{"height":"190","blog_title":"taedium\u306e\u65e5\u8a18","author_name":"taedium","blog_url":"https://taedium.hatenadiary.org/","url":"https://taedium.hatenadiary.org/entry/20060119/p1","width":"100%","published":"2006-01-19 00:00:00","version":"1.0","type":"rich","categories":["EJB\u5165\u9580\u8a18"],"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","description":"Chapter 9 \u305d\u306e2\u3067\u3059\u3002\u4eca\u65e5\u306f\u6b21\u306e4\u3064\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u898b\u3066\u307f\u307e\u3059\u3002 UniqueConstraint Column JoinColumn JoinColumns 9.1.4 UniqueConstraint Annotation \u3053\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u751f\u6210\u3055\u308c\u308bDDL\u306bUnique\u5236\u7d04\u3092\u3064\u3051\u305f\u3044\u3068\u304d\u306b\u4f7f\u3046\u3088\u3046\u3067\u3059\u3002ElementType\u304c\u7a7a\u306a\u3093\u3067\u3059\u306d\u3002 @Target({}) @Retention(RUNTIME) public @interface UniqueConstraint { String[] columnNames(); }\u3053\u3093\u306a\u611f\u3058\u3067\u4f7f\u3046\u3089\u3057\u3044\u3067\u3059\u3002\u30b3\u30d4\u30da\u3002 @Tabl\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftaedium.hatenadiary.org%2Fentry%2F20060119%2Fp1\" title=\" EJB 3.0(Proposed Final Draft)\u5165\u9580\u8a18 Java Persistence API Chapter 9 \u305d\u306e2 - taedium\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"author_url":"https://blog.hatena.ne.jp/taedium/","title":" EJB 3.0(Proposed Final Draft)\u5165\u9580\u8a18 Java Persistence API Chapter 9 \u305d\u306e2"}