{"id":94862,"date":"2024-10-19T20:50:18","date_gmt":"2024-10-19T12:50:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94862\/"},"modified":"2024-10-19T20:50:18","modified_gmt":"2024-10-19T12:50:18","slug":"oracle%e6%9f%a5%e8%a9%a2%e9%80%a3%e7%ba%8c5%e5%80%8b%e6%9c%88%e8%a8%98%e9%8c%84%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94862\/","title":{"rendered":"Oracle\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5"},"content":{"rendered":"

Oracle\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u5167\u7684\u8a18\u9304\u662f\u4e00\u9805\u5e38\u898b\u7684\u9700\u6c42\u3002\u5c0d\u65bc\u4f7f\u7528Oracle\u6578\u64da\u5eab\u7684\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u4f86\u8aaa\uff0c\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u7684\u8a18\u9304\u53ef\u4ee5\u5e6b\u52a9\u4ed6\u5011\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u8da8\u52e2\u548c\u6a21\u5f0f\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728Oracle\u4e2d\u5be6\u73fe\u9019\u4e00\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684SQL\u7bc4\u4f8b\u3002<\/p>\n

\u7406\u89e3\u6642\u9593\u7bc4\u570d\u67e5\u8a62<\/h2>\n

\u5728\u9032\u884c\u6642\u9593\u7bc4\u570d\u67e5\u8a62\u6642\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u67e5\u8a62\u7684\u8d77\u59cb\u65e5\u671f\u548c\u7d50\u675f\u65e5\u671f\u3002\u5c0d\u65bc\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u7684\u8a18\u9304\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528Oracle\u7684\u65e5\u671f\u51fd\u6578\u4f86\u8a08\u7b97\u9019\u4e9b\u65e5\u671f\u3002\u901a\u5e38\uff0c\u6211\u5011\u6703\u4f7f\u7528SYSDATE\u4f86\u7372\u53d6\u7576\u524d\u65e5\u671f\uff0c\u7136\u5f8c\u6839\u64da\u9700\u8981\u5411\u524d\u63a8\u7b975\u500b\u6708\u3002<\/p>\n

SQL\u67e5\u8a62\u7bc4\u4f8b<\/h2>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684SQL\u67e5\u8a62\u7bc4\u4f8b\uff0c\u8a72\u67e5\u8a62\u5c07\u5f9e\u4e00\u500b\u540d\u70basales<\/code>\u7684\u8868\u4e2d\u9078\u53d6\u6700\u8fd15\u500b\u6708\u7684\u92b7\u552e\u8a18\u9304\u3002\u5047\u8a2d\u8a72\u8868\u4e2d\u6709\u4e00\u500b\u540d\u70basale_date<\/code>\u7684\u65e5\u671f\u5b57\u6bb5\u3002<\/p>\n

\nSELECT *\nFROM sales\nWHERE sale_date >= ADD_MONTHS(TRUNC(SYSDATE, 'MM'), -5)\n  AND sale_date < TRUNC(SYSDATE, 'MM');\n<\/code><\/pre>\n
\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0cADD_MONTHS<\/code>\u51fd\u6578\u7528\u65bc\u8a08\u7b975\u500b\u6708\u524d\u7684\u7b2c\u4e00\u5929\uff0c\u800cTRUNC(SYSDATE, 'MM')<\/code>\u5247\u7528\u65bc\u7372\u53d6\u7576\u524d\u6708\u4efd\u7684\u7b2c\u4e00\u5929\u3002\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u7372\u53d6\u5f9e5\u500b\u6708\u524d\u7684\u7b2c\u4e00\u5929\u5230\u7576\u524d\u6708\u4efd\u7684\u7b2c\u4e00\u5929\u4e4b\u9593\u7684\u6240\u6709\u8a18\u9304\u3002<\/p>\n
\u9032\u4e00\u6b65\u7684\u67e5\u8a62\u512a\u5316<\/h2>\n
\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5c0d\u67e5\u8a62\u9032\u884c\u9032\u4e00\u6b65\u7684\u512a\u5316\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u53ea\u5c0d\u67d0\u4e9b\u7279\u5b9a\u7684\u5b57\u6bb5\u611f\u8208\u8da3\uff0c\u53ef\u4ee5\u9078\u64c7\u6027\u5730\u9078\u53d6\u9019\u4e9b\u5b57\u6bb5\uff0c\u800c\u4e0d\u662f\u4f7f\u7528*<\/code>\u4f86\u9078\u53d6\u6240\u6709\u5b57\u6bb5\u3002<\/p>\n
\nSELECT product_id, SUM(amount) AS total_sales\nFROM sales\nWHERE sale_date >= ADD_MONTHS(TRUNC(SYSDATE, 'MM'), -5)\n  AND sale_date < TRUNC(SYSDATE, 'MM')\nGROUP BY product_id\nORDER BY total_sales DESC;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u7522\u54c1\u5728\u6700\u8fd15\u500b\u6708\u5167\u7684\u7e3d\u92b7\u552e\u984d\uff0c\u4e26\u6309\u92b7\u552e\u984d\u964d\u5e8f\u6392\u5217\u3002\u9019\u6a23\u7684\u67e5\u8a62\u4e0d\u50c5\u80fd\u5920\u63d0\u4f9b\u6709\u50f9\u503c\u7684\u6578\u64da\uff0c\u9084\u80fd\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n
\u8655\u7406\u4e0d\u540c\u7684\u65e5\u671f\u683c\u5f0f<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u5eab\u4e2d\u7684\u65e5\u671f\u683c\u5f0f\u53ef\u80fd\u8207\u6211\u5011\u7684\u67e5\u8a62\u4e0d\u4e00\u81f4\u3002\u70ba\u4e86\u78ba\u4fdd\u67e5\u8a62\u7684\u6b63\u78ba\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528TO_DATE<\/code>\u51fd\u6578\u4f86\u8f49\u63db\u65e5\u671f\u683c\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n
\nSELECT *\nFROM sales\nWHERE sale_date >= TO_DATE('2023-01-01', 'YYYY-MM-DD')\n  AND sale_date < TO_DATE('2023-06-01', 'YYYY-MM-DD');\n<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5373\u4f7f\u5728\u4e0d\u540c\u7684\u65e5\u671f\u683c\u5f0f\u4e0b\uff0c\u67e5\u8a62\u4e5f\u80fd\u6b63\u5e38\u904b\u884c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u7684\u8a18\u9304\u5728Oracle\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u901a\u904e\u4f7f\u7528\u65e5\u671f\u51fd\u6578\u548c\u9069\u7576\u7684SQL\u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u9032\u884c\u92b7\u552e\u5206\u6790\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\u5206\u6790\uff0c\u638c\u63e1\u9019\u4e9b\u67e5\u8a62\u6280\u5de7\u90fd\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u9078\u64c7\u5408\u9069\u7684\u4e91\u4f3a\u670d\u5668<\/a>\u90fd\u80fd\u70ba\u60a8\u7684\u696d\u52d9\u5e36\u4f86\u66f4\u5927\u7684\u9748\u6d3b\u6027\u548c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22Oracle\u67e5\u8a62\u9023\u7e8c5\u500b\u6708\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5\uff0c\u638c\u63e1\u6578\u64da\u5206\u6790\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-94862","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94862","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=94862"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94862\/revisions"}],"predecessor-version":[{"id":94868,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94862\/revisions\/94868"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}