{"id":104,"date":"2025-03-25T18:45:58","date_gmt":"2025-03-25T10:45:58","guid":{"rendered":"https:\/\/zd1269878.noblogs.org\/?p=104"},"modified":"2025-10-21T10:32:21","modified_gmt":"2025-10-21T02:32:21","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e5%8e%9f%e7%90%86-%e7%ac%ac%e4%b8%89%e7%ab%a0-ppt%e6%95%b4%e7%90%86","status":"publish","type":"post","link":"https:\/\/zd1269878.noblogs.org\/en-US\/post\/2025\/03\/25\/%e6%95%b0%e6%8d%ae%e5%ba%93%e5%8e%9f%e7%90%86-%e7%ac%ac%e4%b8%89%e7%ab%a0-ppt%e6%95%b4%e7%90%86\/","title":{"rendered":"\u6570\u636e\u5e93\u539f\u7406-\u7b2c\u4e09\u7ae0-PPT\u6574\u7406"},"content":{"rendered":"

SQL\u8bed\u8a00\u521d\u6b65\u77e5\u8bc6\u70b9\u4e0e\u8003\u70b9\u5f52\u7eb3<\/h3>\n

\u4e00\u3001SQL<\/strong>\u6982\u8ff0<\/strong><\/h4>\n
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  1. SQL<\/strong>\u7b80\u4ecb<\/strong><\/li>\n<\/ol>\n
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      • \u5b9a\u4e49<\/strong>\uff1a\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff08Structured Query Language\uff09\uff0c\u7528\u4e8e\u7ba1\u7406\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u6807\u51c6\u8bed\u8a00\u3002<\/li>\n
      • \u5386\u53f2\u4e0e\u6807\u51c6\u5316<\/strong>\uff1a\n
          \n
        • 1970\u5e74\uff0cE.F.Codd\u63d0\u51fa\u5173\u7cfb\u6a21\u578b\uff1b1974\u5e74\u7531Boyce\u548cChamberlin\u8bbe\u8ba1\u521d\u7248\uff08SEQUEL\uff09\u3002<\/li>\n
        • 1986\u5e74ANSI\u53d1\u5e03\u9996\u4e2a\u6807\u51c6\uff08SQL-86\uff09\uff0c\u540e\u7eed\u7248\u672c\u5305\u62ecSQL-92<\/code> \u6b63\u5728\u4f7f\u7528\u7684\u6807\u51c6\uff08SQL2\uff09\u3001SQL:1999\uff08\u652f\u6301\u9762\u5411\u5bf9\u8c61\uff09\u3001SQL:2003\uff08\u652f\u6301XML\uff09\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n
        • \u7279\u70b9<\/strong>\uff1a\n
            \n
          • \u4e00\u4f53\u5316<\/strong>\uff1a\u96c6DDL\u3001DML\u3001DCL\u4e8e\u4e00\u4f53\u3002<\/li>\n
          • \u975e\u8fc7\u7a0b\u5316<\/strong>\uff1a\u7528\u6237\u53ea\u9700\u8bf4\u660e\u201c\u505a\u4ec0\u4e48\u201d\uff0c\u65e0\u9700\u6307\u5b9a\u201c\u600e\u4e48\u505a\u201d\u3002<\/li>\n
          • \u9762\u5411\u96c6\u5408<\/strong>\uff1a\u64cd\u4f5c\u5bf9\u8c61\u662f\u6570\u636e\u96c6\u5408\u800c\u975e\u5355\u6761\u8bb0\u5f55\u3002<\/li>\n
          • \u4e24\u79cd\u4f7f\u7528\u65b9\u5f0f<\/strong>\uff1a\u81ea\u542b\u5f0f\u8bed\u8a00\uff08\u72ec\u7acb\u4f7f\u7528\uff09\u548c\u5d4c\u5165\u5f0f\u8bed\u8a00\uff08\u5d4c\u5165\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
              \n
            1. SQL<\/strong>\u8bed\u8a00\u5206\u7c7b<\/strong><\/li>\n<\/ol>\n\n\n\n\n\n\n\n
              \u7c7b\u522b<\/td>\n\u529f\u80fd<\/td>\n\u5173\u952e\u8bed\u53e5<\/td>\n<\/tr>\n<\/thead>\n
              DDL<\/strong><\/td>\n\u6570\u636e\u5b9a\u4e49<\/td>\nCREATE, ALTER, DROP<\/td>\n<\/tr>\n
              DML<\/strong><\/td>\n\u6570\u636e\u64cd\u4f5c<\/td>\nSELECT, INSERT, UPDATE, DELETE<\/td>\n<\/tr>\n
              DCL<\/strong><\/td>\n\u6570\u636e\u63a7\u5236<\/td>\nGRANT, REVOKE<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              \u4e8c\u3001\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff08DDL<\/strong>\uff09<\/strong><\/h4>\n
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              1. \u57fa\u672c\u8868\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n
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                • \n
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                  • \u521b\u5efa\u8868<\/strong>\uff1a<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                      \n
                    • CREATETABLE\u8868\u540d (
                      \n\u5217\u540d1 \u6570\u636e\u7c7b\u578b [\u7ea6\u675f],
                      \n\u5217\u540d2 \u6570\u636e\u7c7b\u578b [\u7ea6\u675f],
                      \n…
                      \n[PRIMARY KEY (\u5217\u540d),]
                      \n[FOREIGN KEY (\u5217\u540d) REFERENCES \u7236\u8868\u540d(\u5217\u540d),]
                      \n[CHECK (\u6761\u4ef6),]
                      \n);<\/li>\n<\/ul>\n
                        \n
                      • \n
                          \n
                        • \n
                            \n
                          • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                              \n
                            • CREATETABLE Student (
                              \nsno CHAR(8) NOT NULL,
                              \nsname VARCHAR(20) NOT NULL,
                              \nsage NUMERIC(3,0),
                              \nssex CHAR(2),
                              \nclno CHAR(6),
                              \nPRIMARY KEY (sno)
                              \n);<\/li>\n<\/ul>\n
                                \n
                              • \n
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                                • \u4fee\u6539\u8868<\/strong>\uff1a\n
                                    \n
                                  • \u6dfb\u52a0\u5217<\/strong>\uff1aALTER TABLE \u8868\u540d ADD \u5217\u540d \u6570\u636e\u7c7b\u578b [\u7ea6\u675f];<\/li>\n
                                  • \u5220\u9664\u5217<\/strong>\uff1aALTER TABLE \u8868\u540d DROP COLUMN \u5217\u540d;<\/li>\n
                                  • \u4fee\u6539\u5217\u7c7b\u578b<\/strong>\uff1aALTER TABLE \u8868\u540d ALTER COLUMN \u5217\u540d \u65b0\u6570\u636e\u7c7b\u578b;<\/li>\n<\/ul>\n<\/li>\n
                                  • \u5220\u9664\u8868<\/strong>\uff1aDROP TABLE \u8868\u540d;\uff08\u5220\u9664\u8868\u7ed3\u6784\u53ca\u6570\u636e\uff0c\u4e0d\u53ef\u9006\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                                      \n
                                    1. \u7d22\u5f15\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n