{"id":302050,"date":"2024-05-20T18:24:56","date_gmt":"2024-05-20T10:24:56","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/302050.html"},"modified":"2024-05-20T18:25:08","modified_gmt":"2024-05-20T10:25:08","slug":"sql-%e8%af%ad%e5%8f%a5%e4%bd%bf%e7%94%a8-linq-%e4%b9%a6%e5%86%99%e7%9a%84%e6%96%b9%e6%b3%95%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/302050.html","title":{"rendered":"Sql \u8bed\u53e5\u4f7f\u7528 linq \u4e66\u5199\u7684\u65b9\u6cd5\u662f\u4ec0\u4e48"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26214239\/31dd9ec6-f906-4edb-bce9-98a38070e9ba.webp\" alt=\"Sql \u8bed\u53e5\u4f7f\u7528 linq \u4e66\u5199\u7684\u65b9\u6cd5\u662f\u4ec0\u4e48\" \/><\/p>\n<p><p>\u5c06SQL\u8bed\u53e5\u8f6c\u6362\u4e3aLINQ\u8868\u8fbe\u5f0f\u4e3b\u8981\u4f9d\u8d56\u4e8e\u5bf9.NET\u4e2dLINQ\uff08\u8bed\u8a00\u96c6\u6210\u67e5\u8be2\uff09\u7684\u7406\u89e3\u548c\u5e94\u7528\u3002LINQ\u63d0\u4f9b\u4e00\u79cd\u67e5\u8be2\u4efb\u4f55\u652f\u6301LINQ\u63d0\u4f9b\u7a0b\u5e8f\uff08\u6bd4\u5982LINQ to Objects\u3001LINQ to SQL\u3001LINQ to XML\u7b49\uff09\u7684\u6570\u636e\u6e90\u7684\u80fd\u529b\u3002<strong>\u6838\u5fc3\u89c2\u70b9\u662f\u7406\u89e3SQL\u8bed\u53e5\u4e2d\u7684\u5173\u952e\u5b57\u5982SELECT\u3001FROM\u3001WHERE\u3001JOIN\u7b49\u5728LINQ\u4e2d\u7684\u5bf9\u5e94\u8868\u8fbe\u65b9\u5f0f\uff0c\u5e76\u8fd0\u7528C#\u6216VB.NET\u7684\u8bed\u6cd5\u7279\u6027\u6765\u6784\u9020\u5bf9\u5e94\u7684LINQ\u8868\u8fbe\u5f0f<\/strong>\u3002\u4ee5<code>SELECT<\/code>\u4e3a\u4f8b\uff0c\u5b83\u5728SQL\u4e2d\u7528\u4e8e\u6307\u5b9a\u8981\u8fd4\u56de\u7684\u5217\uff0c\u800c\u5728LINQ\u4e2d\uff0c\u5219\u901a\u8fc7\u9009\u62e9(Select)\u64cd\u4f5c\u7b26\u5b9e\u73b0\uff0c\u53ef\u4ee5\u7528\u6765\u6307\u5b9a\u8fd4\u56de\u7ed3\u679c\u7684\u5f62\u72b6\u6216\u8fdb\u884c\u6570\u636e\u8f6c\u6362\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u7406\u89e3\u57fa\u672c\u6620\u5c04<\/h3>\n<\/p>\n<p><p>\u5728\u5c06SQL\u8bed\u53e5\u8f6c\u6362\u4e3aLINQ\u67e5\u8be2\u65f6\uff0c\u9996\u5148\u9700\u8981\u7406\u89e3\u4e24\u8005\u4e4b\u95f4\u7684\u4e00\u4e9b\u57fa\u672c\u6620\u5c04\u5173\u7cfb\u3002SQL\u7684\u67e5\u8be2\u7ed3\u6784\u548cLINQ\u6709\u7740\u76f4\u89c2\u4e0a\u7684\u5bf9\u5e94\u5173\u7cfb\u3002<\/p>\n<\/p>\n<ul>\n<li>\n<p><strong><code>SELECT<\/code>\u6620\u5c04\u81f3LINQ\u7684<code>select<\/code>\u5b50\u53e5<\/strong>\uff1a\u5728LINQ\u4e2d\uff0c<code>select<\/code>\u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u67e5\u8be2\u7684\u8fd4\u56de\u7ed3\u679c\u3002\u5982\u679c\u4f60\u60f3\u8981\u4ece\u6570\u636e\u5e93\u4e2d\u9009\u62e9\u7279\u5b9a\u7684\u5217\uff0c\u4f60\u53ef\u4ee5\u5728LINQ\u67e5\u8be2\u7684<code>select<\/code>\u90e8\u5206\u660e\u786e\u6307\u51fa\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5982\uff0cSQL\u8bed\u53e5<code>SELECT Name, Age FROM People<\/code>\u53ef\u4ee5\u8f6c\u6362\u4e3aLINQ\u8868\u8fbe\u5f0f<code>people.Select(p =&gt; new {p.Name, p.Age})<\/code>\uff0c\u8fd9\u91cc<code>people<\/code>\u6307\u7684\u662f\u4e00\u4e2a\u96c6\u5408\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong><code>FROM<\/code>\u6620\u5c04\u81f3LINQ\u67e5\u8be2\u7684\u6570\u636e\u6e90\u5b9a\u4e49<\/strong>\uff1a<code>from<\/code>\u5b50\u53e5\u5728LINQ\u4e2d\u7528\u4e8e\u6307\u5b9a\u67e5\u8be2\u7684\u6570\u636e\u6e90\uff0c\u5b83\u5b9a\u4e49\u4e86\u67e5\u8be2\u4e2d\u7684\u8303\u56f4\u53d8\u91cf\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong><code>WHERE<\/code>\u6620\u5c04\u81f3LINQ\u7684<code>where<\/code>\u5b50\u53e5<\/strong>\uff1a\u7528\u4e8e\u7b5b\u9009\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u8bb0\u5f55\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong><code>JOIN<\/code>\u6620\u5c04\u81f3LINQ\u7684<code>join<\/code>\u5b50\u53e5<\/strong>\uff1a\u5728LINQ\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7<code>join<\/code>\u5b50\u53e5\u6765\u5b9e\u73b0\u4e0d\u540c\u6570\u636e\u6e90\u4e4b\u95f4\u7684\u8fde\u63a5\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u8f6c\u6362\u6761\u4ef6\u67e5\u8be2\uff08WHERE\uff09<\/h3>\n<\/p>\n<p><p>\u5728SQL\u4e2d\uff0c\u8fc7\u6ee4\u6570\u636e\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u8fd9\u901a\u5e38\u901a\u8fc7<code>WHERE<\/code>\u5b50\u53e5\u6765\u5b9e\u73b0\u3002\u5728LINQ\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>where<\/code>\u5b50\u53e5\u6765\u8fbe\u5230\u540c\u6837\u7684\u76ee\u7684\u3002<\/p>\n<\/p>\n<ul>\n<li>\n<p>\u5728LINQ\u67e5\u8be2\u4e2d\u5e94\u7528\u6761\u4ef6\u8fc7\u6ee4\uff0c\u9996\u5148\u9700\u8981\u7406\u89e3\u5982\u4f55\u6784\u9020<code>where<\/code>\u5b50\u53e5\u3002<strong>LINQ\u7684<code>where<\/code>\u5b50\u53e5\u53ef\u4ee5\u63a5\u53d7\u4efb\u4f55\u8fd4\u56de<code>bool<\/code>\u503c\u7684\u8868\u8fbe\u5f0f<\/strong>\uff0c\u8fd9\u4e3a\u6570\u636e\u8fc7\u6ee4\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/p>\n<p><p>\u4e3e\u4e2a\u4f8b\u5b50\uff0cSQL\u8bed\u53e5<code>SELECT * FROM People WHERE Age &gt; 30<\/code>\u53ef\u4ee5\u88ab\u5199\u6210LINQ\u8868\u8fbe\u5f0f<code>people.Where(p =&gt; p.Age &gt; 30)<\/code>\u3002\u8fd9\u4e2aLINQ\u8868\u8fbe\u5f0f\u4f1a\u9009\u51fa\u6240\u6709\u5e74\u9f84\u5927\u4e8e30\u5c81\u7684\u4eba\u3002<\/p>\n<\/p>\n<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001\u5b9e\u73b0\u6570\u636e\u6295\u5f71\uff08SELECT\uff09<\/h3>\n<\/p>\n<p><p>\u6570\u636e\u6295\u5f71\u6d89\u53ca\u5230\u5728\u67e5\u8be2\u7ed3\u679c\u4e2d\u9009\u62e9\u7279\u5b9a\u7684\u5217\u6216\u4ee5\u7279\u5b9a\u7684\u65b9\u5f0f\u5c55\u793a\u6570\u636e\u3002\u5728LINQ\u4e2d\uff0c\u8fd9\u662f\u901a\u8fc7<code>select<\/code>\u64cd\u4f5c\u5b9e\u65bd\u7684\u3002<\/p>\n<\/p>\n<ul>\n<li>\n<p><strong>\u6570\u636e\u6295\u5f71\u5e38\u7528\u4e8e\u8f6c\u6362\u67e5\u8be2\u7ed3\u679c\u7684\u5f62\u72b6<\/strong>\u3002\u901a\u8fc7<code>select<\/code>\u5b50\u53e5\uff0c\u4f60\u53ef\u4ee5\u5b9a\u4e49\u8f93\u51fa\u7ed3\u679c\u7684\u7ed3\u6784\uff0c\u751a\u81f3\u53ef\u4ee5\u5728\u6b64\u8fc7\u7a0b\u4e2d\u8ba1\u7b97\u65b0\u7684\u503c\u3002<\/p>\n<\/p>\n<p><p>\u5047\u5982\u6211\u4eec\u6709\u4e00\u4e2aSQL\u67e5\u8be2<code>SELECT Name, Age FROM People<\/code>\uff0c\u5b83\u53ef\u4ee5\u8f7b\u677e\u8f6c\u6362\u4e3aLINQ\u67e5\u8be2<code>from person in people select new {person.Name, person.Age}<\/code>\u3002\u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u533f\u540d\u7c7b\u578b\u6765\u5b58\u50a8\u6bcf\u4e2a\u4eba\u7684\u59d3\u540d\u548c\u5e74\u9f84\u3002<\/p>\n<\/p>\n<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u5904\u7406\u8fde\u63a5\uff08JOIN\uff09<\/h3>\n<\/p>\n<p><p>\u5728\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u8fde\u63a5\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u5c06\u591a\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u5408\u5e76\u8d77\u6765\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n<\/p>\n<ul>\n<li>\n<p><strong>LINQ\u63d0\u4f9b\u4e86<code>join<\/code>\u5b50\u53e5\u6765\u5b9e\u73b0\u8fde\u63a5\u64cd\u4f5c<\/strong>\u3002\u5728\u4f7f\u7528<code>join<\/code>\u64cd\u4f5c\u65f6\uff0c\u4f60\u9700\u8981\u6307\u5b9a\u5982\u4f55\u5c06\u4e24\u4e2a\u5e8f\u5217\u4e2d\u7684\u5143\u7d20\u76f8\u5339\u914d\uff0c\u4ee5\u53ca\u8fd4\u56de\u7ed3\u679c\u4e2d\u6bcf\u4e2a\u5339\u914d\u5143\u7d20\u5bf9\u7684\u5f62\u72b6\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8981\u8fde\u63a5<code>People<\/code>\u548c<code>Orders<\/code>\u4e24\u4e2a\u8868\uff0c\u4ee5\u83b7\u53d6\u6bcf\u4e2a\u4eba\u7684\u8ba2\u5355\u4fe1\u606f\uff0c\u53ef\u4ee5\u5199\u6210LINQ\u8868\u8fbe\u5f0f<code>from person in people join order in orders on person.Id equals order.PersonId select new {person.Name, order.OrderNumber}<\/code>\u3002\u8fd9\u4f1a\u4e3a\u6bcf\u4e2a\u4eba\u53ca\u5176\u8ba2\u5355\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ed3\u679c\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<\/li>\n<\/ul>\n<p><h3>\u4e94\u3001\u603b\u7ed3\u548c\u8fdb\u9636\u5e94\u7528<\/h3>\n<\/p>\n<p><p>\u5c06SQL\u8bed\u53e5\u8f6c\u6362\u4e3aLINQ\u67e5\u8be2\u9700\u8981\u5bf9\u4e24\u8005\u7684\u67e5\u8be2\u8bed\u8a00\u6709\u6df1\u523b\u7684\u7406\u89e3\u3002\u4e00\u65e6\u638c\u63e1\u4e86LINQ\u67e5\u8be2\u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u4fbf\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63a2\u7d22LINQ\u7684\u9ad8\u7ea7\u7279\u6027\uff0c\u5982\u5206\u7ec4\u3001\u805a\u5408\u64cd\u4f5c\u3001\u5ef6\u8fdf\u6267\u884c\u7b49\uff0c\u4ece\u800c\u5145\u5206\u5229\u7528LINQ\u63d0\u4f9b\u7684\u5f3a\u5927\u529f\u80fd\u6765\u7b80\u5316\u6570\u636e\u5904\u7406\u548c\u67e5\u8be2\u4ee3\u7801\u3002\u968f\u7740\u7ecf\u9a8c\u7684\u79ef\u7d2f\u548c\u5bf9\u4e0d\u540c\u6570\u636e\u6e90LINQ\u63d0\u4f9b\u8005\u7684\u4e86\u89e3\uff0c\u4f60\u5c06\u80fd\u591f\u7075\u6d3b\u5730\u5c06SQL\u67e5\u8be2\u8f6c\u6362\u4e3a\u9ad8\u6548\u4e14\u6613\u4e8e\u7ef4\u62a4\u7684LINQ\u67e5\u8be2\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u5982\u4f55\u5728\u4f7f\u7528Sql\u8bed\u53e5\u65f6\u5229\u7528LINQ\u8fdb\u884c\u7f16\u5199\uff1f<\/strong><\/p>\n<p>\u5728\u4f7f\u7528LINQ\u7f16\u5199SQL\u8bed\u53e5\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528LINQ\u63d0\u4f9b\u7684\u67e5\u8be2\u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u94fe\u4e24\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u901a\u8fc7\u67e5\u8be2\u8868\u8fbe\u5f0f\u53ef\u4ee5\u4ee5\u7c7b\u4f3cSQL\u7684\u65b9\u5f0f\u76f4\u63a5\u7f16\u5199\u67e5\u8be2\u8bed\u53e5\uff0c\u800c\u65b9\u6cd5\u94fe\u5219\u4ee5\u65b9\u6cd5\u7684\u5f62\u5f0f\u94fe\u5f0f\u8c03\u7528\u5404\u79cdLINQ\u64cd\u4f5c\u7b26\u6765\u6784\u5efa\u67e5\u8be2\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u901a\u8fc7\u67e5\u8be2\u8868\u8fbe\u5f0f\u7f16\u5199\u7684LINQ\u67e5\u8be2\u53ef\u4ee5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code class=\"language-csharp\">var query = from employee in dbContext.Employees\n            where employee.Department == &quot;IT&quot;\n            orderby employee.LastName descending\n            select new\n            {\n                Name = employee.FirstName + &quot; &quot; + employee.LastName,\n                Salary = employee.Salary\n            };\n<\/code><\/pre>\n<p>\u800c\u901a\u8fc7\u65b9\u6cd5\u94fe\u7f16\u5199\u7684LINQ\u67e5\u8be2\u53ef\u4ee5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code class=\"language-csharp\">var query = dbContext.Employees\n            .Where(employee =&gt; employee.Department == &quot;IT&quot;)\n            .OrderByDescending(employee =&gt; employee.LastName)\n            .Select(employee =&gt; new \n            {\n                Name = employee.FirstName + &quot; &quot; + employee.LastName,\n                Salary = employee.Salary\n            });\n<\/code><\/pre>\n<p><strong>2. LINQ\u4e0e\u4f20\u7edf\u7684SQL\u8bed\u53e5\u6709\u4f55\u533a\u522b\uff1f<\/strong><\/p>\n<p>LINQ\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u67e5\u8be2\u8bed\u8a00\uff0c\u4e0e\u4f20\u7edf\u7684SQL\u8bed\u53e5\u76f8\u6bd4\u5177\u6709\u4ee5\u4e0b\u51e0\u4e2a\u533a\u522b\uff1a<\/p>\n<ul>\n<li>SQL\u662f\u4e3a\u5173\u7cfb\u578b\u6570\u636e\u5e93\u800c\u8bbe\u8ba1\u7684\uff0c\u800cLINQ\u53ef\u4ee5\u7528\u4e8e\u67e5\u8be2\u5404\u79cd\u6570\u636e\u6e90\uff0c\u5982\u5bf9\u8c61\u96c6\u5408\u3001XML\u6587\u6863\u3001\u6570\u636e\u5e93\u7b49\u3002<\/li>\n<li>SQL\u8bed\u53e5\u901a\u5e38\u7528\u4e8e\u5b9a\u4e49\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u903b\u8f91\u7ed3\u6784\uff0c\u800cLINQ\u66f4\u52a0\u5f3a\u8c03\u67e5\u8be2\u7684\u8bed\u4e49\u548c\u8868\u8fbe\u5f0f\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n<li>\u901a\u8fc7\u4f7f\u7528LINQ\uff0c\u53ef\u4ee5\u5728\u7f16\u8bd1\u671f\u95f4\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\uff0c\u51cf\u5c11\u8fd0\u884c\u65f6\u9519\u8bef\u548c\u8f6c\u6362\u95ee\u9898\u3002<\/li>\n<li>LINQ\u5177\u6709\u66f4\u5f3a\u5927\u7684\u8868\u8fbe\u80fd\u529b\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u533f\u540d\u7c7b\u578b\u3001\u805a\u5408\u64cd\u4f5c\u548c\u81ea\u5b9a\u4e49\u6269\u5c55\u65b9\u6cd5\u7b49\u529f\u80fd\u8fdb\u884c\u66f4\u7075\u6d3b\u7684\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<p><strong>3. LINQ\u67e5\u8be2\u5982\u4f55\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\uff1f<\/strong><\/p>\n<p>\u5728\u4f7f\u7528LINQ\u8fdb\u884c\u6570\u636e\u5e93\u67e5\u8be2\u65f6\uff0c\u9700\u8981\u4f7f\u7528LINQ\u63d0\u4f9b\u7684\u63d0\u4f9b\u7a0b\u5e8f\uff08Provider\uff09\u6765\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\u3002\u4e0d\u540c\u7684\u6570\u636e\u5e93\u5728LINQ\u652f\u6301\u65b9\u9762\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u901a\u5e38\u9700\u8981\u4f7f\u7528\u76f8\u5e94\u6570\u636e\u5e93\u7684\u63d0\u4f9b\u7a0b\u5e8f\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4f7f\u7528Entity Framework\u4f5c\u4e3aLINQ\u7684\u6570\u636e\u8bbf\u95ee\u5c42\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u4ee3\u7801\u4e2d\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32\u548c\u751f\u6210\u6570\u636e\u5e93\u4e0a\u4e0b\u6587\u6765\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u5728LINQ\u67e5\u8be2\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u751f\u6210\u7684\u6570\u636e\u5e93\u4e0a\u4e0b\u6587\u8bbf\u95ee\u6570\u636e\u5e93\u8868\u5e76\u6267\u884c\u5404\u79cd\u67e5\u8be2\u64cd\u4f5c\u3002<\/p>\n<pre><code class=\"language-csharp\">\/\/ \u521d\u59cb\u5316\u6570\u636e\u5e93\u4e0a\u4e0b\u6587\nvar dbContext = new MyDbContext();\n\n\/\/ \u67e5\u8be2\u793a\u4f8b\nvar query = from employee in dbContext.Employees\n            where employee.Department == &quot;IT&quot;\n            orderby employee.LastName descending\n            select new\n            {\n                Name = employee.FirstName + &quot; &quot; + employee.LastName,\n                Salary = employee.Salary\n            };\n\n\/\/ \u6267\u884c\u67e5\u8be2\nvar result = query.ToList();\n<\/code><\/pre>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u901a\u8fc7LINQ\u548c\u6570\u636e\u5e93\u63d0\u4f9b\u7a0b\u5e8f\u7684\u914d\u5408\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u8fdb\u884c\u6570\u636e\u5e93\u67e5\u8be2\u548c\u64cd\u4f5c\uff0c\u5e76\u4e14\u5177\u6709\u66f4\u5f3a\u7684\u7c7b\u578b\u5b89\u5168\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5c06SQL\u8bed\u53e5\u8f6c\u6362\u4e3aLINQ\u8868\u8fbe\u5f0f\u4e3b\u8981\u4f9d\u8d56\u4e8e\u5bf9.NET\u4e2dLINQ\uff08\u8bed\u8a00\u96c6\u6210\u67e5\u8be2\uff09\u7684\u7406\u89e3\u548c\u5e94\u7528\u3002LINQ\u63d0\u4f9b\u4e00\u79cd\u67e5 [&hellip;]","protected":false},"author":3,"featured_media":302068,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/302050"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=302050"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/302050\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/302068"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=302050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=302050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=302050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}