{"id":12638,"date":"2021-11-07T14:10:21","date_gmt":"2021-11-07T12:10:21","guid":{"rendered":"https:\/\/elmp.gr\/?post_type=sansimera&#038;p=12638"},"modified":"2021-11-07T14:10:21","modified_gmt":"2021-11-07T12:10:21","slug":"gennithike-o-edgar-codd-ethese-to-theoritiko-themelio-gia-tis-schesiakes-vaseis-dedomenon-rdbms","status":"publish","type":"sansimera","link":"https:\/\/elmp.gr\/en\/sansimera\/gennithike-o-edgar-codd-ethese-to-theoritiko-themelio-gia-tis-schesiakes-vaseis-dedomenon-rdbms\/","title":{"rendered":"\u0393\u03b5\u03bd\u03bd\u03ae\u03b8\u03b7\u03ba\u03b5 \u03bf Edgar Codd, \u03ad\u03b8\u03b5\u03c3\u03b5 \u03c4\u03bf \u03b8\u03b5\u03c9\u03c1\u03b7\u03c4\u03b9\u03ba\u03cc \u00ab\u03b8\u03b5\u03bc\u03ad\u03bb\u03b9\u03bf\u00bb \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03c3\u03c7\u03b5\u03c3\u03b9\u03b1\u03ba\u03ad\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (RDBMS)"},"content":{"rendered":"<p>\u03a3\u03c4\u03b7\u03bd \u03c6\u03c9\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03af\u03b1 \u03bf \u03ac\u03bd\u03b8\u03c1\u03c9\u03c0\u03bf\u03c2 \u03c0\u03bf\u03c5 \u00ab\u03ac\u03bb\u03bb\u03b1\u03be\u03b5\u00bb \u03c4\u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03bc\u03b1\u03c2 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd! \u039a\u03b1\u03b9 \u03bf\u03b9 \u03c3\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03bf\u03af \u03ba\u03bf\u03bb\u03bf\u03c3\u03c3\u03bf\u03af \u03c4\u03bf\u03c5 \u03c4\u03bf\u03bc\u03ad\u03b1 \u03b2\u03b1\u03c3\u03af\u03c3\u03c4\u03b7\u03ba\u03b1\u03bd \u03c3\u03c4\u03b9\u03c2 \u03b8\u03b5\u03c9\u03c1\u03af\u03b5\u03c2 \u03c4\u03bf\u03c5.<\/p>\n<p>\u039f Edgar Codd \u03b3\u03bd\u03c9\u03c3\u03c4\u03cc\u03c2 \u03c9\u03c2 Ted, \u03ae\u03c4\u03b1\u03bd \u03bc\u03b1\u03b8\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03cc\u03c2 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ce\u03bd \u03c0\u03bf\u03c5 \u03ad\u03b8\u03b5\u03c3\u03b5 \u03c4\u03bf \u03b8\u03b5\u03c9\u03c1\u03b7\u03c4\u03b9\u03ba\u03cc \u03b8\u03b5\u03bc\u03ad\u03bb\u03b9\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03c3\u03c7\u03b5\u03c3\u03b9\u03b1\u03ba\u03ad\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (RDBMS), \u03c4\u03b7\u03bd \u03c4\u03c5\u03c0\u03b9\u03ba\u03ae \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03bf\u03b9 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03bf\u03c1\u03b3\u03b1\u03bd\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03b1\u03ba\u03c4\u03ce\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ad\u03c2. \u0397 \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf\u03c2 \u03b1\u03c5\u03c4\u03ae \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03ad\u03c9\u03c2 \u03c4\u03b9\u03c2 \u03b7\u03bc\u03ad\u03c1\u03b5\u03c2 \u03bc\u03b1\u03c2.<\/p>\n<p>\u03a4\u03bf 1970, \u03bf Edgar Codd -\u03b5\u03bd\u03ce \u03b5\u03c1\u03b3\u03b1\u03b6\u03cc\u03c4\u03b1\u03bd \u03c3\u03c4\u03b7\u03bd IBM- \u03b4\u03b7\u03bc\u03bf\u03c3\u03af\u03b5\u03c5\u03c3\u03b5 \u03ad\u03bd\u03b1 \u03ad\u03b3\u03b3\u03c1\u03b1\u03c6\u03bf \u03bc\u03b5 \u03c4\u03af\u03c4\u03bb\u03bf \u00abA Relational Model of Data for Large Shared Data Banks\u00bb \u03c3\u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03c0\u03b5\u03c1\u03b9\u03ad\u03b3\u03c1\u03b1\u03c6\u03b5 \u03c0\u03ce\u03c2 \u03bf\u03b9 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03c5\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c3\u03c4\u03b9\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b5\u03b3\u03b3\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03c7\u03c9\u03c1\u03af\u03c2 \u03bd\u03b1 \u00ab\u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03b3\u03bd\u03ce\u03c3\u03b7\u00bb \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c0\u03ce\u03c2 \u03b4\u03bf\u03bc\u03ae\u03b8\u03b7\u03ba\u03b1\u03bd \u03bf\u03b9 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03ae \u03c0\u03bf\u03cd \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03bd \u03c3\u03c4\u03b7 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd. \u039f Codd \u03c3\u03c5\u03bd\u03ad\u03c7\u03b9\u03c3\u03b5 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03c0\u03c4\u03cd\u03c3\u03c3\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b8\u03b5\u03c9\u03c1\u03af\u03b5\u03c2 \u03c4\u03bf\u03c5, \u03cc\u03bc\u03c9\u03c2 \u03b5\u03ba\u03b5\u03af\u03bd\u03b7 \u03c4\u03b7\u03bd \u03b5\u03c0\u03bf\u03c7\u03ae \u03b7 IBM -\u03b5\u03c4\u03b1\u03b9\u03c1\u03b5\u03af\u03b1 \u03c0\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03b6\u03cc\u03c4\u03b1\u03bd- \u03b4\u03b5\u03bd \u00ab\u03ad\u03b4\u03b5\u03b9\u03c7\u03bd\u03b5\u00bb \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c5\u03b9\u03bf\u03b8\u03b5\u03c4\u03ae\u03c3\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b9\u03b4\u03ad\u03b5\u03c2 \u03c4\u03bf\u03c5. \u039a\u03b1\u03b8\u03ce\u03c2 \u03c4\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c9\u03bd \u03c3\u03c7\u03b5\u03c3\u03b9\u03b1\u03ba\u03ce\u03bd \u03b2\u03ac\u03c3\u03b5\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ad\u03b3\u03b9\u03bd\u03b1\u03bd \u03b4\u03b7\u03bc\u03bf\u03c6\u03b9\u03bb\u03ae \u03c3\u03c4\u03b9\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 1980, \u03bf Codd \u03b4\u03ae\u03bb\u03c9\u03bd\u03b5 \u03b1\u03c0\u03bf\u03b3\u03bf\u03b7\u03c4\u03b5\u03c5\u03bc\u03ad\u03bd\u03bf\u03c2 \u03b5\u03c0\u03b5\u03b9\u03b4\u03ae \u03bf\u03b9 \u03b9\u03b4\u03ad\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03b5\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03cc\u03c3\u03c4\u03b7\u03ba\u03b5 \u03c3\u03c9\u03c3\u03c4\u03ac.<\/p>\n<p>\u03a4\u03bf 1985 \u03b4\u03b7\u03bc\u03bf\u03c3\u03af\u03b5\u03c5\u03c3\u03b5 \u03c4\u03bf\u03c5\u03c2 \u00ab12 \u03ba\u03b1\u03bd\u03cc\u03bd\u03b5\u03c2 \u03c4\u03bf\u03c5 Codd\u00bb \u03c0\u03bf\u03c5 \u03ba\u03b1\u03b8\u03cc\u03c1\u03b9\u03b6\u03b1\u03bd \u03c4\u03b1 \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03ac \u03c4\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b9\u03b4\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03b1 \u03ad\u03c0\u03c1\u03b5\u03c0\u03b5 \u03bd\u03b1 \u03b5\u03af\u03c7\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03b2\u03ac\u03c3\u03b5\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b8\u03b5\u03c9\u03c1\u03b7\u03b8\u03b5\u03af \u00ab\u03c3\u03c7\u03b5\u03c3\u03b9\u03b1\u03ba\u03cc\u00bb.<\/p>\n<p>\u039f Edgar Codd \u03b3\u03b5\u03bd\u03bd\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03b9\u03c2 19.08.1923, \u03c3\u03c4\u03bf \u03c7\u03c9\u03c1\u03af\u03bf Fortuneswell, \u03c3\u03c4\u03bf \u03bc\u03b9\u03ba\u03c1\u03cc \u03bd\u03b7\u03c3\u03ac\u03ba\u03b9 Isle of Portland \u03c3\u03c4\u03bf Dorset \u03c4\u03b7\u03c2 \u0391\u03b3\u03b3\u03bb\u03af\u03b1\u03c2. \u039f Codd \u03c3\u03c0\u03bf\u03cd\u03b4\u03b1\u03c3\u03b5 \u03bc\u03b1\u03b8\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03c7\u03b7\u03bc\u03b5\u03af\u03b1 \u03c3\u03c4\u03bf Exeter College \u03c4\u03b7\u03c2 \u039f\u03be\u03c6\u03cc\u03c1\u03b4\u03b7\u03c2, \u03c0\u03c1\u03b9\u03bd \u03c5\u03c0\u03b7\u03c1\u03b5\u03c4\u03ae\u03c3\u03b5\u03b9 \u03c9\u03c2 \u03c0\u03b9\u03bb\u03cc\u03c4\u03bf\u03c2 \u03c3\u03c4\u03b7\u03bd RAF \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u0394\u03b5\u03cd\u03c4\u03b5\u03c1\u03bf\u03c5 \u03a0\u03b1\u03b3\u03ba\u03bf\u03c3\u03bc\u03af\u03bf\u03c5 \u03a0\u03bf\u03bb\u03ad\u03bc\u03bf\u03c5.<\/p>\n<p>\u03a4\u03bf 1948, \u03bc\u03b5\u03c4\u03b1\u03ba\u03cc\u03bc\u03b9\u03c3\u03b5 \u03c3\u03c4\u03b7 \u039d\u03ad\u03b1 \u03a5\u03cc\u03c1\u03ba\u03b7 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03b5\u03af \u03c3\u03c4\u03b7\u03bd IBM \u03c9\u03c2 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c2.<\/p>\n<p>\u03a4\u03bf 1953, \u03bf Codd \u03bc\u03b5\u03c4\u03b1\u03ba\u03cc\u03bc\u03b9\u03c3\u03b5 \u03c3\u03c4\u03b7\u03bd \u039f\u03c4\u03ac\u03b2\u03b1 \u03c4\u03bf\u03c5 \u039a\u03b1\u03bd\u03b1\u03b4\u03ac \u03ba\u03b1\u03b9 \u03c4\u03bf 1957 \u03b5\u03c0\u03ad\u03c3\u03c4\u03c1\u03b5\u03c8\u03b5 \u03c3\u03c4\u03b9\u03c2 \u0397.\u03a0.\u0391. \u03ba\u03b1\u03b9 \u03be\u03b5\u03ba\u03af\u03bd\u03b7\u03c3\u03b5 \u03bd\u03b1 \u03b5\u03c1\u03b3\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b5\u03ba \u03bd\u03ad\u03bf\u03c5 \u03c3\u03c4\u03b7\u03bd IBM. \u03a4\u03bf 1965 \u03ad\u03bb\u03b1\u03b2\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b4\u03b1\u03ba\u03c4\u03bf\u03c1\u03b9\u03ba\u03cc \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c3\u03c4\u03ae\u03bc\u03b7 \u03c4\u03c9\u03bd \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ce\u03bd \u03c3\u03c4\u03bf \u03a0\u03b1\u03bd\u03b5\u03c0\u03b9\u03c3\u03c4\u03ae\u03bc\u03b9\u03bf \u03c4\u03bf\u03c5 Michigan. \u0394\u03cd\u03bf \u03c7\u03c1\u03cc\u03bd\u03b9\u03b1 \u03b1\u03c1\u03b3\u03cc\u03c4\u03b5\u03c1\u03b1 \u03bc\u03b5\u03c4\u03b1\u03ba\u03cc\u03bc\u03b9\u03c3\u03b5 \u03c3\u03c4\u03bf San Jose \u03c4\u03b7\u03c2 \u039a\u03b1\u03bb\u03b9\u03c6\u03cc\u03c1\u03bd\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03c1\u03b3\u03ac\u03c3\u03c4\u03b7\u03ba\u03b5\u00a0 \u03c3\u03c4\u03bf \u0395\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u0395\u03c1\u03b5\u03c5\u03bd\u03ce\u03bd \u03c4\u03b7\u03c2 IBM, \u03bc\u03ad\u03c7\u03c1\u03b9 \u03c4\u03b7 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1 \u03c4\u03bf\u03c5 1980.<\/p>\n<p>\u03a4\u03bf 1981 \u03bf Codd \u03ad\u03bb\u03b1\u03b2\u03b5 \u03c4\u03bf \u03b2\u03c1\u03b1\u03b2\u03b5\u03af\u03bf Turing \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c3\u03c5\u03bd\u03b5\u03b9\u03c3\u03c6\u03bf\u03c1\u03ac \u03c3\u03c4\u03b7\u03bd \u03a0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03ba\u03ae.<\/p>\n<p>\u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1 \u03c4\u03bf\u03c5 1990, \u03b7 \u03c5\u03b3\u03b5\u03af\u03b1 \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03b4\u03b5\u03b9\u03bd\u03ce\u03b8\u03b7\u03ba\u03b5 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1\u03bc\u03ac\u03c4\u03b7\u03c3\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5. \u039f Codd \u03b1\u03c0\u03b5\u03b2\u03af\u03c9\u03c3\u03b5 \u03c4\u03bf 2003 \u03b1\u03c6\u03ae\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c0\u03af\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03c3\u03c0\u03bf\u03c5\u03b4\u03b1\u03af\u03bf \u03ad\u03c1\u03b3\u03bf.<\/p>\n<p>&nbsp;<\/p>\n<p>#recall_memory #hellenicITmuseum #elmp #museum #technologymuseum #todayintechhistory #database #rdbms #EdgarCodd<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.theregister.com\/2013\/08\/19\/ted_codd_90_relational_daddy\/?page=2\" target=\"_blank\" rel=\"noopener\">\u03a0\u03b7\u03b3\u03ae \u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5<\/a><\/p>\n<p><a href=\"https:\/\/www.theregister.com\/2013\/08\/19\/ted_codd_90_relational_daddy\/?page=2\" target=\"_blank\" rel=\"noopener\">\u03a0\u03b7\u03b3\u03ae \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1\u03c2<\/a><\/p>","protected":false},"featured_media":12758,"menu_order":400,"comment_status":"open","ping_status":"closed","template":"","class_list":["post-12638","sansimera","type-sansimera","status-publish","has-post-thumbnail","hentry","sansimeracategory-august"],"acf":[],"sansimeracategory":"\u0391\u03cd\u03b3\u03bf\u03c5\u03c3\u03c4\u03bf\u03c2","sansimeradate":"08\/19\/1923","sansimerayear":"1923","_links":{"self":[{"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/sansimera\/12638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/sansimera"}],"about":[{"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/types\/sansimera"}],"replies":[{"embeddable":true,"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/comments?post=12638"}],"version-history":[{"count":0,"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/sansimera\/12638\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/media\/12758"}],"wp:attachment":[{"href":"https:\/\/elmp.gr\/en\/wp-json\/wp\/v2\/media?parent=12638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}