{"id":11335,"date":"2019-07-29T00:00:00","date_gmt":"2019-07-28T16:00:00","guid":{"rendered":"http:\/\/sql-mysql"},"modified":"2026-03-28T21:55:24","modified_gmt":"2026-03-28T13:55:24","slug":"sql-mysql","status":"publish","type":"post","link":"https:\/\/fgchen.com\/wpedu\/2019\/07\/sql-mysql\/","title":{"rendered":"\u8cc7\u6599\u5eab-SQL &amp; MySQL"},"content":{"rendered":"<h2>SQL\u7d93\u5178\u7df4\u7fd2\u984c<\/h2>\n\n\u8cc7\u6599\u51fa\u8655\uff1a<a href=\"https:\/\/blog.csdn.net\/zhenglit\/article\/details\/79517837\" target=\"_blank\" rel=\"noopener noreferrer\">SQL\u7d93\u5178\u7df4\u7fd2\u984c<\/a>\n\n<h2>\u8cc7\u6599\u6e96\u5099<\/h2>\n\n\u5efa\u7acbStudents, Courses, Scores, Teachers\u56db\u500b\u8cc7\u6599\u8868\u683c\u53ca\u5728\u56db\u500b\u8868\u683c\u4e2d\u52a0\u5165\u4e00\u4e9b\u7df4\u7fd2\u7528\u7684\u8cc7\u6599(\u8acb\u5c07\u4e0b\u5217\u7684SQL\u7a0b\u5f0f\u78bc\u526a\u8cbc\u81f3phpMyAdmin)\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">-- phpMyAdmin SQL Dump\n-- version 4.9.5\n-- https:\/\/www.phpmyadmin.net\/\n--\n-- \u4e3b\u6a5f\uff1a localhost:3306\n-- \u7522\u751f\u6642\u9593\uff1a 2021 \u5e74 05 \u6708 19 \u65e5 10:36\n-- \u4f3a\u670d\u5668\u7248\u672c\uff1a 10.3.29-MariaDB\n-- PHP \u7248\u672c\uff1a 7.3.28\n\nSET SQL_MODE = \"NO_AUTO_VALUE_ON_ZERO\";\nSET AUTOCOMMIT = 0;\nSTART TRANSACTION;\nSET time_zone = \"+00:00\";\n\n\n\/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT *\/;\n\/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS *\/;\n\/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION *\/;\n\/*!40101 SET NAMES utf8mb4 *\/;\n\n--\n-- \u8cc7\u6599\u5eab\uff1a `u1085100_SQL_Practice`\n--\n\n-- --------------------------------------------------------\n\n--\n-- \u8cc7\u6599\u8868\u7d50\u69cb `Courses`\n--\n\nCREATE TABLE `Courses` (\n  `cno` varchar(5) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `cname` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `tno` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL\n) ENGINE=InnoDB DEFAULT CHARSET=latin1;\n\n--\n-- \u50be\u5370\u8cc7\u6599\u8868\u7684\u8cc7\u6599 `Courses`\n--\n\nINSERT INTO `Courses` (`cno`, `cname`, `tno`) VALUES\n('3-105', '\u8a08\u7b97\u6a5f\u6982\u8ad6', '825'),\n('3-245', '\u4f5c\u696d\u7cfb\u7d71', '804'),\n('6-166', '\u96fb\u5b50\u96fb\u8def', '856'),\n('9-888', '\u7d71\u8a08\u6578\u5b78', '100');\n\n-- --------------------------------------------------------\n\n--\n-- \u8cc7\u6599\u8868\u7d50\u69cb `Scores`\n--\n\nCREATE TABLE `Scores` (\n  `sno` varchar(3) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `cno` varchar(5) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `degree` decimal(10,1) NOT NULL\n) ENGINE=InnoDB DEFAULT CHARSET=latin1;\n\n--\n-- \u50be\u5370\u8cc7\u6599\u8868\u7684\u8cc7\u6599 `Scores`\n--\n\nINSERT INTO `Scores` (`sno`, `cno`, `degree`) VALUES\n('103', '3-245', 86.0),\n('105', '3-245', 75.0),\n('109', '3-245', 68.0),\n('103', '3-105', 92.0),\n('105', '3-105', 88.0),\n('109', '3-105', 76.0),\n('101', '3-105', 64.0),\n('107', '3-105', 91.0),\n('108', '3-105', 78.0),\n('101', '6-166', 85.0),\n('107', '6-106', 79.0),\n('108', '6-166', 81.0);\n\n-- --------------------------------------------------------\n\n--\n-- \u8cc7\u6599\u8868\u7d50\u69cb `Students`\n--\n\nCREATE TABLE `Students` (\n  `sno` varchar(3) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `sname` varchar(4) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `ssex` varchar(2) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `sbirthday` datetime DEFAULT NULL,\n  `class` varchar(5) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL\n) ENGINE=InnoDB DEFAULT CHARSET=latin1;\n\n--\n-- \u50be\u5370\u8cc7\u6599\u8868\u7684\u8cc7\u6599 `Students`\n--\n\nINSERT INTO `Students` (`sno`, `sname`, `ssex`, `sbirthday`, `class`) VALUES\n('108', '\u6d82\u83ef\u660e', '\u7537', '1977-09-01 00:00:00', '95033'),\n('105', '\u9673\u660c\u570b', '\u7537', '1975-10-02 00:00:00', '95031'),\n('107', '\u738b\u9e97\u6625', '\u5973', '1976-01-23 00:00:00', '95033'),\n('101', '\u674e\u5b50\u8431', '\u7537', '1976-02-20 00:00:00', '95033'),\n('109', '\u738b\u9577\u82b3', '\u5973', '1975-02-10 00:00:00', '95031'),\n('103', '\u8521\u5b50\u4fe1', '\u7537', '1974-06-03 00:00:00', '95031'),\n('108', '\u4f55\u660e\u7693', '\u7537', '1977-09-01 00:00:00', '95033'),\n('105', '\u4faf\u660c\u541b', '\u7537', '1975-10-02 00:00:00', '95031'),\n('107', '\u6797\u7389\u9e97', '\u5973', '1976-01-23 00:00:00', '95033'),\n('101', '\u674e\u6dd1\u82ac', '\u7537', '1976-02-20 00:00:00', '95033'),\n('109', '\u738b\u79c0\u60e0', '\u5973', '1975-02-10 00:00:00', '95031'),\n('103', '\u738b\u5b50\u541b', '\u7537', '1974-06-03 00:00:00', '95031'),\n('108', '\u66fe\u83ef\u570b', '\u7537', '1977-09-01 00:00:00', '95033'),\n('105', '\u9673\u660c\u76db', '\u7537', '1975-10-02 00:00:00', '95031'),\n('107', '\u738b\u9e97\u9e97', '\u5973', '1976-01-23 00:00:00', '95033'),\n('101', '\u674e\u4e88\u8431', '\u7537', '1976-02-20 00:00:00', '95033'),\n('109', '\u738b\u807f\u82b3', '\u5973', '1975-02-10 00:00:00', '95031'),\n('103', '\u9678\u5b50\u6587', '\u7537', '1974-06-03 00:00:00', '95031');\n\n-- --------------------------------------------------------\n\n--\n-- \u8cc7\u6599\u8868\u7d50\u69cb `Teachers`\n--\n\nCREATE TABLE `Teachers` (\n  `tno` varchar(3) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `tname` varchar(4) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `tsex` varchar(2) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,\n  `tbirthday` datetime NOT NULL,\n  `prof` varchar(6) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,\n  `depart` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL\n) ENGINE=InnoDB DEFAULT CHARSET=latin1;\n\n--\n-- \u50be\u5370\u8cc7\u6599\u8868\u7684\u8cc7\u6599 `Teachers`\n--\n\nINSERT INTO `Teachers` (`tno`, `tname`, `tsex`, `tbirthday`, `prof`, `depart`) VALUES\n('804', '\u674e\u5141\u8aa0', '\u7537', '1958-12-02 00:00:00', '\u526f\u6559\u6388', '\u8cc7\u8a0a\u5de5\u7a0b\u7cfb'),\n('856', '\u5f35\u65ed\u4e45', '\u7537', '1969-03-12 00:00:00', '\u8b1b\u5e2b', '\u96fb\u5b50\u5de5\u7a0b\u7cfb'),\n('825', '\u738b\u7167\u840d', '\u5973', '1972-05-05 00:00:00', '\u52a9\u6559', '\u8cc7\u8a0a\u5de5\u7a0b\u7cfb'),\n('831', '\u5289\u51b0\u51b0', '\u5973', '1977-08-14 00:00:00', '\u52a9\u6559', '\u96fb\u5b50\u5de5\u7a0b\u7cfb');\nCOMMIT;\n\n\/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT *\/;\n\/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS *\/;\n\/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION *\/;\n<\/pre>\n\n&nbsp;\n\n\u7df4\u7fd2\u984c\u76ee\uff1a\n\n<ol>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\u7684Sname\u3001Ssex\u548cClass\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u6559\u5e2b\u6240\u6709\u7684\u55ae\u4f4d\u4e14\u4e0d\u91cd\u8907\u7684Depart\u5217\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62Score\u8868\u4e2d\u6210\u7e3e\u572860\u523080\u4e4b\u9593\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62Score\u8868\u4e2d\u6210\u7e3e\u70ba85\u300186\u621688\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u201c95031\u201d\u73ed\u6216\u6027\u5225\u70ba\u201c\u5973\u201d\u7684\u540c\u5b78\u8a18\u9304\u3002<\/li>\n    <li>\u4ee5class\u964d\u5e8f\u67e5\u8a62Students\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u4ee5cno\u5347\u5e8f\u3001degree\u964d\u5e8f\u67e5\u8a62Scores\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u201c95031\u201d\u73ed\u7684\u5b78\u751f\u4eba\u6578\u3002<\/li>\n    <li>\u67e5\u8a62Scores\u8868\u4e2d\u7684\u6700\u9ad8\u5206\u7684\u5b78\u751f\u5b78\u865f\u548c\u8ab2\u7a0b\u865f\u3002<\/li>\n    <li>\u67e5\u8a62\u20183-105\u2019\u865f\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u3002<\/li>\n    <li>\u67e5\u8a62Scores\u8868\u4e2d\u81f3\u5c11\u67095\u540d\u5b78\u751f\u9078\u4fee\u7684\u4e26\u4ee53\u958b\u982d\u7684\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u6578\u3002<\/li>\n    <li>\u67e5\u8a62\u6700\u4f4e\u5206\u5927\u65bc70\uff0c\u6700\u9ad8\u5206\u5c0f\u65bc90\u7684sno\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sname\u3001cno\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sno\u3001cname\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sname\u3001cname\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u201c95033\u201d\u73ed\u6240\u9078\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u6578\u3002<\/li>\n    <li>\u5047\u8a2d\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u5efa\u7acb\u4e86\u4e00\u500bgrade\u8868\uff1a\ncreate table grade(low\u00a0\u00a0 number(3,0), upp\u00a0\u00a0 number(3),rank\u00a0\u00a0 char(1));\ninsert into grade values(90,100,\u2019A\u2019);\ninsert into grade values(80,89,\u2019B\u2019);\ninsert into grade values(70,79,\u2019C\u2019);\ninsert into grade values(60,69,\u2019D\u2019);\ninsert into grade values(0,59,\u2019E\u2019);\ncommit;<\/li>\n    <li>\u73fe\u67e5\u8a62\u6240\u6709\u540c\u5b78\u7684sno\u3001cno\u548crank\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u201c3-105\u201d\u8ab2\u7a0b\u7684\u6210\u7e3e\u9ad8\u65bc\u201c109\u201d\u865f\u540c\u5b78\u6210\u7e3e\u7684\u6240\u6709\u540c\u5b78\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62score\u4e2d\u9078\u5b78\u4e00\u9580\u4ee5\u4e0a\u8ab2\u7a0b\u7684\u540c\u5b78\u4e2d\u5206\u6578\u70ba\u975e\u6700\u9ad8\u5206\u6210\u7e3e\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u6210\u7e3e\u9ad8\u65bc\u5b78\u865f\u70ba\u201c109\u201d\u3001\u8ab2\u7a0b\u865f\u70ba\u201c3-105\u201d\u7684\u6210\u7e3e\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u548c\u5b78\u865f\u70ba108\u7684\u540c\u5b78\u540c\u5e74\u51fa\u751f\u7684\u6240\u6709\u5b78\u751f\u7684sno\u3001sname\u548csbirthday\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u5f35\u65ed\u4e45\u201c\u6559\u5e2b\u4efb\u8ab2\u7684\u5b78\u751f\u6210\u7e3e\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u67d0\u8ab2\u7a0b\u7684\u540c\u5b78\u4eba\u6578\u591a\u65bc5\u4eba\u7684\u6559\u5e2b\u59d3\u540d\u3002<\/li>\n    <li>\u67e5\u8a6295033\u73ed\u548c95031\u73ed\u5168\u9ad4\u5b78\u751f\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u5b58\u5728\u670985\u5206\u4ee5\u4e0a\u6210\u7e3e\u7684\u8ab2\u7a0bcno.<\/li>\n    <li>\u67e5\u8a62\u51fa\u201c\u8cc7\u8a0a\u5de5\u7a0b\u7cfb\u201c\u6559\u5e2b\u6240\u6559\u8ab2\u7a0b\u7684\u6210\u7e3e\u8868\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u8cc7\u8a0a\u5de5\u7a0b\u7cfb\u201d\u8207\u201c\u96fb\u5b50\u5de5\u7a0b\u7cfb\u201c\u4e0d\u540c\u8077\u7a31\u7684\u6559\u5e2b\u7684tname\u548cprof\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u7de8\u865f\u70ba\u201c3-105\u201c\u8ab2\u7a0b\u4e14\u6210\u7e3e\u81f3\u5c11\u9ad8\u65bc\u9078\u4fee\u7de8\u865f\u70ba\u201c3-245\u201d\u7684\u540c\u5b78\u7684cno\u3001sno\u548cdegree,\u4e26\u6309degree\u5f9e\u9ad8\u5230\u4f4e\u6b21\u5e8f\u6392\u5e8f\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u7de8\u865f\u70ba\u201c3-105\u201d\u4e14\u6210\u7e3e\u9ad8\u65bc\u9078\u4fee\u7de8\u865f\u70ba\u201c3-245\u201d\u8ab2\u7a0b\u7684\u540c\u5b78\u7684cno\u3001sno\u548cdegree.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u6559\u5e2b\u548c\u540c\u5b78\u7684sname\u3001ssex\u548csbirthday.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u201c\u5973\u201d\u6559\u5e2b\u548c\u201c\u5973\u201d\u540c\u5b78\u7684sname\u3001ssex\u548csbirthday.<\/li>\n    <li>\u67e5\u8a62\u6210\u7e3e\u6bd4\u8a72\u8ab2\u7a0b\u5e73\u5747\u6210\u7e3e\u4f4e\u7684\u540c\u5b78\u7684\u6210\u7e3e\u8868\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u4efb\u8ab2\u6559\u5e2b\u7684tname\u548cdepart.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u672a\u8b1b\u8ab2\u7684\u6559\u5e2b\u7684tname\u548cdepart.<\/li>\n    <li>\u67e5\u8a62\u81f3\u5c11\u67092\u540d\u7537\u751f\u7684\u73ed\u865f\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u4e0d\u59d3\u201c\u738b\u201d\u7684\u540c\u5b78\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u6bcf\u500b\u5b78\u751f\u7684\u59d3\u540d\u548c\u5e74\u9f61\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u6700\u5927\u548c\u6700\u5c0f\u7684sbirthday\u65e5\u671f\u503c\u3002<\/li>\n    <li>\u4ee5\u73ed\u865f\u548c\u5e74\u9f61\u5f9e\u5927\u5230\u5c0f\u7684\u9806\u5e8f\u67e5\u8a62Students\u8868\u4e2d\u7684\u5168\u90e8\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u7537\u201d\u6559\u5e2b\u53ca\u5176\u6240\u4e0a\u7684\u8ab2\u7a0b\u3002<\/li>\n    <li>\u67e5\u8a62\u6700\u9ad8\u5206\u540c\u5b78\u7684sno\u3001cno\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u548c\u201c\u674e\u8ecd\u201d\u540c\u6027\u5225\u7684\u6240\u6709\u540c\u5b78\u7684sname.<\/li>\n    <li>\u67e5\u8a62\u548c\u201c\u674e\u8ecd\u201d\u540c\u6027\u5225\u4e26\u540c\u73ed\u7684\u540c\u5b78sname.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u9078\u4fee\u201c\u8a08\u7b97\u6a5f\u6982\u8ad6\u201d\u8ab2\u7a0b\u7684\u201c\u7537\u201d\u540c\u5b78\u7684\u6210\u7e3e\u8868<\/li>\n<\/ol>\n\n&nbsp;\n\n<h2>\u89e3\u7b54\uff1a<\/h2>\n\n<ul>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\u7684Sname\u3001Ssex\u548cClass\u5217\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT Sname, Ssex, Class FROM Students;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u6559\u5e2b\u6240\u6709\u7684\u55ae\u4f4d\u4e14\u4e0d\u91cd\u8907\u7684Depart\u5217\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT DISTINCT depart FROM Teachers;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Students\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT * FROM Students;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Score\u8868\u4e2d\u6210\u7e3e\u572860\u523080\u4e4b\u9593\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT *\nFROM Scores\nWHERE degree BETWEEN 60 AND 80;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Score\u8868\u4e2d\u6210\u7e3e\u70ba85\u300186\u621688\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT *\nFROM Scores\nWHERE degree IN (85,86,88);<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u201c95031\u201d\u73ed\u6216\u6027\u5225\u70ba\u201c\u5973\u201d\u7684\u540c\u5b78\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT *\nFROM Students\nWHERE class='95031' OR ssex='\u5973';<\/pre>\n\n<ul>\n    <li>\u4ee5class\u964d\u5e8f\u67e5\u8a62Students\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT *\nFROM Students\nORDER BY class DESC;<\/pre>\n\n<ul>\n    <li>\u4ee5cno\u5347\u5e8f\u3001degree\u964d\u5e8f\u67e5\u8a62Scores\u8868\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT *\nFROM Scores\nORDER BY cno,degree DESC;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u201c95031\u201d\u73ed\u7684\u5b78\u751f\u4eba\u6578\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">SELECT COUNT(1) AS StuNum\nFROM Students\nWHERE class='95031';<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Scores\u8868\u4e2d\u7684\u6700\u9ad8\u5206\u7684\u5b78\u751f\u5b78\u865f\u548c\u8ab2\u7a0b\u7de8\u865f\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT sno,cno\nFROM Scores\nORDER BY degree DESC\nLIMIT 1;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u20183-105\u2019\u865f\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT AVG(degree)\nFROM Scores\nWHERE cno='3-105';<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62Scores\u8868\u4e2d\u81f3\u5c11\u67095\u540d\u5b78\u751f\u9078\u4fee\u7684\u4e26\u4ee53\u958b\u982d\u7684\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u6578\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">SELECT cno,AVG(degree)\nFROM Scores\nWHERE cno LIKE '3%'\nGROUP BY cno\nHAVING COUNT(sno) &gt;= 5;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u6700\u4f4e\u5206\u5927\u65bc70\uff0c\u6700\u9ad8\u5206\u5c0f\u65bc90\u7684sno\u5217\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT sno\nFROM Scores\nGROUP BY sno\nHAVING MAX(degree)&lt;90 AND MIN(degree)&gt;70;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sname\u3001cno\u548cdegree\u5217\u3002<\/li>\n<\/ul>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\">SELECT sname, cno, degree\nFROM Students INNER JOIN Scores \nON(Students.sno=Scores.sno)\nORDER BY sname;<\/pre>\n\n<ul>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sno\u3001cname\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u5b78\u751f\u7684sname\u3001cname\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u201c95033\u201d\u73ed\u6240\u9078\u8ab2\u7a0b\u7684\u5e73\u5747\u5206\u6578\u3002<\/li>\n    <li>\u5047\u8a2d\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u5efa\u7acb\u4e86\u4e00\u500bgrade\u8868\uff1a\ncreate table grade(low\u00a0\u00a0 number(3,0), upp\u00a0\u00a0 number(3),rank\u00a0\u00a0 char(1));\ninsert into grade values(90,100,\u2019A\u2019);\ninsert into grade values(80,89,\u2019B\u2019);\ninsert into grade values(70,79,\u2019C\u2019);\ninsert into grade values(60,69,\u2019D\u2019);\ninsert into grade values(0,59,\u2019E\u2019);\ncommit;<\/li>\n<\/ul>\n\n&nbsp;\n\n<ul>\n    <li>\u73fe\u67e5\u8a62\u6240\u6709\u540c\u5b78\u7684sno\u3001cno\u548crank\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u201c3-105\u201d\u8ab2\u7a0b\u7684\u6210\u7e3e\u9ad8\u65bc\u201c109\u201d\u865f\u540c\u5b78\u6210\u7e3e\u7684\u6240\u6709\u540c\u5b78\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62score\u4e2d\u9078\u5b78\u4e00\u9580\u4ee5\u4e0a\u8ab2\u7a0b\u7684\u540c\u5b78\u4e2d\u5206\u6578\u70ba\u975e\u6700\u9ad8\u5206\u6210\u7e3e\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u6210\u7e3e\u9ad8\u65bc\u5b78\u865f\u70ba\u201c109\u201d\u3001\u8ab2\u7a0b\u865f\u70ba\u201c3-105\u201d\u7684\u6210\u7e3e\u7684\u6240\u6709\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u548c\u5b78\u865f\u70ba108\u7684\u540c\u5b78\u540c\u5e74\u51fa\u751f\u7684\u6240\u6709\u5b78\u751f\u7684sno\u3001sname\u548csbirthday\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u5f35\u65ed\u4e45\u201c\u6559\u5e2b\u4efb\u8ab2\u7684\u5b78\u751f\u6210\u7e3e\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u67d0\u8ab2\u7a0b\u7684\u540c\u5b78\u4eba\u6578\u591a\u65bc5\u4eba\u7684\u6559\u5e2b\u59d3\u540d\u3002<\/li>\n    <li>\u67e5\u8a6295033\u73ed\u548c95031\u73ed\u5168\u9ad4\u5b78\u751f\u7684\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u5b58\u5728\u670985\u5206\u4ee5\u4e0a\u6210\u7e3e\u7684\u8ab2\u7a0bcno.<\/li>\n    <li>\u67e5\u8a62\u51fa\u201c\u8cc7\u8a0a\u5de5\u7a0b\u7cfb\u201c\u6559\u5e2b\u6240\u6559\u8ab2\u7a0b\u7684\u6210\u7e3e\u8868\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u8cc7\u8a0a\u5de5\u7a0b\u7cfb\u201d\u8207\u201c\u96fb\u5b50\u5de5\u7a0b\u7cfb\u201c\u4e0d\u540c\u8077\u7a31\u7684\u6559\u5e2b\u7684tname\u548cprof\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u7de8\u865f\u70ba\u201c3-105\u201c\u8ab2\u7a0b\u4e14\u6210\u7e3e\u81f3\u5c11\u9ad8\u65bc\u9078\u4fee\u7de8\u865f\u70ba\u201c3-245\u201d\u7684\u540c\u5b78\u7684cno\u3001sno\u548cdegree,\u4e26\u6309degree\u5f9e\u9ad8\u5230\u4f4e\u6b21\u5e8f\u6392\u5e8f\u3002<\/li>\n    <li>\u67e5\u8a62\u9078\u4fee\u7de8\u865f\u70ba\u201c3-105\u201d\u4e14\u6210\u7e3e\u9ad8\u65bc\u9078\u4fee\u7de8\u865f\u70ba\u201c3-245\u201d\u8ab2\u7a0b\u7684\u540c\u5b78\u7684cno\u3001sno\u548cdegree.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u6559\u5e2b\u548c\u540c\u5b78\u7684sname\u3001ssex\u548csbirthday.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u201c\u5973\u201d\u6559\u5e2b\u548c\u201c\u5973\u201d\u540c\u5b78\u7684sname\u3001ssex\u548csbirthday.<\/li>\n    <li>\u67e5\u8a62\u6210\u7e3e\u6bd4\u8a72\u8ab2\u7a0b\u5e73\u5747\u6210\u7e3e\u4f4e\u7684\u540c\u5b78\u7684\u6210\u7e3e\u8868\u3002<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u4efb\u8ab2\u6559\u5e2b\u7684tname\u548cdepart.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u672a\u8b1b\u8ab2\u7684\u6559\u5e2b\u7684tname\u548cdepart.<\/li>\n    <li>\u67e5\u8a62\u81f3\u5c11\u67092\u540d\u7537\u751f\u7684\u73ed\u865f\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u4e0d\u59d3\u201c\u738b\u201d\u7684\u540c\u5b78\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u6bcf\u500b\u5b78\u751f\u7684\u59d3\u540d\u548c\u5e74\u9f61\u3002<\/li>\n    <li>\u67e5\u8a62Students\u8868\u4e2d\u6700\u5927\u548c\u6700\u5c0f\u7684sbirthday\u65e5\u671f\u503c\u3002<\/li>\n    <li>\u4ee5\u73ed\u865f\u548c\u5e74\u9f61\u5f9e\u5927\u5230\u5c0f\u7684\u9806\u5e8f\u67e5\u8a62Students\u8868\u4e2d\u7684\u5168\u90e8\u8a18\u9304\u3002<\/li>\n    <li>\u67e5\u8a62\u201c\u7537\u201d\u6559\u5e2b\u53ca\u5176\u6240\u4e0a\u7684\u8ab2\u7a0b\u3002<\/li>\n    <li>\u67e5\u8a62\u6700\u9ad8\u5206\u540c\u5b78\u7684sno\u3001cno\u548cdegree\u5217\u3002<\/li>\n    <li>\u67e5\u8a62\u548c\u201c\u674e\u8ecd\u201d\u540c\u6027\u5225\u7684\u6240\u6709\u540c\u5b78\u7684sname.<\/li>\n    <li>\u67e5\u8a62\u548c\u201c\u674e\u8ecd\u201d\u540c\u6027\u5225\u4e26\u540c\u73ed\u7684\u540c\u5b78sname.<\/li>\n    <li>\u67e5\u8a62\u6240\u6709\u9078\u4fee\u201c\u8a08\u7b97\u6a5f\u6982\u8ad6\u201d\u8ab2\u7a0b\u7684\u201c\u7537\u201d\u540c\u5b78\u7684\u6210\u7e3e\u8868<\/li>\n<\/ul>\n\n<h2>\u53c3\u8003\u8cc7\u6e90\uff1a<\/h2>\n\n<ul>\n    <li><a href=\"http:\/\/yes.nctu.edu.tw\/SQL\/Statement\/Statement.htm\" target=\"_blank\" rel=\"noopener noreferrer\">SQL \u6558\u8ff0<\/a><\/li>\n    <li><a href=\"https:\/\/www.1keydata.com\/tw\/sql\/sql.html\" target=\"_blank\" rel=\"noopener noreferrer\">SQL\u8a9e\u6cd5\u6559\u5b78<\/a><\/li>\n    <li><a href=\"http:\/\/web.nuu.edu.tw\/~carlu\/html\/EasydoMySQL.html\" target=\"_blank\" rel=\"noopener noreferrer\">MySQL\u8cc7\u6599\u5eab\u7cfb\u7d71\u958b\u767c\u7406\u8ad6\u8207\u5be6\u52d9<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>SQL\u7d93\u5178\u7df4\u7fd2\u984c \u8cc7\u6599\u51fa\u8655\uff1aSQL\u7d93\u5178\u7df4\u7fd2\u984c \u8cc7\u6599\u6e96\u5099 \u5efa\u7acbStudents,  &hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[266],"tags":[],"class_list":["post-11335","post","type-post","status-publish","format-standard","hentry","category-266"],"_links":{"self":[{"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/posts\/11335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/comments?post=11335"}],"version-history":[{"count":2,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/posts\/11335\/revisions"}],"predecessor-version":[{"id":13474,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/posts\/11335\/revisions\/13474"}],"wp:attachment":[{"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/media?parent=11335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/categories?post=11335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fgchen.com\/wpedu\/wp-json\/wp\/v2\/tags?post=11335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}