{"image_url":null,"type":"rich","blog_title":"Crayon's Monologue","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcrayon.hatenadiary.com%2Fentry%2F2021%2F03%2F26%2F125326\" title=\"Functional Programming w/ C# LINQ - \u5de6\u7d50\u5408 Left Join \u306e\u7c21\u6613\u8a18\u6cd5 - Crayon&#39;s Monologue\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"C# 9.0, .NET 5.0, .Entity Framework Core 5.0 \u3092\u4f7f\u3063\u3066\u6570\u30f6\u6708\u3002\u5f53\u521d\u62b1\u3044\u3066\u3044\u305f LINQ to Entities \u306e\u6a5f\u80fd\u5411\u4e0a\u3078\u306e\u671f\u5f85\u306f\u6253\u3061\u7815\u304b\u308c\u305f\u304c\u3001\u305d\u308c\u3067\u3082 EF 6.0 \u3084 EF Core 2.0 \u306b\u6bd4\u3079\u305f\u3089\u4f7f\u3044\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u308b\u3088\u3046\u306a\u6c17\u304c\u3059\u308b\u3002\u672c\u683c\u7684\u306b\u4f7f\u3046\u306b\u3042\u305f\u308a\u3001\u5c11\u3057\u5de5\u592b\u3092\u3059\u308b\u3002 \u5de6\u7d50\u5408 Left Join \u306e\u7c21\u6613\u8a18\u6cd5 (syntax sugar) LINQ to Entities \u3067\u306e\u5de6\u7d50\u5408\u306f .GroupJoin() \uff11\u3064\u3067\u306f\u6e08\u307e\u305a\u3001 .GroupJoin() \u3068 .SelectMany() \u306e\u5408\u308f\u305b\u6280\u306b\u306a\u308b\u306e\u3060\u304c\u3001\u8aad\u307f\u3065\u3089\u3044\u3057\u3001\u66f8\u304d\u3065\u3089\u3044\u3002\u2026","author_url":"https://blog.hatena.ne.jp/Crayon/","provider_url":"https://hatena.blog","height":"190","provider_name":"Hatena Blog","version":"1.0","blog_url":"https://crayon.hatenadiary.com/","categories":["Computer"],"published":"2021-03-26 12:53:26","width":"100%","url":"https://crayon.hatenadiary.com/entry/2021/03/26/125326","title":"Functional Programming w/ C# LINQ - \u5de6\u7d50\u5408 Left Join \u306e\u7c21\u6613\u8a18\u6cd5","author_name":"Crayon"}