.1 \u6ca1\u6709\u542f\u7528 <code>ZEROFILL<\/code> \u65f6\u7684\u8868\u73b0<\/h3>\n<ul>\n<li>\u5b9a\u4e49\uff1a\n<pre><code class=\"language-sql\">CREATE TABLE demo_no_zf (\r\n    a INT(3),\r\n    b INT(11)\r\n);\r\n<\/code><\/pre>\n<\/li>\n<li>\u63d2\u5165\u5e76\u67e5\u8be2\uff1a\n<pre><code class=\"language-sql\">INSERT INTO demo_no_zf (a, b) VALUES (5, 5), (1234, 1234);\r\nSELECT * FROM demo_no_zf;\r\n<\/code><\/pre>\n<\/li>\n<li>\u67e5\u8be2\u7ed3\u679c\uff1a\n<pre><code>a    | b\r\n------------\r\n5    | 5\r\n1234 | 1234\r\n<\/code><\/pre>\n<p>\u6b64\u65f6 <code>INT(3)<\/code> \u548c <code>INT(11)<\/code> \u53ea\u662f\u4f5c\u4e3a\u201c\u6ce8\u91ca\u201d\uff08\u540e\u53f0\u4f9d\u7136\u6309\u7167 4 \u5b57\u8282\u5b58\u50a8\uff09\uff0c\u663e\u793a\u65f6\u4e0d\u4f1a\u56e0\u4e3a\u5bbd\u5ea6\u800c\u5728\u5de6\u4fa7\u8865\u96f6\u3002<\/li>\n<\/ul>\n<h3>2.2 \u542f\u7528 <code>ZEROFILL<\/code> \u65f6\u7684\u8868\u73b0<\/h3>\n<ul>\n<li>\u5b9a\u4e49\uff1a\n<pre><code class=\"language-sql\">CREATE TABLE demo_zf (\r\n    a INT(3) ZEROFILL,\r\n    b INT(11) ZEROFILL\r\n);\r\n<\/code><\/pre>\n<\/li>\n<li>\u63d2\u5165\u5e76\u67e5\u8be2\uff1a\n<pre><code class=\"language-sql\">INSERT INTO demo_zf (a, b) VALUES (5, 5), (42, 42), (123, 123), (1234, 1234);\r\nSELECT * FROM demo_zf;\r\n<\/code><\/pre>\n<\/li>\n<li>\u67e5\u8be2\u7ed3\u679c\u793a\u4f8b\uff1a\n<pre><code>a     | b\r\n-------------\r\n005   | 00000000005\r\n042   | 00000000042\r\n123   | 00000000123\r\n1234  | 00000001234\r\n<\/code><\/pre>\n<ul>\n<li>\u5bf9\u4e8e <code>a INT(3) ZEROFILL<\/code>\uff1a\u5bbd\u5ea6\u4e3a 3\uff0c\u6570\u5b57\u4e0d\u8db3 3 \u4f4d\u5219\u5de6\u4fa7\u8865\u96f6\uff1b\u82e5\u6570\u5b57\u8d85\u51fa\u5bbd\u5ea6\uff08\u5982 1234\uff09\uff0c\u4e5f\u4f1a\u5b8c\u6574\u663e\u793a\uff0c\u4e0d\u4f1a\u622a\u65ad\u3002<\/li>\n<li>\u5bf9\u4e8e <code>b INT(11) ZEROFILL<\/code>\uff1a\u5bbd\u5ea6\u4e3a 11\uff0c\u540c\u7406\u5728\u5de6\u4fa7\u8865\u8db3\u5230 11 \u4f4d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u5173\u952e\u7ed3\u8bba<\/strong>\uff1a<\/p>\n<ul>\n<li><code>M<\/code> \u53ea\u5728\u542f\u7528 <code>ZEROFILL<\/code> \u65f6\uff0c\u5bf9\u201c\u663e\u793a\u201d\u8d77\u683c\u5f0f\u5316\u4f5c\u7528\uff1b<\/li>\n<li>\u5728 <strong>\u672a\u542f\u7528<\/strong> <code>ZEROFILL<\/code> \u65f6\uff0c<code>INT(M)<\/code> \u4e0e\u5355\u7eaf\u5199 <code>INT<\/code> \u6ca1\u6709\u4efb\u4f55\u5dee\u522b\uff1b<\/li>\n<li><code>INT(M)<\/code> \u5e76\u4e0d\u7ea6\u675f\u53ef\u5b58\u50a8\u7684\u6570\u503c\u5927\u5c0f\uff0c\u53ea\u8981\u5728\u6570\u503c\u8303\u56f4\u5185\uff0c\u90fd\u80fd\u6b63\u5e38\u5199\u5165\u3002<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e09\u3001\u73b0\u4ee3\u9879\u76ee\u4e2d\u5982\u4f55\u5b9a\u4e49\u6574\u6570\u5b57\u6bb5\u66f4\u5408\u7406<\/h2>\n<p>\u57fa\u4e8e\u4ee5\u4e0a\u5bf9 <code>INT(M)<\/code> \u7684\u7406\u89e3\uff0c\u7ed3\u5408\u5f53\u524d MySQL 8.0+ \u7279\u6027\u4e0e\u672a\u6765\u8d8b\u52bf\uff0c\u63a8\u8350\u4ee5\u4e0b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n<ol>\n<li><strong>\u5c3d\u91cf\u4e0d\u7528 <code>ZEROFILL<\/code><\/strong><br \/>\n\u4ece MySQL 8.0 \u5f00\u59cb\uff0c<code>ZEROFILL<\/code> \u5df2\u88ab\u6807\u8bb0\u4e3a\u5e9f\u5f03\u3002\u82e5\u8981\u5728\u524d\u7aef\u6216\u62a5\u8868\u4e2d\u5bf9\u6570\u5b57\u8fdb\u884c\u5de6\u4fa7\u8865\u96f6\u5904\u7406\uff0c\u63a8\u8350\u5728\u5e94\u7528\u5c42\uff08\u5982 Java\u3001PHP\u3001Python \u7b49\uff09\u5229\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u6216\u524d\u7aef\u5c55\u793a\u6846\u67b6\uff08\u5982 Vue\u3001React\uff09\u6765\u5b8c\u6210\uff0c\u800c\u4e0d\u662f\u4f9d\u8d56\u6570\u636e\u5e93\u3002<\/li>\n<li><strong>\u76f4\u63a5\u4f7f\u7528 <code>INT<\/code> \u6216\u660e\u786e\u6307\u660e <code>UNSIGNED<\/code><\/strong>\n<ul>\n<li>\u5982\u679c\u4e1a\u52a1\u573a\u666f\u4e0d\u9700\u8981\u8d1f\u6570\uff0c\u4f7f\u7528 <code>INT UNSIGNED<\/code>\uff1a\n<pre><code class=\"language-sql\">CREATE TABLE orders (\r\n    order_id INT UNSIGNED NOT NULL AUTO_INCREMENT,\r\n    ...\r\n    PRIMARY KEY(order_id)\r\n);\r\n<\/code><\/pre>\n<\/li>\n<li>\u5982\u679c\u9700\u8981\u6807\u6ce8\u5b57\u6bb5\u5927\u5c0f\u533a\u95f4\uff0c\u5728\u6ce8\u91ca\u6216\u4e1a\u52a1\u6587\u6863\u4e2d\u8bf4\u660e\u5373\u53ef\uff0c\u4e0d\u5fc5\u4f7f\u7528 <code>INT(M)<\/code>\u3002\u7b80\u6d01\u5199\u6cd5\u6709\u52a9\u4e8e\u63d0\u9ad8\u5f00\u53d1\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6548\u7387\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4e0d\u8981\u8bef\u89e3 <code>M<\/code>\uff1a\u5b83\u53ea\u662f\u4e2a\u201c\u754c\u9762\u683c\u5f0f\u63d0\u793a\u201d<\/strong>\n<ul>\n<li>\u5bf9\u4e8e\u6ca1\u6709 <code>ZEROFILL<\/code> \u7684\u5b57\u6bb5\uff1a\n<pre><code class=\"language-sql\">CREATE TABLE users (\r\n    id INT NOT NULL,\r\n    ...\r\n);\r\n<\/code><\/pre>\n<p>\u8fd9\u6837\u66f4\u76f4\u89c2\uff0c\u4e14\u4e0e <code>INT(11)<\/code> \u7b49\u6548\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u672a\u6765\u7248\u672c\u517c\u5bb9\u6027\u8003\u8651<\/strong><br \/>\n\u5982\u8981\u5728\u66f4\u9ad8\u7248\u672c MySQL \u4e0a\u4fdd\u6301\u517c\u5bb9\uff0c\u5efa\u8bae\u4ece\u4e00\u5f00\u59cb\u5c31\u907f\u514d\u4f7f\u7528 <code>INT(M) ZEROFILL<\/code>\uff0c\u4ee5\u514d\u672a\u6765\u66f4\u65b0\u540e\u51fa\u73b0\u4e0d\u517c\u5bb9\u6216\u8fc1\u79fb\u9ebb\u70e6\u3002<\/li>\n<\/ol>\n<hr \/>\n<h2>\u56db\u3001\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\u4e0b\u7684 MySQL \u90e8\u7f72\u5efa\u8bae<\/h2>\n<p>\u5728\u9009\u62e9\u670d\u52a1\u5668\u65f6\uff0c\u9762\u5411\u56fd\u5185\u5916\u7528\u6237\u3001\u5c24\u5176\u5bf9\u4e9a\u592a\u5730\u533a\u8bbf\u95ee\u4f53\u9a8c\u8981\u6c42\u8f83\u9ad8\u7684\u9879\u76ee\uff0c\u4f7f\u7528<strong>\u9999\u6e2fvps<\/strong>\u3001<strong>\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong>\u6216<strong>\u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668<\/strong>\u90fd\u80fd\u663e\u8457\u964d\u4f4e\u7f51\u7edc\u5ef6\u8fdf\u5e76\u63d0\u9ad8\u7a33\u5b9a\u6027\u3002\u4e0b\u9762\u7ed3\u5408\u5b9e\u9645\u573a\u666f\uff0c\u5206\u4eab\u5e94\u5982\u4f55\u5728\u9999\u6e2f\u8282\u70b9\u4e0a\u90e8\u7f72 MySQL\uff0c\u5e76\u914d\u5408\u4e0a\u8ff0\u6574\u6570\u5b57\u6bb5\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<h3>4.1 \u7f51\u7edc\u5ef6\u8fdf\u4e0e\u7a33\u5b9a\u6027\u7684\u4f18\u52bf<\/h3>\n<ul>\n<li><strong>\u5730\u7406\u4f4d\u7f6e\u4f18\u52bf<\/strong>\uff1a\u9999\u6e2f\u673a\u623f\u4e0e\u4e2d\u56fd\u5927\u9646\u3001\u4e1c\u5357\u4e9a\u5730\u533a\u6709\u76f4\u8fde\u7ebf\u8def\uff0c\u5ef6\u8fdf\u901a\u5e38\u5728 20\u201350ms \u4e4b\u95f4\uff0c\u975e\u5e38\u9002\u5408\u4f5c\u4e3a\u8de8\u5883\u4e1a\u52a1\u6570\u636e\u5e93\u8282\u70b9\uff1b<\/li>\n<li><strong>\u5e26\u5bbd\u8d44\u6e90\u4e30\u5bcc<\/strong>\uff1a\u5927\u591a\u6570\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u63d0\u4f9b\u5546\u5177\u5907\u591a\u7ebf BGP \u63a5\u5165\uff0c\u53ef\u5e94\u5bf9\u9ad8\u5e76\u53d1\u8bbf\u95ee\u4e0e\u7a81\u53d1\u6d41\u91cf\uff0c\u4fdd\u8bc1\u6570\u636e\u5e93\u7a33\u5b9a\u8fd0\u884c\uff1b<\/li>\n<li><strong>\u56fd\u9645\u8bbf\u95ee\u80fd\u529b<\/strong>\uff1a\u5bf9\u4e8e\u9762\u5411\u5168\u7403\u7528\u6237\u7684\u7f51\u7ad9\u6216 API\uff0c\u5c06\u6570\u636e\u5e93\u90e8\u7f72\u5728\u9999\u6e2f\u8282\u70b9\u53ef\u63d0\u9ad8\u6b27\u6d32\u3001\u7f8e\u6d32\u7b49\u5730\u7528\u6237\u8bbf\u95ee\u901f\u5ea6\uff0c\u63d0\u5347\u6574\u4f53\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<\/ul>\n<h3>4.2\u914d\u7f6e\u793a\u4f8b\uff1a\u5728\u9999\u6e2f\u8282\u70b9\u4e0a\u5feb\u901f\u90e8\u7f72 MySQL<\/h3>\n<p>\u4ee5\u4e0b\u4ee5 CentOS 7\/8 \u7cfb\u7edf\u4e3a\u4f8b\uff0c\u8bf4\u660e\u5982\u4f55\u7ed3\u5408\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\u5b89\u88c5\u5e76\u8c03\u4f18 MySQL\uff1a<\/p>\n<ol>\n<li><strong>\u66f4\u65b0\u7cfb\u7edf\u5e76\u5b89\u88c5 MySQL<\/strong>\n<pre><code class=\"language-bash\">sudo yum update -y\r\nsudo yum install -y mysql-server\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u542f\u52a8\u5e76\u8bbe\u7f6e\u5f00\u673a\u81ea\u542f<\/strong>\n<pre><code class=\"language-bash\">sudo systemctl start mysqld\r\nsudo systemctl enable mysqld\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u521d\u59cb\u5316 root \u5bc6\u7801<\/strong><br \/>\n\u9996\u6b21\u8fd0\u884c\u540e\uff0cMySQL \u4f1a\u751f\u6210\u4e00\u4e2a\u4e34\u65f6\u968f\u673a\u5bc6\u7801\uff0c\u67e5\u770b\u65e5\u5fd7\u5e76\u8fdb\u884c\u5b89\u5168\u521d\u59cb\u5316\uff1a<\/p>\n<pre><code class=\"language-bash\">sudo grep 'temporary password' \/var\/log\/mysqld.log\r\nsudo mysql_secure_installation\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8c03\u6574\u7f51\u7edc\u914d\u7f6e<\/strong><br \/>\n\u5728 <code>\/etc\/my.cnf<\/code> \u6216 <code>\/etc\/mysql\/mysql.conf.d\/mysqld.cnf<\/code> \u4e2d\u4fee\u6539\uff1a<\/p>\n<pre><code class=\"language-ini\">[mysqld]\r\nbind-address = 0.0.0.0       # \u5141\u8bb8\u5916\u90e8\u8bbf\u95ee\r\nmax_connections = 500        # \u6839\u636e\u4e1a\u52a1\u8c03\u6574\r\ninnodb_buffer_pool_size = 4G # \u6839\u636e\u5185\u5b58\u5927\u5c0f\u8bbe\u7f6e\r\n<\/code><\/pre>\n<p>\u4fdd\u5b58\u540e\u91cd\u542f\uff1a<\/p>\n<pre><code class=\"language-bash\">sudo systemctl restart mysqld\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u9632\u706b\u5899\u4e0e\u5b89\u5168\u7ec4\u8bbe\u7f6e<\/strong><br \/>\n\u786e\u4fdd\u653e\u901a 3306 \u7aef\u53e3\uff1a<\/p>\n<pre><code class=\"language-bash\">sudo firewall-cmd --permanent --add-port=3306\/tcp\r\nsudo firewall-cmd --reload\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u521b\u5efa\u4e1a\u52a1\u5e93\u4e0e\u7528\u6237<\/strong>\n<pre><code class=\"language-sql\">CREATE DATABASE appdb CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;\r\nCREATE USER 'appuser'@'%' IDENTIFIED BY 'StrongPassword!';\r\nGRANT ALL PRIVILEGES ON appdb.* TO 'appuser'@'%';\r\nFLUSH PRIVILEGES;\r\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<h3>4.3 \u6027\u80fd\u4f18\u5316\u4e0e\u9ad8\u53ef\u7528<\/h3>\n<ol>\n<li><strong>\u7d22\u5f15\u4e0e\u67e5\u8be2\u4f18\u5316<\/strong>\n<ul>\n<li>\u4f7f\u7528 <code>EXPLAIN<\/code> \u8bca\u65ad\u6162\u67e5\u8be2\uff0c\u5408\u7406\u521b\u5efa\u8986\u76d6\u7d22\u5f15\uff1b<\/li>\n<li>\u5b9a\u671f\u8fd0\u884c <code>OPTIMIZE TABLE<\/code>\uff0c\u6e05\u7406\u6570\u636e\u788e\u7247\uff1b<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u8bfb\u5199\u5206\u79bb\u4e0e\u4e3b\u4ece\u540c\u6b65<\/strong>\n<ul>\n<li>\u5efa\u8bae\u90e8\u7f72\u81f3\u5c11\u4e00\u4e3b\u4e00\u4ece\u67b6\u6784\uff0c\u51cf\u8f7b\u4e3b\u5e93\u5199\u5165\u538b\u529b\uff1b<\/li>\n<li>\u53ef\u4f7f\u7528 ProxySQL\u3001MySQL Router \u7b49\u4e2d\u95f4\u4ef6\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb\uff1b<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5907\u4efd\u4e0e\u6062\u590d\u7b56\u7565<\/strong>\n<ul>\n<li>\u5b9a\u65f6\u4f7f\u7528 <code>mysqldump<\/code> \u6216 Percona XtraBackup \u8fdb\u884c\u70ed\u5907\u4efd\uff1b<\/li>\n<li>\u5f02\u5730\u5907\u4efd\u81f3\u9999\u6e2f\u4ee5\u5916\u7684\u5176\u4ed6\u673a\u623f\uff0c\u786e\u4fdd\u6570\u636e\u5b89\u5168\uff1b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h2>\u4e94\u3001\u7ed3\u8bed<\/h2>\n<p>\u901a\u8fc7\u672c\u6587\u5bf9 MySQL \u4e2d <code>INT(M)<\/code> \u672c\u8d28\u7684\u6df1\u5165\u89e3\u6790\u4ee5\u53ca\u73b0\u4ee3\u6700\u4f73\u5b9e\u8df5\u5efa\u8bae\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u9879\u76ee\u8bbe\u8ba1\u65f6\u907f\u514d\u8bef\u89e3\u5e76\u7f16\u5199\u66f4\u4e3a\u6e05\u6670\u7b80\u6d01\u7684 SQL \u8bed\u53e5\u3002\u540c\u65f6\uff0c\u5728 <a href=\"https:\/\/server.hk\/\"><strong>\u9999\u6e2f\u670d\u52a1\u5668<\/strong><\/a> \u73af\u5883\u90e8\u7f72 MySQL\uff0c\u4e0d\u4ec5\u80fd\u4eab\u53d7\u4f4e\u5ef6\u8fdf\u4e0e\u9ad8\u5e26\u5bbd\u7684\u663e\u8457\u4f18\u52bf\uff0c\u8fd8\u80fd\u5145\u5206\u5229\u7528\u9999\u6e2f\u673a\u623f\u7684\u7a33\u5b9a\u7f51\u7edc\u67b6\u6784\uff0c\u4e3a\u8de8\u5883\u4e1a\u52a1\u63d0\u4f9b\u53ef\u9760\u652f\u6491\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f15\u8a00 \u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\uff0c\u8bb8\u591a\u4eba\u4f1a\u88ab&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-205484","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205484","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=205484"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205484\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}