{"id":199985,"date":"2025-05-06T11:42:46","date_gmt":"2025-05-06T03:42:46","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199985\/"},"modified":"2025-05-06T11:42:46","modified_gmt":"2025-05-06T03:42:46","slug":"%e4%bd%bf%e7%94%a8oracle-sql%e8%bf%9b%e8%a1%8c%e9%99%a4%e6%b3%95%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199985\/","title":{"rendered":"\u4f7f\u7528Oracle SQL\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c"},"content":{"rendered":"

<\/b> <\/p>\n

\u4f7f\u7528Oracle SQL\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c<\/h1>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u4e3b\u8981\u8bb2\u89e3\u4e86\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e3b\u673a\u5b9d\u8d1d\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

\u300aOracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u7684\u7528\u6cd5\u300b<\/p>\n

\u5728Oracle SQL\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u662f\u5e38\u89c1\u7684\u6570\u5b66\u8fd0\u7b97\u4e4b\u4e00\u3002\u5728\u6570\u636e\u67e5\u8be2\u548c\u5904\u7406\u8fc7\u7a0b\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u8ba1\u7b97\u5b57\u6bb5\u4e4b\u95f4\u7684\u6bd4\u4f8b\u6216\u8005\u5f97\u51fa\u7279\u5b9a\u6570\u503c\u7684\u903b\u8f91\u5173\u7cfb\u3002\u672c\u6587\u5c06\u4ecb\u7ecdOracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u7684\u7528\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001Oracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u7684\u4e24\u79cd\u65b9\u5f0f<\/p>\n

\u5728Oracle SQL\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u8fdb\u884c\uff0c\u5206\u522b\u4e3a\u76f4\u63a5\u9664\u6cd5\u548c\u9664\u6cd5\u51fd\u6570\u7684\u65b9\u5f0f\u3002<\/p>\n

    \n
  1. \u76f4\u63a5\u9664\u6cd5\uff1a\u76f4\u63a5\u4f7f\u7528\u201c\/\u201d\u7b26\u53f7\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff0c\u5c06\u4e24\u4e2a\u6570\u76f8\u9664\u5f97\u5230\u7ed3\u679c\u3002<\/li>\n<\/ol>\n

    \u4f8b\u5982\uff0c\u8ba1\u7b97\u5b57\u6bb5a\u9664\u4ee5\u5b57\u6bb5b\u7684\u503c\uff1a<\/p>\n

    SELECT a \/ b AS result\nFROM table_name;<\/pre>\n
      \n
    1. \u9664\u6cd5\u51fd\u6570\uff1aOracle SQL\u4e2d\u63d0\u4f9b\u4e86DIV\u548c\/\u4e24\u79cd\u9664\u6cd5\u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6574\u6570\u7684\u9664\u6cd5\u8fd0\u7b97\u3002<\/li>\n<\/ol>\n
        \n
      • DIV\u51fd\u6570\uff1a\u8fd4\u56de\u9664\u6cd5\u8fd0\u7b97\u7684\u6574\u6570\u90e8\u5206\uff0c\u5ffd\u7565\u5c0f\u6570\u90e8\u5206\u3002<\/li>\n<\/ul>\n
        \u4f8b\u5982\uff0c\u8ba1\u7b97\u5b57\u6bb5a\u9664\u4ee5\u5b57\u6bb5b\u7684\u6574\u6570\u90e8\u5206\uff1a<\/p>\n
        SELECT a DIV b AS result\nFROM table_name;<\/pre>\n
          \n
        • \/\u51fd\u6570\uff1a\u8fd4\u56de\u9664\u6cd5\u8fd0\u7b97\u7684\u7cbe\u786e\u7ed3\u679c\uff0c\u5305\u62ec\u5c0f\u6570\u90e8\u5206\u3002<\/li>\n<\/ul>\n
          \u4f8b\u5982\uff0c\u8ba1\u7b97\u5b57\u6bb5a\u9664\u4ee5\u5b57\u6bb5b\u7684\u7cbe\u786e\u7ed3\u679c\uff1a<\/p>\n
          SELECT a \/ b AS result\nFROM table_name;<\/pre>\n
          \u4e8c\u3001Oracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u793a\u4f8b<\/p>\n
          \u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3a\u201cstudents\u201d\u7684\u8868\uff0c\u5305\u542b\u5b66\u751f\u7684\u5b66\u53f7\uff08id\uff09\u3001\u59d3\u540d\uff08name\uff09\u3001\u6570\u5b66\u6210\u7ee9\uff08math\uff09\u548c\u82f1\u8bed\u6210\u7ee9\uff08english\uff09\u3002\u6211\u4eec\u5c06\u4f7f\u7528\u8fd9\u4e2a\u8868\u4f5c\u4e3a\u793a\u4f8b\u6765\u6f14\u793aOracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u7684\u7528\u6cd5\u3002<\/p>\n
            \n
          1. \n
            \u76f4\u63a5\u9664\u6cd5\u793a\u4f8b\uff1a<\/p>\n
            SELECT name, math, english, math \/ english AS math_english_ratio\nFROM students;<\/pre>\n<\/li>\n<\/ol>\n
            \u8fd0\u884c\u4ee5\u4e0aSQL\u8bed\u53e5\uff0c\u5c06\u4f1a\u5f97\u5230\u6bcf\u4f4d\u5b66\u751f\u7684\u6570\u5b66\u6210\u7ee9\u548c\u82f1\u8bed\u6210\u7ee9\u7684\u6bd4\u503c\u3002<\/p>\n
              \n
            1. \n
              \u9664\u6cd5\u51fd\u6570\u793a\u4f8b\uff1a<\/p>\n
              SELECT name, math, english, math DIV english AS math_english_integer_ratio,\nmath \/ english AS math_english_exact_ratio\nFROM students;<\/pre>\n<\/li>\n<\/ol>\n
              \u8fd0\u884c\u4ee5\u4e0aSQL\u8bed\u53e5\uff0c\u5c06\u4f1a\u5f97\u5230\u6bcf\u4f4d\u5b66\u751f\u7684\u6570\u5b66\u6210\u7ee9\u548c\u82f1\u8bed\u6210\u7ee9\u7684\u6574\u6570\u6bd4\u503c\u548c\u7cbe\u786e\u6bd4\u503c\u3002<\/p>\n
              \u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5728Oracle SQL\u4e2d\u5982\u4f55\u4f7f\u7528\u9664\u6cd5\u8fd0\u7b97\u8fdb\u884c\u6570\u503c\u8ba1\u7b97\uff0c\u5e76\u5f97\u5230\u6211\u4eec\u9700\u8981\u7684\u7ed3\u679c\u3002\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u662f\u4e00\u4e2a\u975e\u5e38\u5e38\u7528\u7684\u8fd0\u7b97\u65b9\u5f0f\uff0c\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u5730\u5206\u6790\u548c\u5904\u7406\u6570\u636e\u3002<\/p>\n
              \u6587\u4e2d\u5173\u4e8eOracle,SQL,\u9664\u6cd5\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4f7f\u7528Oracle SQL\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
              \n
              \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
              \u4f7f\u7528Oracle SQL\u8fdb\u884c\u9664\u6cd5...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199985","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199985","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199985"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199985\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}