{"id":191502,"date":"2024-11-12T16:57:23","date_gmt":"2024-11-12T08:57:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/191502\/"},"modified":"2024-11-12T16:57:24","modified_gmt":"2024-11-12T08:57:24","slug":"%e8%a9%b3%e8%a7%a3oracle%e4%b8%ad%e6%95%b8%e5%ad%97%e8%88%87%e5%a4%a7%e5%af%ab%e4%ba%a4%e6%8f%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/191502\/","title":{"rendered":"\u8a73\u89e3Oracle\u4e2d\u6578\u5b57\u8207\u5927\u5beb\u4ea4\u63db"},"content":{"rendered":"

\u8a73\u89e3Oracle\u4e2d\u6578\u5b57\u8207\u5927\u5beb\u4ea4\u63db<\/h1>\n

\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u4ea4\u63db\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5831\u8868\u3001\u6578\u64da\u8f38\u51fa\u6216\u7528\u6236\u754c\u9762\u6642\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728Oracle\u4e2d\u5be6\u73fe\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u4ea4\u63db\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u6982\u5ff5<\/h2>\n

\u5728Oracle\u4e2d\uff0c\u6578\u5b57\u901a\u5e38\u662f\u63070\u52309\u7684\u6578\u5b57\uff0c\u800c\u5927\u5beb\u5b57\u6bcd\u5247\u662f\u6307A\u5230Z\u7684\u5b57\u6bcd\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u76f8\u61c9\u7684\u5927\u5beb\u5b57\u6bcd\uff0c\u6216\u5c07\u5927\u5beb\u5b57\u6bcd\u8f49\u63db\u70ba\u6578\u5b57\u3002\u4f8b\u5982\uff0c\u5c071\u8f49\u63db\u70baA\uff0c2\u8f49\u63db\u70baB\uff0c\u4f9d\u6b64\u985e\u63a8\u3002<\/p>\n

\u6578\u5b57\u8f49\u63db\u70ba\u5927\u5beb\u5b57\u6bcd<\/h2>\n

\u8981\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5927\u5beb\u5b57\u6bcd\uff0c\u53ef\u4ee5\u4f7f\u7528Oracle\u7684ASCII\u51fd\u6578\u548cCHAR\u51fd\u6578\u3002ASCII\u51fd\u6578\u53ef\u4ee5\u7372\u53d6\u5b57\u7b26\u7684ASCII\u78bc\uff0c\u800cCHAR\u51fd\u6578\u5247\u53ef\u4ee5\u6839\u64daASCII\u78bc\u8fd4\u56de\u76f8\u61c9\u7684\u5b57\u7b26\u3002<\/p>\n

SELECT \n    num,\n    CHAR(num + 64) AS uppercase_letter\nFROM \n    (SELECT LEVEL AS num FROM dual CONNECT BY LEVEL <= 26);\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86LEVEL\u4f86\u751f\u62101\u523026\u7684\u6578\u5b57\uff0c\u7136\u5f8c\u5c07\u9019\u4e9b\u6578\u5b57\u8f49\u63db\u70ba\u5c0d\u61c9\u7684\u5927\u5beb\u5b57\u6bcd\u3002\u9019\u88e1\u768464\u662f\u56e0\u70baASCII\u78bc\u4e2d\uff0cA\u7684\u503c\u662f65\u3002<\/p>\n
\u5927\u5beb\u5b57\u6bcd\u8f49\u63db\u70ba\u6578\u5b57<\/h2>\n
\u76f8\u53cd\u5730\uff0c\u82e5\u8981\u5c07\u5927\u5beb\u5b57\u6bcd\u8f49\u63db\u70ba\u6578\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528ASCII\u51fd\u6578\u4f86\u7372\u53d6\u5b57\u6bcd\u7684ASCII\u78bc\uff0c\u7136\u5f8c\u9032\u884c\u76f8\u61c9\u7684\u8a08\u7b97\u3002<\/p>\n
SELECT \n    uppercase_letter,\n    ASCII(uppercase_letter) - 64 AS num\nFROM \n    (SELECT 'A' AS uppercase_letter FROM dual UNION ALL\n     SELECT 'B' FROM dual UNION ALL\n     SELECT 'C' FROM dual UNION ALL\n     SELECT 'D' FROM dual UNION ALL\n     SELECT 'E' FROM dual UNION ALL\n     SELECT 'F' FROM dual UNION ALL\n     SELECT 'G' FROM dual UNION ALL\n     SELECT 'H' FROM dual UNION ALL\n     SELECT 'I' FROM dual UNION ALL\n     SELECT 'J' FROM dual UNION ALL\n     SELECT 'K' FROM dual UNION ALL\n     SELECT 'L' FROM dual UNION ALL\n     SELECT 'M' FROM dual UNION ALL\n     SELECT 'N' FROM dual UNION ALL\n     SELECT 'O' FROM dual UNION ALL\n     SELECT 'P' FROM dual UNION ALL\n     SELECT 'Q' FROM dual UNION ALL\n     SELECT 'R' FROM dual UNION ALL\n     SELECT 'S' FROM dual UNION ALL\n     SELECT 'T' FROM dual UNION ALL\n     SELECT 'U' FROM dual UNION ALL\n     SELECT 'V' FROM dual UNION ALL\n     SELECT 'W' FROM dual UNION ALL\n     SELECT 'X' FROM dual UNION ALL\n     SELECT 'Y' FROM dual UNION ALL\n     SELECT 'Z' FROM dual);\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9078\u64c7\u4e86\u6240\u6709\u7684\u5927\u5beb\u5b57\u6bcd\uff0c\u4e26\u901a\u904eASCII\u51fd\u6578\u7372\u53d6\u5176ASCII\u78bc\uff0c\u7136\u5f8c\u6e1b\u53bb64\u4ee5\u7372\u5f97\u5c0d\u61c9\u7684\u6578\u5b57\u3002<\/p>\n
\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n
\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u4ea4\u63db\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u751f\u6210\u5831\u8868\u6642\uff0c\u53ef\u80fd\u9700\u8981\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u6bcd\u4ee5\u4fbf\u65bc\u95b1\u8b80\uff1b\u6216\u8005\u5728\u67d0\u4e9b\u52a0\u5bc6\u7b97\u6cd5\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u9032\u884c\u9019\u7a2e\u8f49\u63db\u4ee5\u589e\u52a0\u5b89\u5168\u6027\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Oracle\u4e2d\uff0c\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u4ea4\u63db\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684SQL\u67e5\u8a62\u4f86\u5be6\u73fe\u3002\u7121\u8ad6\u662f\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5927\u5beb\u5b57\u6bcd\uff0c\u9084\u662f\u5c07\u5927\u5beb\u5b57\u6bcd\u8f49\u63db\u70ba\u6578\u5b57\uff0cOracle\u90fd\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u51fd\u6578\u4f86\u652f\u6301\u9019\u4e9b\u64cd\u4f5c\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u9748\u6d3b\u6027\uff0c\u9084\u80fd\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u63d0\u4f9b\u66f4\u591a\u7684\u53ef\u80fd\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728Oracle\u4e2d\u9032\u884c\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u9999\u6e2fVPS<\/a>\u548c\u4e91\u670d\u52a1\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8a0eOracle\u4e2d\u6578\u5b57\u8207\u5927\u5beb\u5b57\u6bcd\u7684\u4ea4\u63db\u65b9\u6cd5\uff0c\u63d0\u4f9b\u5be6\u7528\u7bc4\u4f8b\u8207\u6280\u5de7\uff0c\u52a9\u60a8\u8f15\u9b06\u638c\u63e1\u6578\u64da\u8655\u7406\u3002<\/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-191502","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191502","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=191502"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191502\/revisions"}],"predecessor-version":[{"id":191503,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191502\/revisions\/191503"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=191502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=191502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=191502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}