{"id":73938,"date":"2026-02-08T20:20:22","date_gmt":"2026-02-08T12:20:22","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/73938.html"},"modified":"2026-02-08T20:20:22","modified_gmt":"2026-02-08T12:20:22","slug":"%e5%b8%b8%e7%94%a8%e7%9a%84-sql-%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/73938.html","title":{"rendered":"\u5e38\u7528\u7684 SQL \u8bed\u53e5"},"content":{"rendered":"<h4>\u5e38\u7528\u7684 SQL \u8bed\u53e5<\/h4>\n<p>SQL&#xff08;Structured Query Language&#xff09;\u662f\u7528\u4e8e\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u6807\u51c6\u8bed\u8a00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684 SQL \u8bed\u53e5\u5206\u7c7b\u548c\u793a\u4f8b&#xff1a;<\/p>\n<h5>\u6570\u636e\u67e5\u8be2&#xff08;SELECT&#xff09;<\/h5>\n<p>\u7528\u4e8e\u4ece\u6570\u636e\u5e93\u4e2d\u68c0\u7d22\u6570\u636e\u3002<\/p>\n<p><span class=\"token keyword\">SELECT<\/span> column1<span class=\"token punctuation\">,<\/span> column2 <span class=\"token keyword\">FROM<\/span> table_name <span class=\"token keyword\">WHERE<\/span> condition<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">SELECT<\/span> name<span class=\"token punctuation\">,<\/span> age <span class=\"token keyword\">FROM<\/span> users <span class=\"token keyword\">WHERE<\/span> age <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">18<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u6570\u636e\u63d2\u5165&#xff08;INSERT&#xff09;<\/h5>\n<p>\u7528\u4e8e\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u8bb0\u5f55\u3002<\/p>\n<p><span class=\"token keyword\">INSERT<\/span> <span class=\"token keyword\">INTO<\/span> table_name <span class=\"token punctuation\">(<\/span>column1<span class=\"token punctuation\">,<\/span> column2<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">VALUES<\/span> <span class=\"token punctuation\">(<\/span>value1<span class=\"token punctuation\">,<\/span> value2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">INSERT<\/span> <span class=\"token keyword\">INTO<\/span> users <span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">VALUES<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Alice&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">25<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u6570\u636e\u66f4\u65b0&#xff08;UPDATE&#xff09;<\/h5>\n<p>\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u7684\u73b0\u6709\u8bb0\u5f55\u3002<\/p>\n<p><span class=\"token keyword\">UPDATE<\/span> table_name <span class=\"token keyword\">SET<\/span> column1 <span class=\"token operator\">&#061;<\/span> value1 <span class=\"token keyword\">WHERE<\/span> condition<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">UPDATE<\/span> users <span class=\"token keyword\">SET<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">26<\/span> <span class=\"token keyword\">WHERE<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;Alice&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u6570\u636e\u5220\u9664&#xff08;DELETE&#xff09;<\/h5>\n<p>\u7528\u4e8e\u4ece\u8868\u4e2d\u5220\u9664\u8bb0\u5f55\u3002<\/p>\n<p><span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> table_name <span class=\"token keyword\">WHERE<\/span> condition<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> users <span class=\"token keyword\">WHERE<\/span> age <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">18<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u8868\u64cd\u4f5c<\/h5>\n<p>\u521b\u5efa\u8868&#xff1a;<\/p>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> table_name <span class=\"token punctuation\">(<\/span><br \/>\n    column1 datatype<span class=\"token punctuation\">,<\/span><br \/>\n    column2 datatype<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> users <span class=\"token punctuation\">(<\/span><br \/>\n    id <span class=\"token keyword\">INT<\/span> <span class=\"token keyword\">PRIMARY<\/span> <span class=\"token keyword\">KEY<\/span><span class=\"token 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