{"id":3447,"date":"2011-06-21T15:51:01","date_gmt":"2011-06-21T13:51:01","guid":{"rendered":"http:\/\/dev.ds.unipi.gr\/msc1\/?p=3447"},"modified":"2016-02-26T14:16:00","modified_gmt":"2016-02-26T12:16:00","slug":"data-management-and-business-intelligence","status":"publish","type":"post","link":"https:\/\/masters.ds.unipi.gr\/elearning\/data-management-and-business-intelligence\/","title":{"rendered":"\u0394\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u0395\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae \u039d\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7"},"content":{"rendered":"<h3>\u03a3\u03c4\u03cc\u03c7\u03bf\u03c2<\/h3>\n<p style=\"text-align: justify;\">\u039a\u03cd\u03c1\u03b9\u03bf\u03c2 \u03c3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 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\u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b5\u03be\u03b1\u03b3\u03c9\u03b3\u03ae\u03c2 \u03c7\u03c1\u03ae\u03c3\u03b9\u03bc\u03b7\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1\u03c2 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03ac.<\/p>\n<h3>\u03a0\u03b5\u03c1\u03b9\u03b5\u03c7\u03cc\u03bc\u03b5\u03bd\u03b1<\/h3>\n<ul>\n<li><strong>\u039a\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b7 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd:<\/strong> \u0392\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b5\u03c2, \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1, \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2, \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03c3\u03b5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1, \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bf\u03bc\u03cc\u03c4\u03b9\u03bc\u03c9\u03bd \u03ba\u03cc\u03bc\u03b2\u03c9\u03bd, \u03b1\u03b4\u03cc\u03bc\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03bf\u03bc\u03b7\u03bc\u03ad\u03bd\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 \u03bf\u03bc\u03cc\u03c4\u03b9\u03bc\u03c9\u03bd \u03ba\u03cc\u03bc\u03b2\u03c9\u03bd.<\/li>\n<li><strong> \u03a0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd:<\/strong> \u0392\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03b5\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c2 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03cc\u03c2 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd, \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03c4\u03bf \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03bd\u03ad\u03c6\u03bf\u03c2, \u03c4\u03bf \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf MapReduce, \u03b7 \u03c5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 Hadoop, \u03c4\u03bf HDFS.<\/li>\n<li><strong> \u0395\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b2\u03b5\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7:<\/strong> \u0395\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03c4\u03ac\u03c4\u03b1\u03be\u03b7\u03c2 (top-k), \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03c4\u03ac\u03c4\u03b1\u03be\u03b7\u03c2 \u03bc\u03b5 \u03c3\u03cd\u03b6\u03b5\u03c5\u03be\u03b7 (top-k join), \u03b1\u03bb\u03b3\u03cc\u03c1\u03b9\u03b8\u03bc\u03bf\u03b9 \u03b3\u03b9\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03c4\u03ac\u03c4\u03b1\u03be\u03b7\u03c2 \u03bc\u03b5 \u03c3\u03cd\u03b6\u03b5\u03c5\u03be\u03b7, \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03bf\u03c1\u03c5\u03c6\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03ae\u03c2 (skyline), \u03b1\u03bb\u03b3\u03cc\u03c1\u03b9\u03b8\u03bc\u03bf\u03b9 \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03bf\u03c1\u03c5\u03c6\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03ae\u03c2.<\/li>\n<li><strong> \u039c\u03b5\u03af\u03c9\u03c3\u03b7 \u03b4\u03b9\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u2013 \u0395\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03a7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd:<\/strong> \u03a0\u03bf\u03bb\u03c5\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1, \u03bc\u03bf\u03bd\u03c4\u03b5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7, \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c7\u03ce\u03c1\u03c9\u03bd \u03c0\u03bf\u03bb\u03bb\u03ce\u03bd \u03b4\u03b9\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd (\u03b7 \u00ab\u03ba\u03b1\u03c4\u03ac\u03c1\u03b1 \u03c4\u03c9\u03bd \u03c0\u03bf\u03bb\u03bb\u03ce\u03bd \u03b4\u03b9\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd\u00bb, \u03c4\u03bf \u00ab\u03c6\u03b1\u03b9\u03bd\u03cc\u03bc\u03b5\u03bd\u03bf \u03ba\u03b5\u03bd\u03bf\u03cd \u03c7\u03ce\u03c1\u03bf\u03c5\u00bb), \u03b1\u03bd\u03b5\u03c0\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03b5\u03c5\u03c1\u03b5\u03c4\u03b7\u03c1\u03af\u03c9\u03bd, \u03b1\u03bb\u03b3\u03cc\u03c1\u03b9\u03b8\u03bc\u03bf\u03b9 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 \u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2, \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03c3\u03b5 \u03c0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ac \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/li>\n<li><strong> \u0398\u03ad\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b9\u03b4\u03b9\u03c9\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2:<\/strong> \u0395\u03be\u03bf\u03c5\u03c3\u03b9\u03bf\u03b4\u03bf\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2, \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf\u03b9 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2, \u03c0\u03bf\u03bb\u03b9\u03c4\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03c3\u03bc\u03bf\u03af \u03b5\u03be\u03bf\u03c5\u03c3\u03b9\u03bf\u03b4\u03bf\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd, \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf\u03b9 \u03c0\u03c1\u03bf\u03c3\u03b2\u03ac\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5 \u03b2\u03ac\u03c3\u03b7 \u03c4\u03bf\u03c5\u03c2 \u03c1\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03c9\u03bd \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd (\u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf RBAC), \u03c4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1 \u03b4\u03b7\u03bc\u03bf\u03c3\u03b9\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7\u03c2 \u03b1\u03bd\u03ce\u03bd\u03c5\u03bc\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, k-anonymity, l-diversity, \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03c3\u03bc\u03bf\u03af \u03b4\u03b9\u03b1\u03c3\u03c6\u03ac\u03bb\u03b9\u03c3\u03b7\u03c2 \u03b9\u03b4\u03b9\u03c9\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.<\/li>\n<li><strong> \u0395\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7:<\/strong> \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b5\u03c2, \u03b7 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ac\u03c0\u03bf\u03c8\u03b7 \u03c4\u03b7\u03c2 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03af\u03b1\u03c2, \u03bd\u03ad\u03b5\u03c2 \u03c4\u03ac\u03c3\u03b5\u03b9\u03c2 (\u03bc\u03b5\u03b3\u03ac\u03bb\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1, \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b5\u03c2 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2, \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03bf \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03cc), \u03bc\u03bf\u03bd\u03c4\u03b5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ce\u03bd \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03b9\u03ce\u03bd.<\/li>\n<li><strong> \u039f\u03bb\u03bf\u03ba\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7 &#8211; \u03a0\u03c1\u03bf\u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd:<\/strong> \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03ba\u03b1\u03b8\u03ac\u03c1\u03b9\u03c3\u03bc\u03b1, \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03c4\u03b9\u03bc\u03ce\u03bd \u03c0\u03bf\u03c5 \u03bb\u03b5\u03af\u03c0\u03bf\u03c5\u03bd, \u03bf\u03bb\u03bf\u03ba\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03b7\u03bc\u03b1\u03c3\u03b9\u03bf\u03bb\u03bf\u03b3\u03b9\u03ba\u03ae \u03b5\u03c4\u03b5\u03c1\u03bf\u03b3\u03ad\u03bd\u03b5\u03b9\u03b1, \u03bf\u03c0\u03c4\u03b9\u03ba\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b3\u03b9\u03b1 \u03bb\u03ae\u03c8\u03b7 \u03b1\u03c0\u03bf\u03c6\u03ac\u03c3\u03b5\u03c9\u03bd.<\/li>\n<li><strong> \u039f\u03bc\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd:<\/strong> \u03bc\u03ad\u03c4\u03c1\u03b1 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \/ \u03bf\u03bc\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03bf\u03cd\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (\u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ac, \u03ba\u03b1\u03c4\u03b7\u03b3\u03bf\u03c1\u03b9\u03ba\u03ac, \u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1), \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03bf\u03bc\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 (\u03b5\u03c1\u03c9\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b5\u03cd\u03c1\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03bf\u03bd\u03c4\u03b9\u03bd\u03cc\u03c4\u03b5\u03c1\u03bf\u03c5 \u03b3\u03b5\u03af\u03c4\u03bf\u03bd\u03b1), \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ae\u03c2 \u03bc\u03ac\u03b8\u03b7\u03c3\u03b7\u03c2.<\/li>\n<li><strong> \u0391\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd:<\/strong> \u03a0\u03bf\u03bb\u03c5\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7 \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03b5\u03be\u03b1\u03b3\u03c9\u03b3\u03ae-\u03bc\u03b5\u03c4\u03b1\u03c3\u03c7\u03b7\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03cc\u03c2-\u03c6\u03cc\u03c1\u03c4\u03c9\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 OLAP, \u03bf\u03b9 \u03b1\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c9\u03c2 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae\u03c2 \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7\u03c2.<\/li>\n<li><strong> \u0395\u03be\u03cc\u03c1\u03c5\u03be\u03b7 \u03b3\u03bd\u03ce\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5:<\/strong> \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b5\u03be\u03cc\u03c1\u03c5\u03be\u03b7\u03c2 \u03b3\u03bd\u03ce\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b7 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7, \u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b5\u03be\u03b1\u03b3\u03c9\u03b3\u03ae\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1\u03c2 \u03b1\u03c0\u03cc \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c0\u03b7\u03b3\u03ad\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf, \u03a0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03bf \u0399\u03c3\u03c4\u03cc, \u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ba\u03ac \u03b4\u03af\u03ba\u03c4\u03c5\u03b1).<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<ul>\n<li>\u0392\u03b1\u03c3\u03b9\u03bb\u03b1\u03ba\u03cc\u03c0\u03bf\u03c5\u03bb\u03bf\u03c2 \u0393. (2009): \u03a3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc\u03c2 \u0392\u03ac\u03c3\u03b5\u03c9\u03bd \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u0391\u03c5\u03c4\u03bf\u03ad\u03ba\u03b4\u03bf\u03c3\u03b7.<\/li>\n<li>Teorey T. J., Lightstone S. S., Nadeau T. and Jagadish H.V. (2011): Database Modeling and Design, Fifth Edition: Logical Design, Morgan Kaufmann, ISBN-10: 0123820200.<\/li>\n<li>Teorey T. J. (1998): Database Modeling &amp; Design: The Fundamental Principles, Morgan Kaufmann, ISBN-10: 1558602941.<\/li>\n<li>Siau K. (2007): Contemporary Issues in Database Design and Information Systems Development, IGI Publishing, ISBN-10: 1599042894.<\/li>\n<li>\u03a7\u03b1\u03bb\u03ba\u03af\u03b4\u03b7 \u039c. \u03ba\u03b1\u03b9 \u0392\u03b1\u03b6\u03b9\u03c1\u03b3\u03b9\u03ac\u03bd\u03bd\u03b7\u03c2 \u039c. (2005): \u0395\u03be\u03cc\u03c1\u03c5\u03be\u03b7 \u0393\u03bd\u03ce\u03c3\u03b7\u03c2 \u03b1\u03c0\u03cc \u0392\u03ac\u03c3\u03b5\u03b9\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd \u03a0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03bf \u0399\u03c3\u03c4\u03cc, \u0395\u03ba\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2 \u0394\u03ac\u03c1\u03b4\u03b1\u03bd\u03bf\u03c2, ISBN: 978-960-402-116-8.<\/li>\n<li>Raymond T.Ng et al. (2013): Perspectives on Business Intelligence. Morgan &amp; Claypool Publishers. Synthesis Lectures on Data Management.<\/li>\n<\/ul>\n<h3>\u03a0\u03c1\u03cc\u03c3\u03b8\u03b5\u03c4\u03b1 \u03a3\u03c5\u03b3\u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03b1<\/h3>\n<ul>\n<li>Silberschatz A., Korth H., and Sudarshan S. (2004): \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u0392\u03ac\u03c3\u03b5\u03c9\u03bd \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (\u03bc\u03b5\u03c4\u03ac\u03c6\u03c1\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b1 \u0395\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ac), \u0395\u03ba\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2 \u0393\u03ba\u03b9\u03bf\u03cd\u03c1\u03b4\u03b1\u03c2, ISBN: 9605123843.<\/li>\n<li>Elmasri R. and Navathe S. B. (2005): \u0398\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b5\u03b9\u03c2 \u0391\u03c1\u03c7\u03ad\u03c2 \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u0392\u03ac\u03c3\u03b5\u03c9\u03bd \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03a4\u03cc\u03bc\u03bf\u03b9 \u0391\u2019 &amp; \u0392\u2019, (\u03bc\u03b5\u03c4\u03ac\u03c6\u03c1\u03b1\u03c3\u03b7 \u039c. \u03a7\u03b1\u03c4\u03b6\u03cc\u03c0\u03bf\u03c5\u03bb\u03bf\u03c2), \u0395\u03ba\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2 \u0394\u03af\u03b1\u03c5\u03bb\u03bf\u03c2, ISBN: (\u03a4\u03cc\u03bc\u03bf\u03c2 A\u2019) 9605312190, (\u03a4\u03cc\u03bc\u03bf\u03c2 \u0392\u2019) 9605311194.<\/li>\n<li>Ramakrishnan, R., Gehrke, J. (2002): \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u0394\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u0392\u03ac\u03c3\u03b5\u03c9\u03bd \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03a4\u03cc\u03bc\u03bf\u03c2 A &amp; \u0392, E\u03ba\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2 \u03a4\u03b6\u03b9\u03cc\u03bb\u03b1, ISBN: (\u03a4\u03cc\u03bc\u03bf\u03c2 A\u2019) 960-8050-70-7, (\u03a4\u03cc\u03bc\u03bf\u03c2 \u0392\u2019) 960-8050-85-5.<\/li>\n<li>Han J. and Kamber M. (2006): Data Mining-Concepts and Techniques. Morgan Kaufmann, ISBN 1-55860-901-6.<\/li>\n<li>Vazirgiannis, M., Halkidi, M. and Gunopoulos, D. (2003): Quality Assessment and Uncertainty Handling in Data Mining, Springer Verlag, LNAI Series, ISBN-10: 1852336552.<\/li>\n<li>Chakrabarti S. (2002): Mining the Web, Discovering Knowledge from Hypertext Data, Morgan Kaufman Publishers, ISBN-10: 1558607544.<\/li>\n<li>Chaudhuri, S, Dayal, U., Narasayya, V. (2011): An Overview of Business Intelligence Technology. Communications of the ACM, Vol. 54 No. 8, Pages 88-98.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u03a3\u03c4\u03cc\u03c7\u03bf\u03c2 \u039a\u03cd\u03c1\u03b9\u03bf\u03c2 \u03c3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b5\u03bc\u03b2\u03ac\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ce\u03bd \u03c3\u03c4\u03b9\u03c2 \u03bc\u03b5\u03b8\u03bf\u03b4\u03bf\u03bb\u03bf\u03b3\u03af\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b5\u03c2 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd. \u03a3\u03c4\u03b1 \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03b1 \u03b8\u03ad\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03b1\u03c6\u03bf\u03c1\u03bf\u03cd\u03bd \u03c3\u03c4\u03bf \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc \u03b2\u03ac\u03c3\u03b5\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03c0\u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b5\u03c2 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03c4\u03bf \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf \u03b5\u03c5\u03c1\u03cd\u03c4\u03b5\u03c1\u03c9\u03bd \u03b4\u03b9\u03ba\u03c4\u03c5\u03bf\u03ba\u03b5\u03bd\u03c4\u03c1\u03b9\u03ba\u03ce\u03bd \u03c3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd. \u0395\u03c0\u03af\u03c3\u03b7\u03c2, \u03b5\u03be\u03b5\u03c4\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b8\u03ad\u03bc\u03b1\u03c4\u03b1 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ae\u03c2 \u03bd\u03bf\u03b7\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7\u03c2, \u03cc\u03c0\u03c9\u03c2 \u03bf\u03bb\u03bf\u03ba\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03c3\u03b9\u03b1\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03bc\u03bf\u03bd\u03c4\u03b5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[110,142],"tags":[],"_links":{"self":[{"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/posts\/3447"}],"collection":[{"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/comments?post=3447"}],"version-history":[{"count":15,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/posts\/3447\/revisions"}],"predecessor-version":[{"id":4324,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/posts\/3447\/revisions\/4324"}],"wp:attachment":[{"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/media?parent=3447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/categories?post=3447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/elearning\/wp-json\/wp\/v2\/tags?post=3447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}