{"id":89,"date":"2026-01-19T19:26:19","date_gmt":"2026-01-19T16:26:19","guid":{"rendered":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/?page_id=89"},"modified":"2026-02-08T16:19:05","modified_gmt":"2026-02-08T13:19:05","slug":"%ce%b1%ce%bd%ce%bf%ce%b9%ce%ba%cf%84%ce%bf%ce%af-%ce%b5%ce%ba%cf%80%ce%b1%ce%b9%ce%b4%ce%b5%cf%85%cf%84%ce%b9%ce%ba%ce%bf%ce%af-%cf%80%cf%8c%cf%81%ce%bf%ce%b9-%ce%b1%ce%b5%cf%80","status":"publish","type":"page","link":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/%ce%b1%ce%bd%ce%bf%ce%b9%ce%ba%cf%84%ce%bf%ce%af-%ce%b5%ce%ba%cf%80%ce%b1%ce%b9%ce%b4%ce%b5%cf%85%cf%84%ce%b9%ce%ba%ce%bf%ce%af-%cf%80%cf%8c%cf%81%ce%bf%ce%b9-%ce%b1%ce%b5%cf%80\/","title":{"rendered":"\u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03bf\u03af \u0395\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03bf\u03af \u03a0\u03cc\u03c1\u03bf\u03b9 (\u0391\u0395\u03a0)"},"content":{"rendered":"<div style=\"font-family: 'Segoe UI', Arial, sans-serif;line-height: 1.6;color: #333;max-width: 800px;margin: 0 auto;background-color: #f9f9f9;padding: 20px;border-radius: 10px;border: 1px solid #ddd\">\n<h2 style=\"text-align: center;color: #2c3e50;border-bottom: 3px solid #e67e22;padding-bottom: 10px\">\u0391\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ae: \u03a3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc\u03c2 \u0392\u03ac\u03c3\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd E-Shop<\/h2>\n<div style=\"text-align: right;margin-top: 15px\"><a style=\"text-decoration: none;color: white;background-color: #2874a6;padding: 8px 15px;border-radius: 5px;font-size: 0.9em\" href=\"https:\/\/oercommons.org\/authoring\/6850-introduction-to-database-systems\/view\" target=\"_blank\" rel=\"noopener\">\u0392\u03b1\u03c3\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c3\u03c4\u03bf\u03bd \u0395\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc \u03a0\u03cc\u03c1\u03bf Introduction to Database Systems <\/a><\/div>\n<div style=\"background-color: #fff;padding: 20px;border-left: 5px solid #3498db;margin: 20px 0\">\n<h3 style=\"color: #3498db;margin-top: 0\">\u0388\u03c7\u03b5\u03b9\u03c2 \u03ad\u03bd\u03b1 \u03bd\u03ad\u03bf \u03bc\u03ae\u03bd\u03c5\u03bc\u03b1!<\/h3>\n<p><strong>\u0391\u03c0\u03cc:<\/strong> CEO \"GadgetWorld\"<br \/>\n<strong>\u0398\u03ad\u03bc\u03b1:<\/strong> \u03a7\u03c1\u03b5\u03b9\u03b1\u03b6\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03bf\u03c1\u03b3\u03ac\u03bd\u03c9\u03c3\u03b7!<\/p>\n<p style=\"font-style: italic\">\"\u0393\u03b5\u03b9\u03b1 \u03c3\u03bf\u03c5! \u0391\u03bd\u03bf\u03af\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03bd\u03ad\u03bf \u03bc\u03b1\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03b9\u03ba\u03cc \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c7\u03c1\u03b5\u03b9\u03b1\u03b6\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03bc\u03b5 \u03c4\u03b1 \u03c7\u03b1\u03c1\u03c4\u03b9\u03ac. \u0398\u03ad\u03bb\u03c9 \u03bd\u03b1 \u03c6\u03c4\u03b9\u03ac\u03be\u03b5\u03b9\u03c2 \u03ad\u03bd\u03b1 \u03c3\u03c7\u03ad\u03b4\u03b9\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b1\u03c2.<\/p>\n<p>\u03a3\u03b7\u03bc\u03b5\u03af\u03c9\u03c3\u03b5 \u03c4\u03b9 \u03c7\u03c1\u03b5\u03b9\u03b1\u03b6\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5:<\/p>\n<p>1. \u0398\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03ba\u03c1\u03b1\u03c4\u03ac\u03bc\u03b5 \u03c4\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03c4\u03c9\u03bd <strong>\u03a0\u03b5\u03bb\u03b1\u03c4\u03ce\u03bd<\/strong> (\u038c\u03bd\u03bf\u03bc\u03b1, Email \u03ba\u03b1\u03b9 \u03bf\u03c0\u03c9\u03c3\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03ad\u03bd\u03b1\u03bd \u03ba\u03c9\u03b4\u03b9\u03ba\u03cc \u03c0\u03b5\u03bb\u03ac\u03c4\u03b7).<br \/>\n2. \u03a0\u03bf\u03c5\u03bb\u03ac\u03bc\u03b5 <strong>\u03a0\u03c1\u03bf\u03ca\u03cc\u03bd\u03c4\u03b1<\/strong>. \u039a\u03ac\u03b8\u03b5 \u03c0\u03c1\u03bf\u03ca\u03cc\u03bd \u03ad\u03c7\u03b5\u03b9 \u03a4\u03b9\u03bc\u03ae, \u03a0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03ba\u03b1\u03b9 Barcode.<br \/>\n3. \u039f\u03b9 \u03c0\u03b5\u03bb\u03ac\u03c4\u03b5\u03c2 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bd <strong>\u03a0\u03b1\u03c1\u03b1\u03b3\u03b3\u03b5\u03bb\u03af\u03b5\u03c2<\/strong>. \u0398\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03be\u03ad\u03c1\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u0397\u03bc\u03b5\u03c1\u03bf\u03bc\u03b7\u03bd\u03af\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd \u0391\u03c1\u03b9\u03b8\u03bc\u03cc \u03c4\u03b7\u03c2 \u03c0\u03b1\u03c1\u03b1\u03b3\u03b3\u03b5\u03bb\u03af\u03b1\u03c2.<\/p>\n<p><strong>\u03a0\u03c1\u03bf\u03c3\u03bf\u03c7\u03ae \u03c3\u03c4\u03b9\u03c2 \u03bb\u03b5\u03c0\u03c4\u03bf\u03bc\u03ad\u03c1\u03b5\u03b9\u03b5\u03c2:<\/strong> \u0388\u03bd\u03b1\u03c2 \u03c0\u03b5\u03bb\u03ac\u03c4\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03b9 \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03c0\u03b1\u03c1\u03b1\u03b3\u03b3\u03b5\u03bb\u03af\u03b5\u03c2. \u039c\u03b9\u03b1 \u03c0\u03b1\u03c1\u03b1\u03b3\u03b3\u03b5\u03bb\u03af\u03b1 \u03cc\u03bc\u03c9\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03c0\u03bf\u03bb\u03bb\u03ac \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03c0\u03c1\u03bf\u03ca\u03cc\u03bd\u03c4\u03b1!\"<\/p>\n<\/div>\n<h3 style=\"color: #2c3e50\">\u03a4\u03b1 \u0392\u03ae\u03bc\u03b1\u03c4\u03ac \u03c3\u03bf\u03c5:<\/h3>\n<div style=\"flex-wrap: wrap;gap: 15px\">\n<div style=\"flex: 1;min-width: 200px;background: #e8f6f3;padding: 15px;border-radius: 8px\"><strong style=\"color: #16a085\">\u0392\u03ae\u03bc\u03b1 1:<\/strong><br \/>\n\u0395\u03bd\u03c4\u03cc\u03c0\u03b9\u03c3\u03b5 \u03c4\u03b9\u03c2 3 <strong>\u039f\u03bd\u03c4\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2<\/strong> (Entities) \u03ba\u03b1\u03b9 \u03c4\u03b1 <strong>\u0393\u03bd\u03c9\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03ac<\/strong> \u03c4\u03bf\u03c5\u03c2 (Attributes).<\/div>\n<div style=\"flex: 1;min-width: 200px;background: #fef9e7;padding: 15px;border-radius: 8px\"><strong style=\"color: #f1c40f\">\u0392\u03ae\u03bc\u03b1 2:<\/strong><br \/>\n\u0392\u03c1\u03b5\u03c2 \u03c4\u03b9\u03c2 <strong>\u03a3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2<\/strong> (Relationships). \u03a0\u03bf\u03b9\u03bf\u03c2 \u03c3\u03c5\u03bd\u03b4\u03ad\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c0\u03bf\u03b9\u03bf\u03bd;<\/div>\n<div style=\"flex: 1;min-width: 200px;background: #f4ecf7;padding: 15px;border-radius: 8px\"><strong style=\"color: #9b59b6\">\u0392\u03ae\u03bc\u03b1 3:<\/strong><br \/>\n\u03a6\u03c4\u03b9\u03ac\u03be\u03b5 \u03c4\u03bf <strong>\u0394\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 ER<\/strong> \u03c3\u03ad\u03c1\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b1 \u03c3\u03c9\u03c3\u03c4\u03ac \u03c3\u03cd\u03bc\u03b2\u03bf\u03bb\u03b1 \u03c3\u03c4\u03bf\u03bd \u03ba\u03b1\u03bc\u03b2\u03ac!<\/div>\n<\/div>\n<div style=\"margin-top: 20px;border-top: 1px solid #ddd;padding-top: 10px;font-size: 0.9em;color: #555\"><strong>\u00a0 \u03a5\u03c0\u03cc\u03bc\u03bd\u03b7\u03bc\u03b1:<\/strong><br \/>\n\ud83d\udfe6 <strong>\u039f\u03c1\u03b8\u03bf\u03b3\u03ce\u03bd\u03b9\u03bf:<\/strong> \u039f\u03bd\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 (\u03c0.\u03c7. \u039c\u03b1\u03b8\u03b7\u03c4\u03ae\u03c2)<br \/>\n\ud83d\udd36 <strong>\u03a1\u03cc\u03bc\u03b2\u03bf\u03c2:<\/strong> \u03a3\u03c5\u03c3\u03c7\u03ad\u03c4\u03b9\u03c3\u03b7 (\u03c0.\u03c7. \u0394\u03b9\u03b1\u03b2\u03ac\u03b6\u03b5\u03b9)<br \/>\n\u26aa <strong>\u0388\u03bb\u03bb\u03b5\u03b9\u03c8\u03b7:<\/strong> \u0393\u03bd\u03ce\u03c1\u03b9\u03c3\u03bc\u03b1 (\u03c0.\u03c7. \u0395\u03c0\u03ce\u03bd\u03c5\u03bc\u03bf)<\/div>\n<div>\u039c\u03b5\u03bb\u03b5\u03c4\u03af\u03c3\u03c4\u03b5 \u03c4\u03b7\u03bd \u0395\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 4 \u03c4\u03bf\u03c5 \u03b1\u03c1\u03c7\u03b5\u03af\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03b4\u03af\u03bd\u03b5\u03c4\u03b1\u03b9<\/div>\n<div><iframe allow=\"microphone https:\/\/content.e-me-4all.eu\" src=\"https:\/\/content.e-me-4all.eu\/wp-admin\/admin-ajax.php?action=h5p_embed&id=[eme_content_id 111676]\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" onload=\"iFrameResize({heightCalculationMethod:'max'})\"><\/iframe><\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<div style=\"font-family: 'Segoe UI', Arial, sans-serif;line-height: 1.6;color: #333;max-width: 800px;margin: 0 auto;background-color: #f9f9f9;padding: 20px;border-radius: 10px;border: 1px solid #ddd\">\n<div style=\"font-family: 'Segoe UI', Arial, sans-serif;line-height: 1.6;color: #333;max-width: 800px;margin: 0 auto;background-color: #fdfefe;padding: 25px;border-radius: 12px;border: 1px solid #eaecee\">\n<h2 style=\"text-align: center;color: #2e86c1;border-bottom: 2px solid #2e86c1;padding-bottom: 10px\">\u0391\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ae: \u0391\u03bd\u03b1\u03b3\u03bd\u03ce\u03c1\u03b9\u03c3\u03b7 \u039c\u03bf\u03bd\u03c4\u03ad\u03bb\u03c9\u03bd \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/h2>\n<div style=\"text-align: right;margin-top: 15px\"><a style=\"text-decoration: none;color: white;background-color: #2874a6;padding: 8px 15px;border-radius: 5px;font-size: 0.9em\" href=\"https:\/\/oercommons.org\/courseware\/lesson\/138385\/overview\" target=\"_blank\" rel=\"noopener\">\u0392\u03b1\u03c3\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c3\u03c4\u03bf\u03bd \u0395\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc \u03a0\u03cc\u03c1\u03bf BRIEF OVERVIEW ABOUT DATABASE <\/a><\/div>\n<p><strong>\u03a4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1:<\/strong> \u0394\u03b5\u03bd \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03cc\u03bb\u03b1 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03bc\u03b5 \u03c4\u03bf\u03bd \u03af\u03b4\u03b9\u03bf \u03c4\u03c1\u03cc\u03c0\u03bf! \u0391\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03bf\u03c7\u03ae \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03ac\u03b3\u03ba\u03b5\u03c2, \u03bf\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03ae\u03bc\u03bf\u03bd\u03b5\u03c2 \u03b5\u03c0\u03b9\u03bd\u03cc\u03b7\u03c3\u03b1\u03bd \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ad\u03c2 \"\u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2\".<\/p>\n<p>\u0397 \u03b4\u03bf\u03c5\u03bb\u03b5\u03b9\u03ac \u03c3\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03bc\u03b5\u03bb\u03b5\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03b1 \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 <strong>4 \u039c\u03bf\u03bd\u03c4\u03ad\u03bb\u03b1<\/strong> \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c4\u03b1 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03af\u03c3\u03b5\u03b9\u03c2 \u03c3\u03c9\u03c3\u03c4\u03ac \u03c3\u03c4\u03b7 \u03b4\u03c1\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03b5\u03af.<\/p>\n<\/div>\n<div style=\"grid-template-columns: 1fr 1fr;gap: 20px\">\n<div style=\"border: 1px solid #ddd;padding: 15px;border-radius: 8px;background: #fff\">\n<h4 style=\"color: #c0392b;margin-top: 0\">1. \u0399\u03b5\u03c1\u03b1\u03c1\u03c7\u03b9\u03ba\u03cc (Hierarchical)<\/h4>\n<p style=\"font-size: 0.9em\">\u039c\u03bf\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03b5 <strong>\u03b1\u03bd\u03ac\u03c0\u03bf\u03b4\u03bf \u03b4\u03ad\u03bd\u03c4\u03c1\u03bf<\/strong> .<br \/>\n\u039a\u03ac\u03b8\u03b5 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03bf \u03ad\u03c7\u03b5\u03b9 \u03ad\u03bd\u03b1\u03bd \u03bc\u03cc\u03bd\u03bf \"\u03b3\u03bf\u03bd\u03b9\u03cc\" \u03b1\u03bb\u03bb\u03ac \u03c0\u03bf\u03bb\u03bb\u03ac \"\u03c0\u03b1\u03b9\u03b4\u03b9\u03ac\". \u0395\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c0\u03b1\u03bb\u03b1\u03b9\u03cc\u03c4\u03b5\u03c1\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf.<\/p>\n<\/div>\n<div style=\"border: 1px solid #ddd;padding: 15px;border-radius: 8px;background: #fff\">\n<h4 style=\"color: #8e44ad;margin-top: 0\">2. \u0394\u03b9\u03ba\u03c4\u03c5\u03c9\u03c4\u03cc (Network)<\/h4>\n<p style=\"font-size: 0.9em\">\u039c\u03bf\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03b5 <strong>\u03b9\u03c3\u03c4\u03cc \u03b1\u03c1\u03ac\u03c7\u03bd\u03b7\u03c2<\/strong> .<br \/>\n\u0388\u03bd\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03bf \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03c0\u03bf\u03bb\u03bb\u03bf\u03cd\u03c2 \"\u03b3\u03bf\u03bd\u03b5\u03af\u03c2\" \u03ba\u03b1\u03b9 \u03c0\u03bf\u03bb\u03bb\u03ac \"\u03c0\u03b1\u03b9\u03b4\u03b9\u03ac\". \u0395\u03af\u03bd\u03b1\u03b9 \u03c0\u03b9\u03bf \u03b5\u03c5\u03ad\u03bb\u03b9\u03ba\u03c4\u03bf \u03b1\u03c0\u03cc \u03c4\u03bf \u03b4\u03ad\u03bd\u03c4\u03c1\u03bf \u03b1\u03bb\u03bb\u03ac \u03c0\u03bf\u03bb\u03cd\u03c0\u03bb\u03bf\u03ba\u03bf.<\/p>\n<\/div>\n<div style=\"border: 1px solid #ddd;padding: 15px;border-radius: 8px;background: #fff\">\n<h4 style=\"color: #2980b9;margin-top: 0\">3. \u03a3\u03c7\u03b5\u03c3\u03b9\u03b1\u03ba\u03cc (Relational)<\/h4>\n<p style=\"font-size: 0.9em\">\u039c\u03bf\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03b5 <strong>\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c6\u03cd\u03bb\u03bb\u03b1<\/strong> .<br \/>\n\u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03bc\u03c0\u03b1\u03af\u03bd\u03bf\u03c5\u03bd \u03c3\u03b5 <strong>\u03a0\u03af\u03bd\u03b1\u03ba\u03b5\u03c2<\/strong> (\u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03ae\u03bb\u03b5\u03c2) \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2. \u0395\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c0\u03b9\u03bf \u03b4\u03b9\u03b1\u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf \u03c3\u03ae\u03bc\u03b5\u03c1\u03b1 (SQL).<\/p>\n<\/div>\n<div style=\"border: 1px solid #ddd;padding: 15px;border-radius: 8px;background: #fff\">\n<h4 style=\"color: #27ae60;margin-top: 0\">4. Cloud \/ NoSQL<\/h4>\n<p style=\"font-size: 0.9em\">\u039c\u03bf\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03b5 <strong>\u03c6\u03b1\u03ba\u03ad\u03bb\u03bf\u03c5\u03c2 \u03b5\u03b3\u03b3\u03c1\u03ac\u03c6\u03c9\u03bd<\/strong> .<br \/>\n\u0394\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03b1\u03c5\u03c3\u03c4\u03b7\u03c1\u03bf\u03cd\u03c2 \u03c0\u03af\u03bd\u03b1\u03ba\u03b5\u03c2. \u0391\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03b5\u03b9 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b1\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c4\u03b1 \u03ae \u03c3\u03b5 \u03b6\u03b5\u03cd\u03b3\u03b7 (\u039a\u03bb\u03b5\u03b9\u03b4\u03af: \u03a4\u03b9\u03bc\u03ae). \u0399\u03b4\u03b1\u03bd\u03b9\u03ba\u03cc \u03b3\u03b9\u03b1 Big Data.<\/p>\n<\/div>\n<\/div>\n<p style=\"text-align: center;margin-top: 20px;font-weight: bold;color: #555\">\ud83d\udc47 \u03a0\u03c1\u03bf\u03c7\u03ce\u03c1\u03b1 \u03c3\u03c4\u03b7\u03bd \u03ac\u03c3\u03ba\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b2\u03ac\u03bb\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c4\u03b9\u03ba\u03ad\u03c4\u03b1 \u03c3\u03c4\u03bf \u03c3\u03c9\u03c3\u03c4\u03cc \u03b4\u03b9\u03ac\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1!<\/p>\n<iframe allow=\"microphone https:\/\/content.e-me-4all.eu\" src=\"https:\/\/content.e-me-4all.eu\/wp-admin\/admin-ajax.php?action=h5p_embed&id=<p>[eme_content_id 111759]<\/p>\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" onload=\"iFrameResize({heightCalculationMethod:'max'})\"><\/iframe>\n<\/div>\n<div style=\"text-align: right;margin-top: 15px\"><a style=\"text-decoration: none;color: white;background-color: #2874a6;padding: 8px 15px;border-radius: 5px;font-size: 0.9em\" href=\"https:\/\/oercommons.org\/courseware\/lesson\/138385\/overview\" target=\"_blank\" rel=\"noopener\">\u0392\u03b1\u03c3\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c3\u03b5: BRIEF OVERVIEW ABOUT DATABASE <\/a><\/div>\n<p><strong>Infographic<\/strong> (\u03c0\u03b1\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c0\u03ac\u03bd\u03c9 \u03c4\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03ac\u03bd\u03bf\u03b9\u03b3\u03bc\u03b1 \u03c3\u03c4\u03bf Canva)<a href=\"https:\/\/www.canva.com\/design\/DAG-9pdP-Jk\/KMuZO0NbNZX0eOCjryV6og\/edit?utm_content=DAG-9pdP-Jk&amp;utm_campaign=designshare&amp;utm_medium=link2&amp;utm_source=sharebutton\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-96 size-full\" src=\"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.png\" alt=\"\" width=\"2000\" height=\"1414\" srcset=\"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.png 2000w, https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd-300x212.png 300w, https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd-1024x724.png 1024w, https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd-768x543.png 768w, https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-content\/uploads\/sites\/15855\/2026\/01\/\u0397-\u0395\u03be\u03ad\u03bb\u03b9\u03be\u03b7-\u03a4\u03b1-\u0395\u03af\u03b4\u03b7-\u03c4\u03c9\u03bd-\u0392\u03ac\u03c3\u03b5\u03c9\u03bd-\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd-1536x1086.png 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0391\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ae: \u03a3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc\u03c2 \u0392\u03ac\u03c3\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd E-Shop \u0392\u03b1\u03c3\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c3\u03c4\u03bf\u03bd \u0395\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc \u03a0\u03cc\u03c1\u03bf Introduction to Database Systems \u0388\u03c7\u03b5\u03b9\u03c2 \u03ad\u03bd\u03b1 \u03bd\u03ad\u03bf \u03bc\u03ae\u03bd\u03c5\u03bc\u03b1! \u0391\u03c0\u03cc: CEO &#8220;GadgetWorld&#8221; \u0398\u03ad\u03bc\u03b1: \u03a7\u03c1\u03b5\u03b9\u03b1\u03b6\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03bf\u03c1\u03b3\u03ac\u03bd\u03c9\u03c3\u03b7! &#8220;\u0393\u03b5\u03b9\u03b1 \u03c3\u03bf\u03c5! \u0391\u03bd\u03bf\u03af\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03bd\u03ad\u03bf \u03bc\u03b1\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03b9\u03ba\u03cc \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c7\u03c1\u03b5\u03b9\u03b1\u03b6\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03bc\u03b5 \u03c4\u03b1 \u03c7\u03b1\u03c1\u03c4\u03b9\u03ac. \u0398\u03ad\u03bb\u03c9 &hellip; <\/p>\n<div class=\"more-link-wrapper\"><a href=\"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/%ce%b1%ce%bd%ce%bf%ce%b9%ce%ba%cf%84%ce%bf%ce%af-%ce%b5%ce%ba%cf%80%ce%b1%ce%b9%ce%b4%ce%b5%cf%85%cf%84%ce%b9%ce%ba%ce%bf%ce%af-%cf%80%cf%8c%cf%81%ce%bf%ce%b9-%ce%b1%ce%b5%cf%80\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;\u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03bf\u03af \u0395\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03bf\u03af \u03a0\u03cc\u03c1\u03bf\u03b9 (\u0391\u0395\u03a0)&#8221;<\/span><\/a><\/div>\n","protected":false},"author":61208,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-89","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/pages\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/users\/61208"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/comments?post=89"}],"version-history":[{"count":0,"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/pages\/89\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.e-me-4all.eu\/tsilispyr\/wp-json\/wp\/v2\/media?parent=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}