{"id":1573,"date":"2026-03-23T10:40:55","date_gmt":"2026-03-23T10:40:55","guid":{"rendered":"https:\/\/www.go-diagram.com\/tw\/database-developer-interview-prep-erd-questions\/"},"modified":"2026-03-23T10:40:55","modified_gmt":"2026-03-23T10:40:55","slug":"database-developer-interview-prep-erd-questions","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/tw\/database-developer-interview-prep-erd-questions\/","title":{"rendered":"\u8cc7\u6599\u5eab\u958b\u767c\u4eba\u54e1\u9762\u8a66\u6e96\u5099\uff1a\u5e38\u898bERD\u554f\u984c\u89e3\u7b54"},"content":{"rendered":"<p>\u61c9\u8058\u8cc7\u6599\u5eab\u958b\u767c\u4eba\u54e1\u8077\u4f4d\u7684\u6280\u8853\u9762\u8a66\uff0c\u4e0d\u50c5\u9700\u8981\u719f\u7df4\u638c\u63e1SQL\u8a9e\u6cd5\uff0c\u66f4\u9700\u5c55\u73fe\u5c0d\u8cc7\u6599\u7d50\u69cb\u3001\u95dc\u806f\u8207\u7dad\u8b77\u65b9\u5f0f\u7684\u6df1\u5165\u7406\u89e3\u3002\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u662f\u8cc7\u6599\u6a21\u578b\u8a2d\u8a08\u7684\u57fa\u77f3\uff0c\u5b83\u4f5c\u70ba\u8cc7\u6599\u5eab\u67b6\u69cb\u7684\u8996\u89ba\u85cd\u5716\u3002<\/p>\n<p>\u9762\u8a66\u5b98\u6703\u900f\u904eERD\u554f\u984c\u4f86\u8a55\u4f30\u4f60\u5c07\u696d\u52d9\u9700\u6c42\u8f49\u5316\u70ba\u6280\u8853\u7d50\u69cb\u7684\u80fd\u529b\u3002\u4ed6\u5011\u5e0c\u671b\u78ba\u8a8d\u4f60\u662f\u5426\u7406\u89e3\u57fa\u6578\u3001\u898f\u7bc4\u5316\u8207\u8cc7\u6599\u5b8c\u6574\u6027\u3002\u672c\u6307\u5357\u5c07\u5e36\u4f60\u4e86\u89e3\u95dc\u9375\u6982\u5ff5\u4ee5\u53ca\u9762\u8a66\u4e2d\u5e38\u898b\u7684\u5be6\u969b\u60c5\u5883\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Child's drawing style infographic for database developer interview preparation covering Entity Relationship Diagram (ERD) fundamentals: entities, attributes, relationships, cardinality types (1:1, 1:N, M:N), normalization steps (1NF, 2NF, 3NF), common interview questions, and a library system scenario example, presented with playful crayon textures, bright colors, and simple hand-drawn illustrations for intuitive learning\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/erd-interview-prep-infographic-childs-drawing.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udd0d \u7406\u89e3ERD\u7684\u6838\u5fc3\u7d44\u6210\u8981\u7d20<\/h2>\n<p>\u5728\u8655\u7406\u8907\u96dc\u60c5\u5883\u4e4b\u524d\uff0c\u4f60\u5fc5\u9808\u7262\u7262\u638c\u63e1\u57fa\u672c\u69cb\u5efa\u6a21\u584a\u3002ERD\u4e0d\u50c5\u50c5\u662f\u4e00\u5f35\u5716\uff0c\u66f4\u662f\u898f\u5247\u8207\u7d04\u675f\u7684\u5448\u73fe\u3002<\/p>\n<ul>\n<li><strong>\u5be6\u9ad4\uff1a<\/strong> \u5b83\u5011\u4ee3\u8868\u73fe\u5be6\u4e16\u754c\u4e2d\u7684\u7269\u4ef6\u6216\u6982\u5ff5\uff0c\u4f8b\u5982\u5ba2\u6236\u3001\u8a02\u55ae\u6216\u7522\u54c1\u3002\u5728\u8cc7\u6599\u5eab\u4e2d\uff0c\u9019\u4e9b\u5c0d\u61c9\u5230\u8cc7\u6599\u8868\u3002<\/li>\n<li><strong>\u5c6c\u6027\uff1a<\/strong> \u5b83\u5011\u662f\u63cf\u8ff0\u5be6\u9ad4\u7684\u7279\u6027\u3002\u4f8b\u5982\u5ba2\u6236\u5be6\u9ad4\u7684\u5c6c\u6027\u53ef\u80fd\u5305\u62ec\u59d3\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u548c\u96fb\u8a71\u865f\u78bc\u3002\u9019\u4e9b\u5c0d\u61c9\u5230\u8cc7\u6599\u6b04\u4f4d\u3002<\/li>\n<li><strong>\u95dc\u4fc2\uff1a<\/strong> \u5b83\u5011\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u4e4b\u9593\u7684\u4e92\u52d5\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c\u5ba2\u6236\u4e0b\u8a02\u55ae\u3002\u9019\u7a2e\u4e92\u52d5\u78ba\u5b9a\u4e86\u5169\u500b\u8cc7\u6599\u8868\u4e4b\u9593\u7684\u9023\u7d50\u3002<\/li>\n<\/ul>\n<p>\u7e6a\u88fd\u9019\u4e9b\u5716\u8868\u6642\uff0c\u6e05\u6670\u5ea6\u81f3\u95dc\u91cd\u8981\u3002\u8acb\u4f7f\u7528\u6a19\u6e96\u7b26\u865f\uff0c\u4ee5\u78ba\u4fdd\u5176\u4ed6\u958b\u767c\u4eba\u54e1\u80fd\u6e05\u695a\u7406\u89e3\u4f60\u7684\u8a2d\u8a08\uff0c\u4e0d\u6703\u7522\u751f\u6df7\u6dc6\u3002<\/p>\n<h2>\ud83d\udcca \u57fa\u6578\u8207\u53c3\u8207\u5ea6\uff1a\u95dc\u4fc2\u7684\u6838\u5fc3<\/h2>\n<p>\u57fa\u6578\u5b9a\u7fa9\u4e86\u4e00\u500b\u5be6\u9ad4\u7684\u5be6\u4f8b\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u5be6\u4f8b\u4e4b\u9593\u53ef\u4ee5\u6216\u5fc5\u9808\u5efa\u7acb\u7684\u95dc\u4fc2\u6578\u91cf\u3002\u9019\u901a\u5e38\u662f\u9762\u8a66\u4e2d\u6700\u53d7\u95dc\u6ce8\u7684\u90e8\u5206\u3002<\/p>\n<p>\u4f60\u5fc5\u9808\u719f\u6089\u4e26\u80fd\u6e05\u695a\u89e3\u91cb\u56db\u7a2e\u4e3b\u8981\u7684\u57fa\u6578\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5bf9\u4e00\uff081:1\uff09\uff1a<\/strong> \u5be6\u9ad4A\u7684\u4e00\u500b\u5be6\u4f8b\u50c5\u8207\u5be6\u9ad4B\u7684\u4e00\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u7bc4\u4f8b\uff1a\u4e00\u500b\u4eba\u64c1\u6709\u4e00\u5f35\u8b77\u7167\u3002<\/li>\n<li><strong>\u4e00\u5bf9\u591a\uff081:N\uff09\uff1a<\/strong> \u5be6\u9ad4A\u7684\u4e00\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4B\u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u7bc4\u4f8b\uff1a\u4e00\u500b\u90e8\u9580\u64c1\u6709\u591a\u540d\u54e1\u5de5\u3002<\/li>\n<li><strong>\u591a\u5c0d\u4e00\uff08N:1\uff09\uff1a<\/strong> \u4e00\u5bf9\u591a\u7684\u53cd\u5411\u3002\u5be6\u9ad4A\u7684\u591a\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4B\u7684\u4e00\u500b\u5be6\u4f8b\u76f8\u95dc\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff08M:N\uff09\uff1a<\/strong> \u5be6\u9ad4A\u7684\u591a\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4B\u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u7bc4\u4f8b\uff1a\u5b78\u751f\u9078\u4fee\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u8ab2\u7a0b\u4e5f\u5305\u542b\u591a\u540d\u5b78\u751f\u3002<\/li>\n<\/ul>\n<p>\u9762\u8a66\u5b98\u7d93\u5e38\u8981\u6c42\u4f60\u5728\u696d\u52d9\u60c5\u5883\u4e2d\u8fa8\u8b58\u9019\u4e9b\u95dc\u4fc2\u3002\u4f60\u5fc5\u9808\u80fd\u89e3\u91cb\u70ba\u4f55\u67d0\u7a2e\u95dc\u4fc2\u6703\u5982\u6b64\u8a2d\u8a08\u3002<\/p>\n<h3>\u57fa\u6578\u53c3\u8003\u8868<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u95dc\u4fc2\u985e\u578b<\/th>\n<th>\u7b26\u865f\u8868\u793a<\/th>\n<th>\u8cc7\u6599\u5eab\u5be6\u4f5c<\/th>\n<th>\u7bc4\u4f8b\u60c5\u5883<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e00\u5bf9\u4e00<\/td>\n<td>1:1<\/td>\n<td>\u4e00\u500b\u8868\u683c\u4e2d\u7684\u5916\u9375<\/td>\n<td>\u4f7f\u7528\u8005\u8207\u500b\u4eba\u6a94\u6848<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u5c0d\u591a<\/td>\n<td>1:N<\/td>\n<td>\u300e\u591a\u300f\u65b9\u8868\u683c\u4e2d\u7684\u5916\u9375<\/td>\n<td>\u4f5c\u8005\u8207\u66f8\u7c4d<\/td>\n<\/tr>\n<tr>\n<td>\u591a\u5c0d\u591a<\/td>\n<td>M:N<\/td>\n<td>\u5305\u542b\u5169\u500b\u5916\u9375\u7684\u95dc\u806f\u8868\u683c<\/td>\n<td>\u5b78\u751f\u8207\u8ab2\u7a0b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83e\udde9 \u6b63\u898f\u5316\u8207\u5be6\u9ad4\u95dc\u4fc2\u5716\u8a2d\u8a08<\/h2>\n<p>\u6b63\u898f\u5316\u662f\u7d44\u7e54\u8cc7\u6599\u4ee5\u6e1b\u5c11\u91cd\u8907\u4e26\u63d0\u5347\u5b8c\u6574\u6027\u7684\u4e00\u500b\u904e\u7a0b\u3002\u96d6\u7136\u901a\u5e38\u88ab\u5206\u958b\u6559\u6388\uff0c\u4f46\u6b63\u898f\u5316\u6703\u76f4\u63a5\u5f71\u97ff\u4f60\u7e6a\u88fd\u5be6\u9ad4\u95dc\u4fc2\u5716\u7684\u65b9\u5f0f\u3002<\/p>\n<p>\u5728\u9762\u8a66\u4e2d\uff0c\u4f60\u53ef\u80fd\u6703\u88ab\u8981\u6c42\u5c07\u4e00\u7d44\u6df7\u4e82\u7684\u898f\u683c\u9700\u6c42\u9032\u884c\u6b63\u898f\u5316\u3002\u4ee5\u4e0b\u662f\u61c9\u5c0d\u7684\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u7b2c\u4e00\u6b63\u898f\u5316\u5f62\u5f0f\uff081NF\uff09\uff1a<\/strong> \u78ba\u4fdd\u6bcf\u4e00\u6b04\u90fd\u5305\u542b\u539f\u5b50\u503c\uff0c\u4e0d\u5f97\u6709\u91cd\u8907\u7684\u7fa4\u7d44\uff0c\u6bcf\u4e00\u5217\u90fd\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u6b63\u898f\u5316\u5f62\u5f0f\uff082NF\uff09\uff1a<\/strong> \u6eff\u8db31NF\u7684\u8981\u6c42\uff0c\u4e26\u78ba\u4fdd\u6240\u6709\u975e\u9375\u5c6c\u6027\u90fd\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002\u79fb\u9664\u90e8\u5206\u4f9d\u8cf4\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff083NF\uff09\uff1a<\/strong> \u6eff\u8db32NF\u7684\u8981\u6c42\uff0c\u4e26\u79fb\u9664\u50b3\u905e\u4f9d\u8cf4\u3002\u975e\u9375\u5c6c\u6027\u4e0d\u61c9\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002<\/li>\n<\/ul>\n<p>\u8003\u616e\u4e00\u500b\u60c5\u5883\uff1a\u4f60\u6709\u4e00\u5f35\u55ae\u4e00\u8868\u683c\uff0c\u5305\u542b\u54e1\u5de5\u59d3\u540d\u3001\u90e8\u9580\u540d\u7a31\u8207\u90e8\u9580\u7d93\u7406\u3002\u82e5\u90e8\u9580\u7d93\u7406\u8b8a\u66f4\uff0c\u4f60\u5fc5\u9808\u66f4\u65b0\u8a72\u90e8\u9580\u7684\u6240\u6709\u8cc7\u6599\u5217\u3002\u9019\u9055\u53cd\u4e863NF\u3002\u4e00\u500b\u6b63\u78ba\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\u61c9\u5c07\u90e8\u9580\u5be6\u9ad4\u8207\u54e1\u5de5\u5be6\u9ad4\u5206\u958b\u3002<\/p>\n<h2>\u2753 \u5e38\u898b\u9762\u8a66\u554f\u984c\u8207\u8a73\u7d30\u89e3\u7b54<\/h2>\n<p>\u7df4\u7fd2\u7279\u5b9a\u554f\u984c\u80fd\u5e6b\u52a9\u4f60\u5728\u58d3\u529b\u4e0b\u6e05\u6670\u8868\u9054\u60f3\u6cd5\u3002\u4ee5\u4e0b\u70ba\u9ad8\u983b\u554f\u984c\u8207\u512a\u79c0\u56de\u7b54\u80cc\u5f8c\u7684\u908f\u8f2f\u3002<\/p>\n<h3>Q1\uff1a\u4f60\u5982\u4f55\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\uff1f<\/h3>\n<p><strong>\u56de\u7b54\u7b56\u7565\uff1a<\/strong> \u89e3\u91cb\u70ba\u4f55\u9700\u8981\u95dc\u806f\u8868\u683c\u3002<\/p>\n<ul>\n<li><strong> \u89e3\u91cb\uff1a<\/strong> \u8cc7\u6599\u5eab\u7cfb\u7d71\u901a\u5e38\u4e0d\u76f4\u63a5\u652f\u63f4\u591a\u5c0d\u591a\u95dc\u4fc2\u3002<\/li>\n<li><strong> \u89e3\u6c7a\u65b9\u6848\uff1a<\/strong> \u6211\u5f15\u5165\u4e00\u500b\u95dc\u806f\u5be6\u9ad4\uff0c\u901a\u5e38\u7a31\u70ba\u95dc\u806f\u8868\u683c\u6216\u6a4b\u63a5\u8868\u683c\u3002<\/li>\n<li><strong>\u5be6\u4f5c\uff1a<\/strong> \u6b64\u65b0\u8cc7\u6599\u8868\u5305\u542b\u5916\u9375\uff0c\u53c3\u8003\u5169\u500b\u76f8\u95dc\u5be6\u9ad4\u7684\u4e3b\u9375\u3002\u9019\u5c07 M:N \u7684\u95dc\u4fc2\u62c6\u89e3\u70ba\u5169\u500b\u4e00\u5c0d\u591a\u7684\u95dc\u4fc2\u3002<\/li>\n<li><strong>\u512a\u9ede\uff1a<\/strong> \u5b83\u5141\u8a31\u5728\u95dc\u4fc2\u672c\u8eab\u4e0a\u5132\u5b58\u984d\u5916\u7684\u5c6c\u6027\uff0c\u4f8b\u5982\u95dc\u4fc2\u4e2d\u7684\u300c\u52a0\u5165\u65e5\u671f\u300d\u6216\u300c\u89d2\u8272\u300d\u3002<\/li>\n<\/ul>\n<h3>Q2\uff1a\u4f55\u6642\u6703\u9078\u64c7\u4f7f\u7528\u4ee3\u7406\u9375\u800c\u975e\u81ea\u7136\u9375\uff1f<\/h3>\n<p><strong>\u56de\u7b54\u7b56\u7565\uff1a<\/strong> \u8a0e\u8ad6\u7a69\u5b9a\u6027\u3001\u6548\u80fd\u8207\u5f48\u6027\u3002<\/p>\n<ul>\n<li><strong>\u81ea\u7136\u9375\uff1a<\/strong> \u9019\u4e9b\u662f\u7531\u696d\u52d9\u5b9a\u7fa9\u7684\u8b58\u5225\u78bc\uff08\u4f8b\u5982\u793e\u6703\u5b89\u5168\u865f\u78bc\u3001\u96fb\u5b50\u90f5\u4ef6\uff09\u3002\u5b83\u5011\u53ef\u80fd\u8b8a\u66f4\u6216\u7121\u6cd5\u53d6\u5f97\u3002<\/li>\n<li><strong>\u4ee3\u7406\u9375\uff1a<\/strong> \u9019\u4e9b\u662f\u7531\u7cfb\u7d71\u7522\u751f\u7684\uff08\u4f8b\u5982\u81ea\u52d5\u905e\u589e\u7684\u6574\u6578\u6216 UUID\uff09\u3002<\/li>\n<li><strong>\u5efa\u8b70\uff1a<\/strong> \u6211\u5728\u5927\u591a\u6578\u4f01\u696d\u7cfb\u7d71\u4e2d\u504f\u597d\u4f7f\u7528\u4ee3\u7406\u9375\u4f5c\u70ba\u4e3b\u9375\u3002\u5373\u4f7f\u696d\u52d9\u8cc7\u6599\u8b8a\u66f4\uff0c\u5b83\u5011\u4e5f\u80fd\u78ba\u4fdd\u7a69\u5b9a\u6027\u3002\u6b64\u5916\uff0c\u7531\u65bc\u6574\u6578\u6bd4\u9577\u5b57\u4e32\u8655\u7406\u66f4\u5feb\uff0c\u5b83\u5011\u4e5f\u80fd\u512a\u5316\u9023\u63a5\u6548\u80fd\u3002<\/li>\n<\/ul>\n<h3>Q3\uff1a\u4f60\u5982\u4f55\u8655\u7406\u905e\u8ff4\u95dc\u4fc2\uff1f<\/h3>\n<p><strong>\u56de\u7b54\u7b56\u7565\uff1a<\/strong> \u89e3\u91cb\u968e\u5c64\u5f0f\u8cc7\u6599\u7d50\u69cb\u3002<\/p>\n<ul>\n<li><strong>\u5b9a\u7fa9\uff1a<\/strong> \u905e\u8ff4\u95dc\u4fc2\u767c\u751f\u5728\u5be6\u9ad4\u8207\u81ea\u8eab\u76f8\u95dc\u6642\u3002<\/li>\n<li><strong>\u7bc4\u4f8b\uff1a<\/strong> \u4e00\u500b\u54e1\u5de5\u5be6\u9ad4\uff0c\u5176\u4e2d\u4e00\u540d\u54e1\u5de5\u53ef\u4ee5\u7ba1\u7406\u5176\u4ed6\u54e1\u5de5\u3002<\/li>\n<li><strong>\u5be6\u4f5c\uff1a<\/strong> 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