{"id":143777,"date":"2024-11-01T01:09:17","date_gmt":"2024-10-31T17:09:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143777\/"},"modified":"2024-11-01T01:09:18","modified_gmt":"2024-10-31T17:09:18","slug":"sql-%e5%a4%a7%e8%b3%bd-5x5-%e6%96%b9%e6%a0%bc%e6%a3%8b%e7%9b%a4%e9%9b%a3%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143777\/","title":{"rendered":"SQL \u5927\u8cfd\u2014\u20145X5 \u65b9\u683c\u68cb\u76e4\u96e3\u984c"},"content":{"rendered":"

SQL \u5927\u8cfd\u2014\u20145X5 \u65b9\u683c\u68cb\u76e4\u96e3\u984c<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u548c\u67e5\u8a62\u8a9e\u8a00\u7684\u4e16\u754c\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u4e0d\u50c5\u662f\u7528\u65bc\u6578\u64da\u64cd\u4f5c\u7684\u5de5\u5177\uff0c\u9084\u53ef\u4ee5\u7528\u4f86\u89e3\u6c7a\u5404\u7a2e\u908f\u8f2f\u548c\u6578\u5b78\u554f\u984c\u3002\u5176\u4e2d\uff0c5X5\u65b9\u683c\u68cb\u76e4\u96e3\u984c\u662f\u4e00\u500b\u6709\u8da3\u7684\u6311\u6230\uff0c\u6d89\u53ca\u5230\u5982\u4f55\u5728\u4e00\u500b5\u884c5\u5217\u7684\u68cb\u76e4\u4e0a\u653e\u7f6e\u68cb\u5b50\uff0c\u4e26\u6eff\u8db3\u7279\u5b9a\u7684\u689d\u4ef6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e00\u554f\u984c\u7684\u80cc\u666f\u3001\u89e3\u984c\u601d\u8def\u53ca\u5176\u5728SQL\u4e2d\u7684\u5be6\u73fe\u3002<\/p>\n

\u554f\u984c\u80cc\u666f<\/h2>\n

5X5\u65b9\u683c\u68cb\u76e4\u96e3\u984c\u7684\u57fa\u672c\u8981\u6c42\u662f\uff0c\u5728\u4e00\u500b5\u884c5\u5217\u7684\u68cb\u76e4\u4e0a\u653e\u7f6e\u68cb\u5b50\uff0c\u4f7f\u5f97\u6bcf\u884c\u3001\u6bcf\u5217\u53ca\u6bcf\u500b\u5c0d\u89d2\u7dda\u4e0a\u90fd\u6070\u597d\u6709\u4e00\u500b\u68cb\u5b50\u3002\u9019\u500b\u554f\u984c\u53ef\u4ee5\u8996\u70ba\u4e00\u500b\u6392\u5217\u7d44\u5408\u7684\u554f\u984c\uff0c\u4e26\u4e14\u53ef\u4ee5\u7528\u6578\u5b78\u548c\u908f\u8f2f\u63a8\u7406\u4f86\u89e3\u6c7a\u3002\u9019\u985e\u554f\u984c\u5728\u8a08\u7b97\u6a5f\u79d1\u5b78\u4e2d\u6709\u8457\u5ee3\u6cdb\u7684\u61c9\u7528\uff0c\u7279\u5225\u662f\u5728\u512a\u5316\u548c\u641c\u7d22\u7b97\u6cd5\u4e2d\u3002<\/p>\n

\u89e3\u984c\u601d\u8def<\/h2>\n

\u89e3\u6c7a5X5\u65b9\u683c\u68cb\u76e4\u96e3\u984c\u7684\u57fa\u672c\u601d\u8def\u662f\u4f7f\u7528\u56de\u6eaf\u6cd5\uff08Backtracking\uff09\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u904e\u9010\u6b65\u69cb\u5efa\u89e3\u6c7a\u65b9\u6848\uff0c\u4e26\u5728\u767c\u73fe\u7576\u524d\u89e3\u7121\u6cd5\u6eff\u8db3\u689d\u4ef6\u6642\uff0c\u56de\u9000\u5230\u4e0a\u4e00\u6b65\u9032\u884c\u8abf\u6574\u3002\u5177\u9ad4\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u5f9e\u68cb\u76e4\u7684\u7b2c\u4e00\u884c\u958b\u59cb\uff0c\u5617\u8a66\u5728\u6bcf\u4e00\u5217\u653e\u7f6e\u68cb\u5b50\u3002<\/li>\n
  2. \u6aa2\u67e5\u7576\u524d\u653e\u7f6e\u662f\u5426\u7b26\u5408\u689d\u4ef6\uff08\u5373\u6bcf\u884c\u3001\u6bcf\u5217\u53ca\u5c0d\u89d2\u7dda\u4e0a\u53ea\u80fd\u6709\u4e00\u500b\u68cb\u5b50\uff09\u3002<\/li>\n
  3. \u5982\u679c\u7b26\u5408\u689d\u4ef6\uff0c\u5247\u7e7c\u7e8c\u5230\u4e0b\u4e00\u884c\uff1b\u5982\u679c\u4e0d\u7b26\u5408\uff0c\u5247\u56de\u9000\u4e26\u5617\u8a66\u4e0b\u4e00\u5217\u3002<\/li>\n
  4. \u91cd\u8907\u4ee5\u4e0a\u6b65\u9a5f\uff0c\u76f4\u5230\u6240\u6709\u884c\u90fd\u653e\u7f6e\u5b8c\u7562\u6216\u7121\u6cd5\u653e\u7f6e\u70ba\u6b62\u3002<\/li>\n<\/ol>\n

    SQL \u5be6\u73fe<\/h2>\n

    \u5728SQL\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u905e\u6b78\u67e5\u8a62\u4f86\u6a21\u64ec\u9019\u4e00\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684SQL\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u57285X5\u68cb\u76e4\u4e0a\u653e\u7f6e\u68cb\u5b50\uff1a<\/p>\n

    \nWITH RECURSIVE PlaceChess AS (\n    SELECT 1 AS row, 1 AS col, ARRAY[1] AS positions\n    UNION ALL\n    SELECT \n        CASE WHEN col < 5 THEN row ELSE row + 1 END,\n        CASE WHEN col < 5 THEN col + 1 ELSE 1 END,\n        positions || (CASE WHEN col < 5 THEN col + 1 ELSE 0 END)\n    FROM PlaceChess\n    WHERE row <= 5\n)\nSELECT * FROM PlaceChess WHERE row = 5;\n<\/code><\/pre>\n
    \u4e0a\u8ff0\u67e5\u8a62\u4f7f\u7528\u4e86\u905e\u6b78CTE\uff08\u516c\u7528\u8868\u9054\u5f0f\uff09\u4f86\u751f\u6210\u68cb\u76e4\u7684\u6240\u6709\u53ef\u80fd\u653e\u7f6e\u65b9\u5f0f\u3002\u901a\u904e\u6aa2\u67e5\u6bcf\u4e00\u884c\u548c\u6bcf\u4e00\u5217\u7684\u653e\u7f6e\u60c5\u6cc1\uff0c\u6211\u5011\u53ef\u4ee5\u627e\u5230\u7b26\u5408\u689d\u4ef6\u7684\u89e3\u3002<\/p>\n
    \u5be6\u969b\u61c9\u7528<\/h2>\n
    5X5\u65b9\u683c\u68cb\u76e4\u96e3\u984c\u4e0d\u50c5\u662f\u4e00\u500b\u6709\u8da3\u7684\u6578\u5b78\u554f\u984c\uff0c\u9084\u53ef\u4ee5\u61c9\u7528\u65bc\u591a\u7a2e\u5be6\u969b\u5834\u666f\u3002\u4f8b\u5982\uff0c\u5728\u8cc7\u6e90\u5206\u914d\u3001\u6392\u7a0b\u554f\u984c\u548c\u512a\u5316\u7b97\u6cd5\u4e2d\uff0c\u985e\u4f3c\u7684\u908f\u8f2f\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u627e\u5230\u6700\u4f73\u89e3\u6c7a\u65b9\u6848\u3002\u6b64\u5916\uff0c\u9019\u985e\u554f\u984c\u7684\u89e3\u6c7a\u904e\u7a0b\u4e5f\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u63d0\u9ad8\u4ed6\u5011\u7684SQL\u67e5\u8a62\u80fd\u529b\uff0c\u589e\u5f37\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u7406\u89e3\u3002<\/p>\n
    \u7e3d\u7d50<\/h2>\n
    5X5\u65b9\u683c\u68cb\u76e4\u96e3\u984c\u662f\u4e00\u500b\u7d50\u5408\u4e86\u6578\u5b78\u3001\u908f\u8f2f\u548c\u8a08\u7b97\u6a5f\u79d1\u5b78\u7684\u6709\u8da3\u6311\u6230\u3002\u901a\u904e\u4f7f\u7528\u56de\u6eaf\u6cd5\u548cSQL\u7684\u905e\u6b78\u67e5\u8a62\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u9019\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u6211\u5011\u7684\u7de8\u7a0b\u6280\u80fd\uff0c\u9084\u80fd\u589e\u5f37\u6211\u5011\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u7406\u89e3\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u9ad8\u6548\u904b\u884c\u67e5\u8a62\u6709\u8208\u8da3\uff0c\u6216\u662f\u9700\u8981\u66f4\u5f37\u5927\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u9805\u76ee\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u53c3\u52a0 SQL \u5927\u8cfd\uff0c\u6311\u6230 5X5 \u65b9\u683c\u68cb\u76e4\u96e3\u984c\uff0c\u6e2c\u8a66\u4f60\u7684\u6578\u64da\u5eab\u67e5\u8a62\u6280\u5de7\uff0c\u8d0f\u53d6\u69ae\u8b7d\u8207\u734e\u54c1\uff01<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-143777","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=143777"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143777\/revisions"}],"predecessor-version":[{"id":143778,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143777\/revisions\/143778"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}