. . . . . "\uAD00\uACC4 \uBAA8\uB378\uC5D0\uC11C \uAD00\uACC4(relation)\uB294 \uB3D9\uC77C\uD55C \uAD6C\uC870\uB85C \uC774\uB8E8\uC5B4\uC9C4 \uD29C\uD50C\uC758 \uC9D1\uD569\uC744 \uB9D0\uD55C\uB2E4. \uAC12\uC73C\uB85C\uC11C\uC758 \uAD00\uACC4\uB97C \u2018\uAD00\uACC4\uAC12\u2019(relation value)\uB77C\uACE0 \uD558\uBA70, \uAD00\uACC4\uAC12\uC744 \uAC12\uC73C\uB85C \uAC00\uC9C0\uB294 \uBCC0\uC218\uB97C \u2018\u2019(relvar, relation variable)\uB77C\uACE0 \uD55C\uB2E4. \uC18D\uC131\uBA85\uACFC \uC5F0\uACB0\uB41C \uB3C4\uBA54\uC778(\uC5F4)\uB4E4\uC744 \uC815\uC758\uD55C \uAC83\uC740 \u2018\uAD00\uACC4 \uC2A4\uD0A4\uB9C8\u2019(relation schema)\uB77C\uACE0 \uBD88\uB9B0\uB2E4. \uB54C\uB85C\uB294 \uAD00\uACC4 \uC2A4\uD0A4\uB9C8\uB294 \uAD00\uACC4 \uADF8 \uC790\uCCB4\uC758 \uC774\uB984\uC5D0 \uD3EC\uD568\uB418\uAE30\uB3C4 \uD55C\uB2E4. \uC774\uB7EC\uD55C \uAD00\uACC4 \uC2A4\uD0A4\uB9C8\uB294 \u2018\uD14C\uC774\uBE14 \uC2A4\uD0A4\uB9C8\u2019(table schema)\uB85C\uB3C4 \uBD88\uB9AC\uAE30\uB3C4 \uD55C\uB2E4. \uAD00\uACC4 \uB370\uC774\uD130\uBCA0\uC774\uC2A4\uC758 \uB370\uC774\uD130\uBCA0\uC774\uC2A4 \uC5B8\uC5B4\uC778 SQL\uC5D0\uC11C\uB294 \uAD00\uACC4 \uBCC0\uC218\uC640 \uAC70\uC758 \uAC19\uC740 \uC758\uBBF8\uB85C \uD14C\uC774\uBE14\uC774\uB77C\uB294 \uC6A9\uC5B4\uAC00 \uC0AC\uC6A9\uB418\uACE0 \uC788\uB2E4. \uBB38\uB9E5\uC5D0 \uB530\uB77C\uC11C \u2018\uAD00\uACC4\uBCC0\uC218\u2019\uB97C \u2018\uAD00\uACC4\u2019\uB77C\uACE0 \uBD80\uB974\uAE30\uB3C4 \uD558\uACE0 \u2018\uAD00\uACC4\uAC12\u2019\uC744 \uAD00\uACC4\uB77C\uACE0 \uBD80\uB974\uAE30\uB3C4 \uD55C\uB2E4. \uAE30\uD0C0 \uB370\uC774\uD130\uBCA0\uC774\uC2A4\uC758 \uAD00\uACC4\uB294 \uB2E4\uC74C\uACFC \uAC19\uC740 \uAC83\uC744 \uB9D0\uD560 \uC218 \uC788\uB2E4. \n* \uAD00\uACC4\uBCC0\uC218\uB97C \uAC12\uC73C\uB85C \uAC16\uB294 \uAD00\uACC4\uAC12\uC740 \uC2DC\uAC04\uC5D0 \uB530\uB77C \uBCC0\uD654\uD55C\uB2E4. \n* \uAD00\uACC4\uBCC0\uC218\uB294 \uB370\uC774\uD130 \uC815\uC758 \uC5B8\uC5B4(DDL)\uB97C \uC0AC\uC6A9\uD558\uC5EC \uC815\uC758\uD560 \uC218 \uC788\uB2E4. \n* \uC81C\uBAA9(heading)\uC740 \uD2B9\uC815 \uC18D\uC131(\uC5F4) \uC774 \uC815\uB82C\uB418\uC9C0 \uC54A\uC740 \uC9D1\uD569\uC774\uB2E4. \n* \uAD00\uACC4\uAC12\uC744 \uAD6C\uC131\uD558\uB294 \uD29C\uD50C\uC758 \uC9D1\uD569\uC744 \uBCF8\uCCB4 (body)\uB77C\uACE0 \uD55C\uB2E4. \uC989 \uAD00\uACC4 \uAC12\uC740 \uC81C\uBAA9\uACFC \uBCF8\uCCB4\uB85C \uAD6C\uC131\uB418\uC5B4\uC788\uB2E4. \n* \uD29C\uD50C\uC740 0\uAC1C \uC774\uC0C1\uC758 \uC18D\uC131\uC758 \uC9D1\uD569\uC73C\uB85C \uAD6C\uC131\uB41C \uB370\uC774\uD130 \uAD6C\uC870\uC774\uB2E4. \n* \uC18D\uC131(attribute)\uC740 \uC18D\uC131\uBA85\uACFC \uC815\uC758\uC601\uC5ED \uC774\uB984 \uC5F4\uC774\uB2E4. \n* \uC815\uC758\uC601\uC5ED(domain)\uC740 \uB370\uC774\uD130 \uD615\uC2DD\uACFC \uAC19\uC740 \uC758\uBBF8\uB85C \uC0DD\uAC01\uD574\uB3C4 \uC88B\uB2E4. \n* \uC18D\uC131\uC740 \uADF8 \uC815\uC758\uC601\uC5ED\uC5D0 \uC801\uC6A9\uB418\uB294 \uD558\uC704\uC758 \uC18D\uC131 \uAC12\uC744 \uAC00\uC9C4\uB2E4. \n* \uC18D\uC131 \uAC12\uC740 \uC2A4\uCE7C\uB77C \uAC12\uC774\uB098 \uB354 \uBCF5\uC7A1\uD55C \uAD6C\uC870\uB97C \uAC00\uC9C0\uB294 \uAC12\uC774\uB2E4. \n* \uC81C\uBAA9\uC744 \uAD6C\uC131\uD558\uB294 \uC18D\uC131\uC758 \uC218\uB97C \uCC28\uC218(degree)\uB77C\uACE0 \uD55C\uB2E4. \n* \uAD00\uACC4\uAC12\uC758 \uCC28\uC218\uB294 0 \uB610\uB294 \uC591\uC758 \uC815\uC218\uC774\uB2E4. \n* \uCC28\uC218\uAC00 n\uC778 \uAD00\uACC4 \uAC12\uC744 n\uD56D \uAD00\uACC4(n-ary relation)\uB77C\uACE0 \uD55C\uB2E4. \n* \uAD00\uACC4\uAC12\uC744 \uAD6C\uC131\uD558\uB294 \uD29C\uD50C \uC218\uB97C \uB18D\uB3C4 (cardinality)\uB77C\uACE0 \uD55C\uB2E4. \n* \uAD00\uACC4\uAC12\uC758 \uB18D\uB3C4\uB294 0 \uB610\uB294 \uC591\uC758 \uC815\uC218\uC774\uB2E4. \n* \uAD00\uACC4\uAC12\uC740 \uC911\uBCF5 \uD29C\uD50C\uC774 \uC874\uC7AC\uD558\uC9C0 \uC54A\uB294\uB2E4. \n* \uAD00\uACC4 \uAC12\uC744 \uAD6C\uC131\uD558\uB294 \uAC01\uAC01\uC758 \uC5F4\uC740 \uD2B9\uC815\uD55C \uD558\uB098 \uC774\uC0C1\uC758 \uC18D\uC131 \uC9D1\uD569\uC73C\uB85C \uC2DD\uBCC4\uB41C\uB2E4. \uC774 \uC18D\uC131 \uC9D1\uD569\uC744 \uD6C4\uBCF4 \uD0A4(candidate key)\uB77C\uACE0 \uD55C\uB2E4."@ko . . . . . . . "\u041E\u0442\u043D\u043E\u0448\u0435\u0301\u043D\u0438\u0435 \u2014 \u0444\u0443\u043D\u0434\u0430\u043C\u0435\u043D\u0442\u0430\u043B\u044C\u043D\u043E\u0435 \u043F\u043E\u043D\u044F\u0442\u0438\u0435 \u0440\u0435\u043B\u044F\u0446\u0438\u043E\u043D\u043D\u043E\u0439 \u043C\u043E\u0434\u0435\u043B\u0438 \u0434\u0430\u043D\u043D\u044B\u0445. \u041F\u043E \u044D\u0442\u043E\u0439 \u043F\u0440\u0438\u0447\u0438\u043D\u0435 \u043C\u043E\u0434\u0435\u043B\u044C \u0438 \u043D\u0430\u0437\u044B\u0432\u0430\u0435\u0442\u0441\u044F \u0440\u0435\u043B\u044F\u0446\u0438\u043E\u043D\u043D\u043E\u0439 (\u043E\u0442 \u0430\u043D\u0433\u043B. relation \u2014 \u00AB\u043E\u0442\u043D\u043E\u0448\u0435\u043D\u0438\u0435\u00BB)."@ru . . . . "Formale Grundlage der Relation im Sinne einer Datenbankrelation ist die mathematische Definition und bildet die Basis der relationalen Algebra, die von Edgar F. Codd entwickelt wurde. Eine Relation besteht aus Tupeln, Tupeln wiederum werden durch Attribute beschrieben, welche den Typ (m\u00F6glichen Attributwerte) festlegt und mit einem Attributnamen beschreibt. Im Datenbankbereich unterscheiden sich die Begriffe Relation (Engl. relation) und Beziehung (Engl. relationship); diese begriffliche Trennung wird nicht immer genau gehandhabt."@de . . . . . . "\u5728\u5173\u7CFB\u6A21\u578B\u4E2D\uFF0C\u5173\u7CFB\u662F\u63CF\u8FF0\u73B0\u5B9E\u4E16\u754C\u7684\u5B9E\u4F53\u53CA\u5176\u4E4B\u95F4\u5404\u79CD\u8054\u7CFB\u7684\u5355\u4E00\u7684\u6570\u636E\u7ED3\u6784\u3002\u7531\u5173\u7CFB\u7684\u540D\u79F0\u548C\u4E00\u7EC4\u5177\u6709\u5171\u540C\u5C5E\u6027\u7684\u65E0\u5E8F\u7684\u591A\u5143\u7EC4\u6784\u6210\u3002\u5173\u7CFB\u53EF\u4EE5\u770B\u505A\u662F\u4E00\u4E2A\u7B1B\u5361\u5C14\u79EF\u7684\u6709\u9650\u5B50\u96C6\uFF0C\u7B1B\u5361\u5C14\u79EF\u4E2D\u7684\u5143\u7EC4\u5E76\u4E0D\u662F\u5168\u90FD\u6709\u610F\u4E49\uFF0C\u53EA\u6709\u6709\u610F\u4E49\u7684\u90A3\u4E9B\u624D\u80FD\u6210\u4E3A\u5173\u7CFB\u3002 \u4F8B\u5982\u7ED9\u5B9A\u4E24\u4E2A\u57DF\uFF1AX1 = {1\uFF0C2\uFF0C3}\u548CX2 = {\u4E00\uFF0C\u4E8C\uFF0C\u4E09}\u8FD9\u4E24\u4E2A\u57DF\u7684\u7B1B\u5361\u5C14\u79EF\u662F\u4E00\u4E2A\u75319\u4E2A\u4E8C\u5143\u7EC4\u7EC4\u6210\u7684\u96C6\u5408\uFF1AX1 \u00D7 X2 = {\uFF081\uFF0C\u4E00\uFF09\uFF0C\uFF081\uFF0C\u4E8C\uFF09\uFF0C\uFF081\uFF0C\u4E09\uFF09\uFF0C\uFF082\uFF0C\u4E00\uFF09\uFF0C\uFF082\uFF0C\u4E8C\uFF09\uFF0C\uFF082\uFF0C\u4E09\uFF09\uFF0C\uFF083\uFF0C\u4E00\uFF09\uFF0C\uFF083\uFF0C\u4E8C\uFF09\uFF0C\uFF083\uFF0C\u4E09\uFF09}\u4E5F\u53EF\u4EE5\u5217\u4E00\u5F20\u4E8C\u7EF4\u8868 \u5982\u679C\u5B9A\u4E49\u4E00\u4E2A\u963F\u62C9\u4F2F\u6570\u5B57\u4E0E\u5176\u5BF9\u5E94\u7684\u6C49\u5B57\u6570\u5B57\u5728\u4E00\u8D77\u624D\u6709\u610F\u4E49\uFF0C\u90A3\u4E48\u4E0A\u97629\u4E2A\u4E8C\u5143\u7EC4\u4E2D\u53EA\u67093\u4E2A\u662F\u6709\u610F\u4E49\u7684\uFF0C\u5C06\u8FD9\u79CD\u5173\u7CFB\u53D6\u540D\u4E3A\u201C\u6570\u5B57\u201D\uFF0C\u5219\u53EF\u5F97\uFF1A \u8FD9\u79CD\u5173\u7CFB\u4E5F\u53EF\u8868\u793A\u4E3A\uFF1A\u6570\u5B57\uFF08\u963F\u62C9\u4F2F\u6570\u5B57\uFF0C\u6C49\u5B57\u6570\u5B57\uFF09\u3002\u8FD9\u4E2A\u5173\u7CFB\u4E2D\u7684\u5019\u9009\u7801\u6709\u4E24\u4E2A\uFF1A\u963F\u62C9\u4F2F\u6570\u5B57\u548C\u6C49\u5B57\u6570\u5B57\uFF0C\u90FD\u53EF\u4EE5\u9009\u505A\u8FD9\u4E2A\u5173\u7CFB\u7684\u4E3B\u7801\u3002"@zh . "\u95A2\u4FC2\uFF08\u304B\u3093\u3051\u3044\u3001\u30EA\u30EC\u30FC\u30B7\u30E7\u30F3\u3001\u82F1: relation\uFF09\u3068\u306F\u95A2\u4FC2\u30E2\u30C7\u30EB\uFF08\u30EA\u30EC\u30FC\u30B7\u30E7\u30CA\u30EB\u30E2\u30C7\u30EB\uFF09\u306B\u304A\u3044\u3066\u3001\u4E00\u3064\u306E\u898B\u51FA\u3057\u30680\u4EE5\u4E0A\u306E\u540C\u3058\u578B\u306E\u7D44 (\u30BF\u30D7\u30EB\u3001\u884C) \u306E\u9806\u5E8F\u3065\u3051\u3089\u308C\u3066\u3044\u306A\u3044\u96C6\u5408\u304B\u3089\u306A\u308B\u30C7\u30FC\u30BF\u69CB\u9020\u306E\u3053\u3068\u3067\u3042\u308B\u3002 \u5024\u3068\u3057\u3066\u306E\u95A2\u4FC2\u3092\u95A2\u4FC2\u5024 (relation value) \u3068\u3044\u3044\u3001\u95A2\u4FC2\u5024\u3092\u5024\u3068\u3057\u3066\u3082\u3064\u5909\u6570\u3092\u95A2\u4FC2\u5909\u6570 (relvar, relation variable) \u3068\u3044\u3046\u3002 \u95A2\u4FC2\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u306E\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u8A00\u8A9E\u3067\u3042\u308BSQL \u3067\u306F\u3001\u95A2\u4FC2\u5909\u6570\u3068\u307B\u307C\u540C\u3058\u610F\u5473\u3067\u8868 (\u30C6\u30FC\u30D6\u30EB) \u3068\u3044\u3046\u7528\u8A9E\u304C\u4F7F\u308F\u308C\u3066\u3044\u308B\u3002\u6587\u8108\u306B\u3088\u3063\u3066\u3001\u95A2\u4FC2\u5909\u6570\u3092\u95A2\u4FC2\u3068\u547C\u3076\u3053\u3068\u3082\u3042\u308A\u3001\u307E\u305F\u95A2\u4FC2\u5024\u3092\u95A2\u4FC2\u3068\u547C\u3076\u3053\u3068\u3082\u3042\u308B\u3002 \u305D\u306E\u4ED6\u3001\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u306B\u304A\u3051\u308B\u95A2\u4FC2\u306B\u306F\u4EE5\u4E0B\u306E\u3053\u3068\u304C\u8A00\u3048\u308B\u3002 \n* \u95A2\u4FC2\u5909\u6570\u304C\u5024\u3068\u3057\u3066\u3082\u3064\u95A2\u4FC2\u5024\u306F\u3001\u6642\u9593\u3068\u3068\u3082\u306B\u5909\u5316\u3059\u308B\u3002 \n* \u95A2\u4FC2\u5909\u6570\u306F\u30C7\u30FC\u30BF\u5B9A\u7FA9\u8A00\u8A9E (DDL) \u3092\u4F7F\u3063\u3066\u5B9A\u7FA9\u3059\u308B\u3053\u3068\u304C\u3067\u304D\u308B\u3002 \n* \u898B\u51FA\u3057 (heading) \u306F\u3001\u7279\u5B9A\u306E\u5C5E\u6027 (\u5217\u3001\u30AB\u30E9\u30E0) \u306E\u9806\u5E8F\u3065\u3051\u3089\u308C\u3066\u3044\u306A\u3044\u96C6\u5408\u3067\u3042\u308B\u3002 \n* \u95A2\u4FC2\u5024\u3092\u69CB\u6210\u3059\u308B\u7D44\u306E\u96C6\u5408\u3092\u672C\u4F53 (body) \u3068\u3044\u3046\u3002 \n* \u3059\u306A\u308F\u3061\u95A2\u4FC2\u5024\u306F\u3001\u898B\u51FA\u3057\u3068\u672C\u4F53\u304B\u3089\u69CB\u6210\u3055\u308C\u3066\u3044\u308B\u3002 \n* \u7D44\u306F\u30010\u4EE5\u4E0A\u306E\u5C5E\u6027\u306E\u96C6\u5408\u304B\u3089\u306A\u308B\u30C7\u30FC\u30BF\u69CB\u9020\u3067\u3042\u308B\u3002 \n* \u5C5E\u6027\u306F\u3001\u5C5E\u6027\u540D\u3068\u5B9A\u7FA9\u57DF\u306E\u540D\u79F0\u306E\u30DA\u30A2\u3067\u3042\u308B\u3002 \n* \u5B9A\u7FA9\u57DF\u306F\u3001\u30C7\u30FC\u30BF\u578B\u3068\u540C\u3058\u610F\u5473\u3068\u8003\u3048\u3066\u3088\u3044\u3002 \n* \u5C5E\u6027\u306F\u3001\u305D\u306E\u5B9A\u7FA9\u57DF\u306B\u9069\u5408\u3059\u308B\u306A\u3093\u3089\u304B\u306E\u5C5E\u6027\u5024\u3092\u3082\u3064\u3002 \n* \u5C5E\u6027\u5024\u306F\u3001\u30B9\u30AB\u30E9\u5024\u3082\u3057\u304F\u306F\u3088\u308A\u8907\u96D1\u306A\u69CB\u9020\u3092\u3082\u3064\u5024\u3067\u3042\u308B\u3002 \n* \u898B\u51FA\u3057\u3092\u69CB\u6210\u3059\u308B\u5C5E\u6027\u306E\u6570\u3092\u3001\u6B21\u6570 (degree) \u3068\u3044\u3046\u3002 \n* \u95A2\u4FC2\u5024\u306E\u6B21\u6570\u306F\u30010\u3082\u3057\u304F\u306F\u6B63\u306E\u6574\u6570\u3067\u3042\u308B\u3002 \n* \u6B21\u6570\u304C n \u3067\u3042\u308B\u95A2\u4FC2\u5024\u3092 n \u9805\u95A2\u4FC2 (n-ary relation) \u3068\u3044\u3046\u3002 \n* \u95A2\u4FC2\u5024\u3092\u69CB\u6210\u3059\u308B\u7D44\u306E\u6570\u3092\u6FC3\u5EA6 (cardinality) \u3068\u3044\u3046\u3002 \n* \u95A2\u4FC2\u5024\u306E\u6FC3\u5EA6\u306F\u30010\u3082\u3057\u304F\u306F\u6B63\u306E\u6574\u6570\u3067\u3042\u308B\u3002 \n* \u95A2\u4FC2\u5024\u3067\u306F\u3001\u91CD\u8907\u3059\u308B\u7D44\u306F\u5B58\u5728\u3057\u306A\u3044\u3002 \n* \u95A2\u4FC2\u5024\u3092\u69CB\u6210\u3059\u308B\u304A\u306E\u304A\u306E\u306E\u7D44\u306F\u7279\u5B9A\u306E\u4E00\u3064\u4EE5\u4E0A\u306E\u5C5E\u6027\u306E\u96C6\u5408\u3067\u8B58\u5225\u3055\u308C\u308B\u3002 \n* \u3053\u306E\u5C5E\u6027\u96C6\u5408\u3092\u5019\u88DC\u30AD\u30FC (candidate key) \u3068\u3044\u3046\u3002"@ja . . "\u041E\u0442\u043D\u043E\u0448\u0435\u043D\u0438\u0435 (\u0440\u0435\u043B\u044F\u0446\u0438\u043E\u043D\u043D\u0430\u044F \u043C\u043E\u0434\u0435\u043B\u044C)"@ru . . . . "\u0412\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F (\u0440\u0435\u043B\u044F\u0446\u0456\u0439\u043D\u0430 \u043C\u043E\u0434\u0435\u043B\u044C)"@uk . "23720058"^^ . . "Relation (Datenbank)"@de . . . . "In database theory, a relation, as originally defined by E. F. Codd, is a set of tuples (d1, d2, ..., dn), where each element dj is a member of Dj, a data domain. Codd's original definition notwithstanding, and contrary to the usual definition in mathematics, there is no ordering to the elements of the tuples of a relation. Instead, each element is termed an attribute value. An attribute is a name paired with a domain (nowadays more commonly referred to as a type or data type). An attribute value is an attribute name paired with an element of that attribute's domain, and a tuple is a set of attribute values in which no two distinct elements have the same name. Thus, in some accounts, a tuple is described as a function, mapping names to values. A set of attributes in which no two distinct elements have the same name is called a heading. It follows from the above definitions that to every tuple there corresponds a unique heading, being the set of names from the tuple, paired with the domains from which the tuple's domain elements are taken. A set of tuples that all correspond to the same heading is called a body. A relation is thus a heading paired with a body, the heading of the relation being also the heading of each tuple in its body. The number of attributes constituting a heading is called the degree, which term also applies to tuples and relations. The term n-tuple refers to a tuple of degree n (n \u2265 0). E. F. Codd used the term \"relation\" in its mathematical sense of a finitary relation, a set of tuples on some set of n sets S1, S2, .... ,Sn. Thus, an n-ary relation is interpreted, under the Closed-World Assumption, as the extension of some n-adic predicate: all and only those n-tuples whose values, substituted for corresponding free variables in the predicate, yield propositions that hold true, appear in the relation. The term relation schema refers to a heading paired with a set of constraints defined in terms of that heading. A relation can thus be seen as an instantiation of a relation schema if it has the heading of that schema and it satisfies the applicable constraints. Sometimes a relation schema is taken to include a name. A relational database definition (database schema, sometimes referred to as a relational schema) can thus be thought of as a collection of named relation schemas. In implementations, the domain of each attribute is effectively a data type and a named relation schema is effectively a relation variable (relvar for short). In SQL, a database language for relational databases, relations are represented by tables, where each row of a table represents a single tuple, and where the values of each attribute form a column."@en . . . . "\uAD00\uACC4 (\uB370\uC774\uD130\uBCA0\uC774\uC2A4)"@ko . . "\u5728\u5173\u7CFB\u6A21\u578B\u4E2D\uFF0C\u5173\u7CFB\u662F\u63CF\u8FF0\u73B0\u5B9E\u4E16\u754C\u7684\u5B9E\u4F53\u53CA\u5176\u4E4B\u95F4\u5404\u79CD\u8054\u7CFB\u7684\u5355\u4E00\u7684\u6570\u636E\u7ED3\u6784\u3002\u7531\u5173\u7CFB\u7684\u540D\u79F0\u548C\u4E00\u7EC4\u5177\u6709\u5171\u540C\u5C5E\u6027\u7684\u65E0\u5E8F\u7684\u591A\u5143\u7EC4\u6784\u6210\u3002\u5173\u7CFB\u53EF\u4EE5\u770B\u505A\u662F\u4E00\u4E2A\u7B1B\u5361\u5C14\u79EF\u7684\u6709\u9650\u5B50\u96C6\uFF0C\u7B1B\u5361\u5C14\u79EF\u4E2D\u7684\u5143\u7EC4\u5E76\u4E0D\u662F\u5168\u90FD\u6709\u610F\u4E49\uFF0C\u53EA\u6709\u6709\u610F\u4E49\u7684\u90A3\u4E9B\u624D\u80FD\u6210\u4E3A\u5173\u7CFB\u3002 \u4F8B\u5982\u7ED9\u5B9A\u4E24\u4E2A\u57DF\uFF1AX1 = {1\uFF0C2\uFF0C3}\u548CX2 = {\u4E00\uFF0C\u4E8C\uFF0C\u4E09}\u8FD9\u4E24\u4E2A\u57DF\u7684\u7B1B\u5361\u5C14\u79EF\u662F\u4E00\u4E2A\u75319\u4E2A\u4E8C\u5143\u7EC4\u7EC4\u6210\u7684\u96C6\u5408\uFF1AX1 \u00D7 X2 = {\uFF081\uFF0C\u4E00\uFF09\uFF0C\uFF081\uFF0C\u4E8C\uFF09\uFF0C\uFF081\uFF0C\u4E09\uFF09\uFF0C\uFF082\uFF0C\u4E00\uFF09\uFF0C\uFF082\uFF0C\u4E8C\uFF09\uFF0C\uFF082\uFF0C\u4E09\uFF09\uFF0C\uFF083\uFF0C\u4E00\uFF09\uFF0C\uFF083\uFF0C\u4E8C\uFF09\uFF0C\uFF083\uFF0C\u4E09\uFF09}\u4E5F\u53EF\u4EE5\u5217\u4E00\u5F20\u4E8C\u7EF4\u8868 \u5982\u679C\u5B9A\u4E49\u4E00\u4E2A\u963F\u62C9\u4F2F\u6570\u5B57\u4E0E\u5176\u5BF9\u5E94\u7684\u6C49\u5B57\u6570\u5B57\u5728\u4E00\u8D77\u624D\u6709\u610F\u4E49\uFF0C\u90A3\u4E48\u4E0A\u97629\u4E2A\u4E8C\u5143\u7EC4\u4E2D\u53EA\u67093\u4E2A\u662F\u6709\u610F\u4E49\u7684\uFF0C\u5C06\u8FD9\u79CD\u5173\u7CFB\u53D6\u540D\u4E3A\u201C\u6570\u5B57\u201D\uFF0C\u5219\u53EF\u5F97\uFF1A \u8FD9\u79CD\u5173\u7CFB\u4E5F\u53EF\u8868\u793A\u4E3A\uFF1A\u6570\u5B57\uFF08\u963F\u62C9\u4F2F\u6570\u5B57\uFF0C\u6C49\u5B57\u6570\u5B57\uFF09\u3002\u8FD9\u4E2A\u5173\u7CFB\u4E2D\u7684\u5019\u9009\u7801\u6709\u4E24\u4E2A\uFF1A\u963F\u62C9\u4F2F\u6570\u5B57\u548C\u6C49\u5B57\u6570\u5B57\uFF0C\u90FD\u53EF\u4EE5\u9009\u505A\u8FD9\u4E2A\u5173\u7CFB\u7684\u4E3B\u7801\u3002"@zh . . . . . . "\u95A2\u4FC2 (\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9)"@ja . . . "\u0412\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F \u2014 \u0444\u0443\u043D\u0434\u0430\u043C\u0435\u043D\u0442\u0430\u043B\u044C\u043D\u0435 \u043F\u043E\u043D\u044F\u0442\u0442\u044F \u0440\u0435\u043B\u044F\u0446\u0456\u0439\u043D\u043E\u0457 \u043C\u043E\u0434\u0435\u043B\u0456 \u0434\u0430\u043D\u0438\u0445. \u0417 \u0446\u0456\u0454\u0457 \u043F\u0440\u0438\u0447\u0438\u043D\u0438 \u043C\u043E\u0434\u0435\u043B\u044C \u0456 \u043D\u0430\u0437\u0438\u0432\u0430\u0454\u0442\u044C\u0441\u044F \u0440\u0435\u043B\u044F\u0446\u0456\u0439\u043D\u043E\u044E (\u0432\u0456\u0434 \u0430\u043D\u0433\u043B\u0456\u0439\u0441\u044C\u043A\u043E\u0433\u043E relation \u2014 \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F). \n* N-\u0430\u0440\u043D\u0438\u043C \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F\u043C R, \u0430\u0431\u043E \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F R \u0441\u0442\u0435\u043F\u0435\u043D\u044F n, \u043D\u0430\u0437\u0438\u0432\u0430\u044E\u0442\u044C \u043F\u0456\u0434\u043C\u043D\u043E\u0436\u0438\u043D\u0443 \u0434\u0435\u043A\u0430\u0440\u0442\u043E\u0432\u043E\u0433\u043E \u0434\u043E\u0431\u0443\u0442\u043A\u0443 \u043C\u043D\u043E\u0436\u0438\u043D , \u043D\u0435 \u043E\u0431\u043E\u0432'\u044F\u0437\u043A\u043E\u0432\u043E \u0440\u0456\u0437\u043D\u0438\u0445. \u0412\u0438\u0445\u0456\u0434\u043D\u0456 \u043C\u043D\u043E\u0436\u0438\u043D\u0438 \u043D\u0430\u0437\u0438\u0432\u0430\u044E\u0442\u044C \u0432 \u043C\u043E\u0434\u0435\u043B\u0456 \u0434\u043E\u043C\u0435\u043D\u0430\u043C\u0438 (\u0432 \u0421\u041A\u0411\u0414 \u0432\u0438\u043A\u043E\u0440\u0438\u0441\u0442\u043E\u0432\u0443\u0454\u0442\u044C\u0441\u044F \u043F\u043E\u043D\u044F\u0442\u0442\u044F \u0442\u0438\u043F \u0434\u0430\u043D\u0438\u0445). \u0422\u0430\u043A\u0430 \u0442\u0430\u0431\u043B\u0438\u0446\u044F \u043C\u0430\u0454 \u0440\u044F\u0434 \u0432\u043B\u0430\u0441\u0442\u0438\u0432\u043E\u0441\u0442\u0435\u0439: \u041F\u0456\u0434 \u0440\u043E\u0437\u0443\u043C\u0456\u0454\u043C\u043E \u0432\u0445\u043E\u0434\u0436\u0435\u043D\u043D\u044F \u0434\u043E\u043C\u0435\u043D\u0443 \u0443 \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F. \u0420\u044F\u0434\u043A\u0438 \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F \u043D\u0430\u0437\u0438\u0432\u0430\u044E\u0442\u044C\u0441\u044F \u043A\u043E\u0440\u0442\u0435\u0436\u0430\u043C\u0438."@uk . . "\u5173\u7CFB (\u6570\u636E\u5E93)"@zh . "In database theory, a relation, as originally defined by E. F. Codd, is a set of tuples (d1, d2, ..., dn), where each element dj is a member of Dj, a data domain. Codd's original definition notwithstanding, and contrary to the usual definition in mathematics, there is no ordering to the elements of the tuples of a relation. Instead, each element is termed an attribute value. An attribute is a name paired with a domain (nowadays more commonly referred to as a type or data type). An attribute value is an attribute name paired with an element of that attribute's domain, and a tuple is a set of attribute values in which no two distinct elements have the same name. Thus, in some accounts, a tuple is described as a function, mapping names to values."@en . . "1122444529"^^ . . . . "Relation (database)"@en . . . . "\u041E\u0442\u043D\u043E\u0448\u0435\u0301\u043D\u0438\u0435 \u2014 \u0444\u0443\u043D\u0434\u0430\u043C\u0435\u043D\u0442\u0430\u043B\u044C\u043D\u043E\u0435 \u043F\u043E\u043D\u044F\u0442\u0438\u0435 \u0440\u0435\u043B\u044F\u0446\u0438\u043E\u043D\u043D\u043E\u0439 \u043C\u043E\u0434\u0435\u043B\u0438 \u0434\u0430\u043D\u043D\u044B\u0445. \u041F\u043E \u044D\u0442\u043E\u0439 \u043F\u0440\u0438\u0447\u0438\u043D\u0435 \u043C\u043E\u0434\u0435\u043B\u044C \u0438 \u043D\u0430\u0437\u044B\u0432\u0430\u0435\u0442\u0441\u044F \u0440\u0435\u043B\u044F\u0446\u0438\u043E\u043D\u043D\u043E\u0439 (\u043E\u0442 \u0430\u043D\u0433\u043B. relation \u2014 \u00AB\u043E\u0442\u043D\u043E\u0448\u0435\u043D\u0438\u0435\u00BB)."@ru . "\u95A2\u4FC2\uFF08\u304B\u3093\u3051\u3044\u3001\u30EA\u30EC\u30FC\u30B7\u30E7\u30F3\u3001\u82F1: relation\uFF09\u3068\u306F\u95A2\u4FC2\u30E2\u30C7\u30EB\uFF08\u30EA\u30EC\u30FC\u30B7\u30E7\u30CA\u30EB\u30E2\u30C7\u30EB\uFF09\u306B\u304A\u3044\u3066\u3001\u4E00\u3064\u306E\u898B\u51FA\u3057\u30680\u4EE5\u4E0A\u306E\u540C\u3058\u578B\u306E\u7D44 (\u30BF\u30D7\u30EB\u3001\u884C) \u306E\u9806\u5E8F\u3065\u3051\u3089\u308C\u3066\u3044\u306A\u3044\u96C6\u5408\u304B\u3089\u306A\u308B\u30C7\u30FC\u30BF\u69CB\u9020\u306E\u3053\u3068\u3067\u3042\u308B\u3002 \u5024\u3068\u3057\u3066\u306E\u95A2\u4FC2\u3092\u95A2\u4FC2\u5024 (relation value) \u3068\u3044\u3044\u3001\u95A2\u4FC2\u5024\u3092\u5024\u3068\u3057\u3066\u3082\u3064\u5909\u6570\u3092\u95A2\u4FC2\u5909\u6570 (relvar, relation variable) \u3068\u3044\u3046\u3002 \u95A2\u4FC2\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u306E\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u8A00\u8A9E\u3067\u3042\u308BSQL \u3067\u306F\u3001\u95A2\u4FC2\u5909\u6570\u3068\u307B\u307C\u540C\u3058\u610F\u5473\u3067\u8868 (\u30C6\u30FC\u30D6\u30EB) \u3068\u3044\u3046\u7528\u8A9E\u304C\u4F7F\u308F\u308C\u3066\u3044\u308B\u3002\u6587\u8108\u306B\u3088\u3063\u3066\u3001\u95A2\u4FC2\u5909\u6570\u3092\u95A2\u4FC2\u3068\u547C\u3076\u3053\u3068\u3082\u3042\u308A\u3001\u307E\u305F\u95A2\u4FC2\u5024\u3092\u95A2\u4FC2\u3068\u547C\u3076\u3053\u3068\u3082\u3042\u308B\u3002 \u305D\u306E\u4ED6\u3001\u30C7\u30FC\u30BF\u30D9\u30FC\u30B9\u306B\u304A\u3051\u308B\u95A2\u4FC2\u306B\u306F\u4EE5\u4E0B\u306E\u3053\u3068\u304C\u8A00\u3048\u308B\u3002"@ja . "\uAD00\uACC4 \uBAA8\uB378\uC5D0\uC11C \uAD00\uACC4(relation)\uB294 \uB3D9\uC77C\uD55C \uAD6C\uC870\uB85C \uC774\uB8E8\uC5B4\uC9C4 \uD29C\uD50C\uC758 \uC9D1\uD569\uC744 \uB9D0\uD55C\uB2E4. \uAC12\uC73C\uB85C\uC11C\uC758 \uAD00\uACC4\uB97C \u2018\uAD00\uACC4\uAC12\u2019(relation value)\uB77C\uACE0 \uD558\uBA70, \uAD00\uACC4\uAC12\uC744 \uAC12\uC73C\uB85C \uAC00\uC9C0\uB294 \uBCC0\uC218\uB97C \u2018\u2019(relvar, relation variable)\uB77C\uACE0 \uD55C\uB2E4. \uC18D\uC131\uBA85\uACFC \uC5F0\uACB0\uB41C \uB3C4\uBA54\uC778(\uC5F4)\uB4E4\uC744 \uC815\uC758\uD55C \uAC83\uC740 \u2018\uAD00\uACC4 \uC2A4\uD0A4\uB9C8\u2019(relation schema)\uB77C\uACE0 \uBD88\uB9B0\uB2E4. \uB54C\uB85C\uB294 \uAD00\uACC4 \uC2A4\uD0A4\uB9C8\uB294 \uAD00\uACC4 \uADF8 \uC790\uCCB4\uC758 \uC774\uB984\uC5D0 \uD3EC\uD568\uB418\uAE30\uB3C4 \uD55C\uB2E4. \uC774\uB7EC\uD55C \uAD00\uACC4 \uC2A4\uD0A4\uB9C8\uB294 \u2018\uD14C\uC774\uBE14 \uC2A4\uD0A4\uB9C8\u2019(table schema)\uB85C\uB3C4 \uBD88\uB9AC\uAE30\uB3C4 \uD55C\uB2E4. \uAD00\uACC4 \uB370\uC774\uD130\uBCA0\uC774\uC2A4\uC758 \uB370\uC774\uD130\uBCA0\uC774\uC2A4 \uC5B8\uC5B4\uC778 SQL\uC5D0\uC11C\uB294 \uAD00\uACC4 \uBCC0\uC218\uC640 \uAC70\uC758 \uAC19\uC740 \uC758\uBBF8\uB85C \uD14C\uC774\uBE14\uC774\uB77C\uB294 \uC6A9\uC5B4\uAC00 \uC0AC\uC6A9\uB418\uACE0 \uC788\uB2E4. \uBB38\uB9E5\uC5D0 \uB530\uB77C\uC11C \u2018\uAD00\uACC4\uBCC0\uC218\u2019\uB97C \u2018\uAD00\uACC4\u2019\uB77C\uACE0 \uBD80\uB974\uAE30\uB3C4 \uD558\uACE0 \u2018\uAD00\uACC4\uAC12\u2019\uC744 \uAD00\uACC4\uB77C\uACE0 \uBD80\uB974\uAE30\uB3C4 \uD55C\uB2E4. \uAE30\uD0C0 \uB370\uC774\uD130\uBCA0\uC774\uC2A4\uC758 \uAD00\uACC4\uB294 \uB2E4\uC74C\uACFC \uAC19\uC740 \uAC83\uC744 \uB9D0\uD560 \uC218 \uC788\uB2E4."@ko . . "10378"^^ . . "\u0412\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F \u2014 \u0444\u0443\u043D\u0434\u0430\u043C\u0435\u043D\u0442\u0430\u043B\u044C\u043D\u0435 \u043F\u043E\u043D\u044F\u0442\u0442\u044F \u0440\u0435\u043B\u044F\u0446\u0456\u0439\u043D\u043E\u0457 \u043C\u043E\u0434\u0435\u043B\u0456 \u0434\u0430\u043D\u0438\u0445. \u0417 \u0446\u0456\u0454\u0457 \u043F\u0440\u0438\u0447\u0438\u043D\u0438 \u043C\u043E\u0434\u0435\u043B\u044C \u0456 \u043D\u0430\u0437\u0438\u0432\u0430\u0454\u0442\u044C\u0441\u044F \u0440\u0435\u043B\u044F\u0446\u0456\u0439\u043D\u043E\u044E (\u0432\u0456\u0434 \u0430\u043D\u0433\u043B\u0456\u0439\u0441\u044C\u043A\u043E\u0433\u043E relation \u2014 \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F). \n* N-\u0430\u0440\u043D\u0438\u043C \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F\u043C R, \u0430\u0431\u043E \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F R \u0441\u0442\u0435\u043F\u0435\u043D\u044F n, \u043D\u0430\u0437\u0438\u0432\u0430\u044E\u0442\u044C \u043F\u0456\u0434\u043C\u043D\u043E\u0436\u0438\u043D\u0443 \u0434\u0435\u043A\u0430\u0440\u0442\u043E\u0432\u043E\u0433\u043E \u0434\u043E\u0431\u0443\u0442\u043A\u0443 \u043C\u043D\u043E\u0436\u0438\u043D , \u043D\u0435 \u043E\u0431\u043E\u0432'\u044F\u0437\u043A\u043E\u0432\u043E \u0440\u0456\u0437\u043D\u0438\u0445. \u0412\u0438\u0445\u0456\u0434\u043D\u0456 \u043C\u043D\u043E\u0436\u0438\u043D\u0438 \u043D\u0430\u0437\u0438\u0432\u0430\u044E\u0442\u044C \u0432 \u043C\u043E\u0434\u0435\u043B\u0456 \u0434\u043E\u043C\u0435\u043D\u0430\u043C\u0438 (\u0432 \u0421\u041A\u0411\u0414 \u0432\u0438\u043A\u043E\u0440\u0438\u0441\u0442\u043E\u0432\u0443\u0454\u0442\u044C\u0441\u044F \u043F\u043E\u043D\u044F\u0442\u0442\u044F \u0442\u0438\u043F \u0434\u0430\u043D\u0438\u0445). \u0412\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F \u043C\u0430\u0454 \u043F\u0440\u043E\u0441\u0442\u0443 \u0433\u0440\u0430\u0444\u0456\u0447\u043D\u0443 \u0456\u043D\u0442\u0435\u0440\u043F\u0440\u0435\u0442\u0430\u0446\u0456\u044E, \u0432\u043E\u043D\u043E \u043C\u043E\u0436\u0435 \u0431\u0443\u0434\u0435 \u043F\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043B\u0435\u043D\u0435 \u0443 \u0432\u0438\u0433\u043B\u044F\u0434\u0456 \u0442\u0430\u0431\u043B\u0438\u0446\u0456, \u0441\u0442\u043E\u0432\u043F\u0446\u0456 (\u043F\u043E\u043B\u044F, \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u0438) \u044F\u043A\u043E\u0457 \u0432\u0456\u0434\u043F\u043E\u0432\u0456\u0434\u0430\u044E\u0442\u044C \u0432\u0445\u043E\u0434\u0436\u0435\u043D\u043D\u044F\u043C \u0434\u043E\u043C\u0435\u043D\u0456\u0432 \u0443 \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F, \u0430 \u0440\u044F\u0434\u043A\u0438 (\u0437\u0430\u043F\u0438\u0441\u0438, \u043A\u043E\u0440\u0442\u0435\u0436\u0456) \u2014 \u043D\u0430\u0431\u043E\u0440\u0430\u043C \u0437 n \u0437\u043D\u0430\u0447\u0435\u043D\u044C, \u0449\u043E 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\u043D\u0435\u0432\u043F\u043E\u0440\u044F\u0434\u043A\u043E\u0432\u0430\u043D\u0430 \u043C\u043D\u043E\u0436\u0438\u043D\u0430 \u0440\u0456\u0437\u043D\u0438\u0445 \u043A\u043E\u0440\u0442\u0435\u0436\u0456\u0432 tr. \n* \u0417\u043D\u0430\u0447\u0435\u043D\u043D\u044F\u043C Vr \u0432\u0456\u0434\u043D\u043E\u0448\u0435\u043D\u043D\u044F r \u043D\u0430\u0437\u0438\u0432\u0430\u0454\u0442\u044C\u0441\u044F \u043F\u0430\u0440\u0430 \u043C\u043D\u043E\u0436\u0438\u043D Hr \u0456 Br."@uk . "Formale Grundlage der Relation im Sinne einer Datenbankrelation ist die mathematische Definition und bildet die Basis der relationalen Algebra, die von Edgar F. Codd entwickelt wurde. Eine Relation besteht aus Tupeln, Tupeln wiederum werden durch Attribute beschrieben, welche den Typ (m\u00F6glichen Attributwerte) festlegt und mit einem Attributnamen beschreibt. Im Datenbankbereich unterscheiden sich die Begriffe Relation (Engl. relation) und Beziehung (Engl. relationship); diese begriffliche Trennung wird nicht immer genau gehandhabt."@de .