{"id":3237,"date":"2023-11-02T17:20:06","date_gmt":"2023-11-02T09:20:06","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=3237"},"modified":"2023-11-02T17:20:06","modified_gmt":"2023-11-02T09:20:06","slug":"%e6%8e%8c%e6%8f%a1-sql-%e9%9d%a2%e8%af%95%e7%9a%84%e8%89%ba%e6%9c%af%ef%bc%9a%e8%a7%a3%e9%94%81%e5%b8%b8%e8%a7%81%e5%92%8c%e5%a4%8d%e6%9d%82%e6%9f%a5%e8%af%a2%e7%9a%84%e8%a7%a3%e5%86%b3%e6%96%b9","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/mysql\/%e6%8e%8c%e6%8f%a1-sql-%e9%9d%a2%e8%af%95%e7%9a%84%e8%89%ba%e6%9c%af%ef%bc%9a%e8%a7%a3%e9%94%81%e5%b8%b8%e8%a7%81%e5%92%8c%e5%a4%8d%e6%9d%82%e6%9f%a5%e8%af%a2%e7%9a%84%e8%a7%a3%e5%86%b3%e6%96%b9\/","title":{"rendered":"\u638c\u63e1 SQL \u9762\u8bd5\u7684\u827a\u672f\uff1a\u89e3\u9501\u5e38\u89c1\u548c\u590d\u6742\u67e5\u8be2\u7684\u89e3\u51b3\u65b9\u6848"},"content":{"rendered":"
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<\/span>\u5982\u4f55\u67e5\u627e\u6570\u636e\u5e93\u8868\u4e2d\u7684\u91cd\u590d\u8bb0\u5f55\uff1f<\/span><\/span><\/h3>\n

\u4e3a\u4e86\u5728\u6570\u636e\u5e93\u8868\u4e2d\u67e5\u627e\u91cd\u590d\u8bb0\u5f55\uff0c\u6211\u4eec\u9700\u8981\u786e\u8ba4\u91cd\u590d\u9879\u7684\u5b9a\u4e49\u3002\u4f8b\u5982\uff0c\u5728\u4e0b\u9762\u7684\u8054\u7cfb\u4eba\u8868\u4e2d\uff0c\u5e94\u8be5\u5b58\u50a8\u8054\u7cfb\u4eba\u7684\u59d3\u540d\u548c\u7535\u8bdd\u53f7\u7801\uff0c\u5982\u679c\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\uff0c\u5219\u8bb0\u5f55\u88ab\u8ba4\u4e3a\u662f\u91cd\u590d\u7684\uff1a\u59d3\u540d\u548c\u7535\u8bdd\u53f7\u7801\u76f8\u540c<\/strong>\uff0c\u4f46\u5982\u679c\u5176\u4e2d\u4efb\u4f55\u4e00\u4e2a\u4e0d\u540c\uff0c\u5219\u5b83\u4eec\u662f\u552f\u4e00\u7684\u3002<\/p>\n

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\u5728\u4e0b\u9762\u7684\u67e5\u8be2\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86SELECT \u67e5\u8be2\u6765\u9009\u62e9 Contacts \u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u3002\u8fd9\u91cc James\u3001Johnny\u3001Harry \u548c Ron \u88ab\u91cd\u590d\u56db\u6b21\u3002<\/p>\n

<\/span>--\u6240\u6709\u90e8\u95e8\u4ee5\u53ca\u603b\u5de5\u8d44<\/span>SELECT<\/span>b.dept_name,SUM<\/span>(a.salary)as<\/span>'TotalSalary'<\/span>FROM<\/span>EmployeeaFULL<\/span>OUTER<\/span>JOIN<\/span>DepartmentbON<\/span>a.dept_id=b.dept_idGROUP<\/span>BY<\/span>b.dept_name;<\/code><\/pre>\n
\u8fd9\u5c31\u662f\u672c\u6587\u6709\u5173SQL \u67e5\u8be2\u793a\u4f8b\u3001\u7ec3\u4e60\u9898\u548c SQL \u67e5\u8be2\u9762\u8bd5\u9898\u7684\u5168\u90e8\u5185\u5bb9\u3002<\/p>\n<\/section>\n
\u6765\u6e90\uff5chttps:\/\/medium.com\/<\/span><\/p>\n
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\u540e\u7aef\u4e13\u5c5e\u6280\u672f\u7fa4<\/strong><\/span><\/section>
\u6784\u5efa\u9ad8\u8d28\u91cf\u7684\u6280\u672f\u4ea4\u6d41\u793e\u7fa4\uff0c\u6b22\u8fce\u4ece\u4e8b\u7f16\u7a0b\u5f00\u53d1\u3001\u6280\u672f\u62db\u8058HR\u8fdb\u7fa4\uff0c\u4e5f\u6b22\u8fce\u5927\u5bb6\u5206\u4eab\u81ea\u5df1\u516c\u53f8\u7684\u5185\u63a8\u4fe1\u606f\uff0c\u76f8\u4e92\u5e2e\u52a9\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>
\u6587\u660e\u53d1\u8a00\uff0c\u4ee5\u4ea4\u6d41\u6280\u672f<\/code>\u3001\u804c\u4f4d\u5185\u63a8<\/code>\u3001\u884c\u4e1a\u63a2\u8ba8<\/code>\u4e3a\u4e3b<\/p><\/blockquote>
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\u52a0\u6211\u597d\u53cb\uff0c\u62c9\u4f60\u8fdb\u7fa4<\/figcaption><\/figure><\/pre>\n
<\/mp-style-type><\/p>\n
\n
\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 Java\u9762\u8bd5\u9898\u7cbe\u9009              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
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