{"id":1978,"date":"2018-09-12T12:29:57","date_gmt":"2018-09-12T12:29:57","guid":{"rendered":"http:\/\/levadia.gr\/docs\/mapstore\/%cf%87%ce%b1%cf%81%cf%84%ce%b5%cf%82\/%ce%b3%cf%81%ce%b1%cf%86%ce%ae%ce%bc%ce%b1%cf%84%ce%b1\/"},"modified":"2018-09-12T12:36:55","modified_gmt":"2018-09-12T12:36:55","slug":"%ce%b3%cf%81%ce%b1%cf%86%ce%ae%ce%bc%ce%b1%cf%84%ce%b1","status":"publish","type":"docs","link":"https:\/\/levadia.gr\/?docs=mapstore\/%cf%87%ce%b1%cf%81%cf%84%ce%b5%cf%82\/%ce%b3%cf%81%ce%b1%cf%86%ce%ae%ce%bc%ce%b1%cf%84%ce%b1","title":{"rendered":"\u0393\u03c1\u03b1\u03c6\u03ae\u03bc\u03b1\u03c4\u03b1"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p align=\"justify\">\u03bf \u039a\u03bf\u03c5\u03bc\u03c0\u03af Widgets \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b5\u03bc\u03c6\u03b1\u03bd\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c3\u03b5 \u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ad\u03c2 \u03b1\u03bd\u03b1\u03c0\u03b1\u03c1\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b1\u03bd\u03b1\u03b6\u03b7\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03bc\u03b1\u03c2. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2 \u03b4\u03b9\u03b1\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd, \u03b5\u03c0\u03b9\u03bb\u03ad\u03b3\u03bf\u03c5\u03bc\u03b5 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03bb\u03af\u03c3\u03c4\u03b1 \u03c4\u03bf\u03bd \u03c4\u03cd\u03c0\u03bf \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03c5\u03bc\u03b5. \u03a5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd 4 \u03b5\u03af\u03b4\u03b7 \u03b4\u03b9\u03b1\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd. \u0394\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03c1\u03ac\u03b2\u03b4\u03c9\u03bd , \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03a0\u03af\u03c4\u03b1, \u03b3\u03c1\u03b1\u03bc\u03bc\u03b9\u03ba\u03cc \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 Gause. \u038c\u03bb\u03bf\u03b9 \u03bf\u03b9 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03b4\u03b9\u03b1\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03bc\u03b5 \u03c4\u03b7\u03bd \u03af\u03b4\u03b9\u03b1 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ae.<\/p>\n<p><a href=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/\u03b3\u03c1\u03b1\u03c6\u03b7\u03bc\u03b1\u03c4\u03b1.gif\" data-rel=\"prettyPhoto[1978]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1979 aligncenter\" src=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/\u03b3\u03c1\u03b1\u03c6\u03b7\u03bc\u03b1\u03c4\u03b1.gif\" alt=\"\" width=\"270\" height=\"249\" \/><\/a><\/p>\n<p align=\"justify\">\u0395\u03c0\u03b9\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03c4\u03cd\u03c0\u03bf \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03c3\u03c4\u03b5 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03b7 \u03bf\u03b8\u03cc\u03bd\u03b7.<\/p>\n<p align=\"justify\"><span style=\"color: #3366ff;\"><em>(\u03b3\u03b9\u03b1 \u03c4\u03bf \u03c0\u03b1\u03c1\u03cc\u03bd \u03c0\u03b1\u03c1\u03ac\u03b4\u03b5\u03b9\u03b3\u03bc\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03b1\u03bc\u03b5 \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03c1\u03ac\u03b2\u03b4\u03c9\u03bd \u03b1\u03bb\u03bb\u03ac \u03cc\u03bb\u03b1 \u03c4\u03b1 \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03b1 \u03c1\u03c5\u03b8\u03bc\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03bf\u03bd \u03af\u03b4\u03b9\u03bf \u03c4\u03c1\u03cc\u03c0\u03bf)<\/em><\/span><\/p>\n<p align=\"justify\"><a href=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/diagrams.gif\" data-rel=\"prettyPhoto[1978]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1981 aligncenter\" src=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/diagrams.gif\" alt=\"\" width=\"310\" height=\"170\" \/><\/a><\/p>\n<ol>\n<li>\u039c\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 1 \u03bf\u03b4\u03b7\u03b3\u03bf\u03cd\u03bc\u03b1\u03c3\u03c4\u03b5 \u03c3\u03c4\u03b1 \u03c6\u03af\u03bb\u03c4\u03c1\u03b1 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1<\/li>\n<li>\u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03bc\u03b1\u03c2 \u03c3\u03cd\u03bc\u03c6\u03c9\u03bd\u03b1 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03bf\u03b4\u03b7\u03b3\u03af\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03c0\u03ac\u03bd\u03c9 \u03c4\u03bc\u03ae\u03bc\u03b1 5c<\/li>\n<li>\u03a3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 2 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03bc\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03a7<\/li>\n<li>\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 3 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03bc\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03a5<\/li>\n<li>\u039c\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae operation \u03b4\u03b9\u03b1\u03bb\u03ad\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03c3\u03c4\u03b1\u03c4\u03b9\u03c3\u03c4\u03b9\u03ba\u03ae \u03c4\u03b9\u03bc\u03ae \u03c0\u03bf\u03c5 \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03bf \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1. \u03b7 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 count \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03c3\u03c4\u03b5\u03af \u03c3\u03b5 \u03b3\u03bd\u03c9\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03b1 \u03bf\u03c0\u03bf\u03b9\u03bf\u03c5\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03c4\u03cd\u03c0\u03bf\u03c5, \u03bf\u03b9 \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 avg \u03ba\u03b1\u03b9 sum \u03b5\u03c6\u03b1\u03c1\u03bc\u03cc\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03cc\u03bd\u03bf \u03c3\u03b5 \u03b3\u03bd\u03c9\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03c4\u03cd\u03c0\u03c9\u03bd. O\u03b9 \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 min \u03ba\u03b1\u03b9 max \u03b5\u03c6\u03b1\u03c1\u03bc\u03cc\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b3\u03bd\u03c9\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03ae \u03b1\u03bb\u03c6\u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03c4\u03cd\u03c0\u03c9\u03bd. \u03a5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03c0\u03ad\u03bd\u03c4\u03b5 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c3\u03c5\u03bd\u03ac\u03b8\u03c1\u03bf\u03b9\u03c3\u03b7\u03c2, \u03c0\u03bf\u03c5 \u03c5\u03c0\u03bf- \u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03cc\u03bb\u03b1 \u03c4\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 SQL COUNT \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c0\u03bb\u03ae\u03b8\u03bf\u03c5\u03c2 SUM \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ac\u03b8\u03c1\u03bf\u03b9\u03c3\u03bc\u03b1 AVG \u03b3\u03b9\u03b1 \u03c4\u03bf \u03bc\u03ad\u03c3\u03bf \u03cc\u03c1\u03bf MIN \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b9\u03bc\u03ae MAX \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b9\u03bc\u03ae.<\/li>\n<li>\u03a3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03c7\u03c1\u03ce\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03b3\u03c1\u03b1\u03c6\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2<\/li>\n<li>\u03a3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 6 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03bf\u03c5\u03bc\u03b5 \u03b1\u03bd \u03b8\u03b1 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 live \u03c6\u03af\u03bb\u03c4\u03c1\u03bf<\/li>\n<li>\u03a3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 7 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03bb\u03ad\u03be\u03bf\u03c5\u03bc\u03b5 \u03b1\u03bd \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03c5\u03c0\u03cc\u03bc\u03bd\u03b7\u03bc\u03b1.<\/li>\n<li>\u039c\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae 8 \u03bf\u03b4\u03b7\u03b3\u03bf\u03cd\u03bc\u03b1\u03c3\u03c4\u03b5 \u03c3\u03c4\u03b7\u03bd \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03b3\u03c1\u03b1\u03c6\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2<\/li>\n<\/ol>\n<p><a href=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/diagrams1.gif\" data-rel=\"prettyPhoto[1978]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1982 aligncenter\" src=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/diagrams1.gif\" alt=\"\" width=\"220\" height=\"205\" \/><\/a><\/p>\n<p>\u038c\u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b8\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03af\u03c4\u03bb\u03bf \u03ba\u03b1\u03b9 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae. \u0391\u03bd \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b3\u03c5\u03c1\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03b7\u03b3\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03bf\u03b8\u03cc\u03bd\u03b7 \u03ae \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b8\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03ba\u03b1\u03b9 \u03ac\u03bb\u03bb\u03b1 \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03b1 \u03b8\u03b1 \u03c0\u03b1\u03c4\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03c3\u03cd\u03bc\u03b2\u03bf\u03bb\u03bf 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src=\"http:\/\/levadia.gr\/wp-content\/uploads\/2018\/09\/diagrams3.gif\" alt=\"\" width=\"285\" height=\"66\" \/><\/a><\/p>\n<p align=\"justify\">\n 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