[1] \u5897\u6c38 \u826f\u6587, \u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5165\u9580\u2015\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u30fbSQL\u30fb\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u30fbNoSQL (Information & Computing)\u30b5\u30a4\u30a8\u30f3\u30b9\u793e, 2017<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u6700\u8fd1\u3001RDMBS\u306e\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u8208\u5473\u304c\u3042\u308a\u3001\u4ee3\u8868\u7684\u306aPostgreSQL\u30fbMySQL\u306e\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u8abf\u67fb\u3092\u3057\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u3068\u304f\u306b\u8208\u5473\u304c\u3042\u3063\u305f\u554f\u3044\u5408\u308f\u305b(Query)\u3068\u305d\u306e\u5fdc\u7b54\u306e\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u3064\u3044\u3066\u6574\u7406\u3057\u3066\u307f\u307e\u3059\u3002 \u53d6\u3063\u639b\u308a\u3068\u306a\u308b\u8abf\u67fb\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u4ed5\u69d8\u304b\u3089\u3001PostgreSQL\u30fbMySQL\u305d\u308c\u305e\u308c\u306e\u8a2d\u8a08\u601d\u60f3\u7684\u306a\u3068\u3053\u308d\u3082\u57a3\u9593\u898b\u308c\u3001\u8208\u5473\u6df1\u3044\u8abf\u67fb\u3068\u306a\u308a\u307e\u3057\u305f\u3002\u7aef\u7684\u306b\u8a00\u3048\u3070\u3001PostgreSQL\u306f\u9ad8\u901f\u304b\u3064\u5408\u6210\u7684\u3067\u5408\u7406\u7684\u3001\u5bfe\u3059\u308bMySQL\u306e\u4ed5\u69d8\u306f\u53b3\u5bc6\u3067\u5197\u9577\u7684\u306a\u8a2d\u8a08\u306e\u5370\u8c61\u3092\u6301\u3061\u307e\u3057\u305f\u3002 RDBMS\u306e\u8cea\u554f(Query)\u64cd\u4f5c\u3068\u306f RDBMS\u3078\u5bfe\u3059\u308b\u64cd\u4f5c\u306f\u3001\u8cea\u554f(query)\u3068\u66f4\u65b0(update)\u306b\u5927\u5225\u3055\u308c\u307e\u3059\u3002RDBMS\u306e\u57fa\u790e\u3068\u306a\u308b\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u4ee3\u6570\u306f\u3001\u524d\u8005\u306e\u8cea\u554f\u64cd\u4f5c\u3092\u5bfe\u8c61\u3068\u3059\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u633f\u5165(insert)\u3084\u524a\u9664(delete)\u306a\u3069\u306f\u5f8c\u8005\u306e\u66f4\u65b0\u51e6\u7406\u306b\u542b\u307e\u308c\u307e\u3059[1]\u3002 \u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u4ee3\u6570\u306e\u8cea\u554f\u306f\u518d\u5e30\u6027(recursiveness)\u304c\u3042\u308a\u3001\u305d\u306e\u7d50\u679c\u306f\u518d\u3073\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u3068\u3057\u3066\u8868\u73fe\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u7d50\u679c\u3092\u8868\u3059\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u4ee3\u6570\u3067\u306f\u7d50\u679c\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3(result relation)\u3001SQL\u3067\u306f\u5c0e\u51fa\u8868(derived table)\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059[1]\u3002 \u3059\u306a\u308f\u3061\u3001\u8cea\u554f(query)\u64cd\u4f5c\u306b\u3064\u3044\u3066\u306f\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u4ee3\u6570\u306e\u7d50\u679c\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u76f8\u5f53\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb PostgreSQL\u30fbMySQL\u3068\u3082\u306b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u57fa\u672c\u3068\u306a\u308b\u901a\u4fe1\u30d1\u30b1\u30c3\u30c8\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u304a\u308a\u3001\u901a\u4fe1\u30d1\u30b1\u30c3\u30c8\u306b\u542b\u307e\u308c\u308b\u30c7\u30fc\u30bf\u306b\u3064\u3044\u3066\u3082\u57fa\u672c\u3068\u306a\u308b\u30c7\u30fc\u30bf\u578b\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u901a\u4fe1\u30d1\u30b1\u30c3\u30c8 \u901a\u4fe1\u30d1\u30b1\u30c3\u30c8\u306f\u3001PostgreSQL\u30fbMySQL\u3068\u3082\u306b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u57fa\u672c\u3068\u306a\u308b\u30d1\u30b1\u30c3\u30c8\u5f62\u5f0f\u3067\u3001\u5168\u3066\u306e\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u3053\u306e\u30d1\u30b1\u30c3\u30c8\u4ed5\u69d8\u306b\u6e96\u3058\u3066\u3044\u307e\u3059\u3002 PostgreSQL\u30fbMySQL\u3068\u3082\u306b\u901a\u4fe1\u30d1\u30b1\u30c3\u30c8\u306e\u30b5\u30a4\u30ba\u3092\u793a\u3059\u30e1\u30c3\u30bb\u30fc\u30b8(\u30da\u30a4\u30ed\u30fc\u30c9)\u9577\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8868\u306b\u793a\u3059\u901a\u308a\u3001\u76f8\u9055\u70b9\u3068\u3057\u3066\u306f\u3001PostgreSQL\u304c\u30e1\u30c3\u30bb\u30fc\u30b8\u7a2e\u5225\u304b\u3089\u30d1\u30b1\u30c3\u30c8\u304c\u958b\u59cb\u3055\u308c\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001MySQL\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u7a2e\u5225\u306f\u30da\u30a4\u30ed\u30fc\u30c9\u90e8\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002 \u9805\u76ee PostgreSQL MySQL \u30e1\u30c3\u30bb\u30fc\u30b8\u7a2e\u5225 byte\\<1> – \u30da\u30a4\u30ed\u30fc\u30c9\u9577 int\\<4> int\\<3> \u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7 – int\\<1> \u30da\u30a4\u30ed\u30fc\u30c9 string\\<var> or binary string… 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