{"id":95806,"date":"2024-10-20T04:09:17","date_gmt":"2024-10-19T20:09:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95806\/"},"modified":"2024-10-20T04:09:18","modified_gmt":"2024-10-19T20:09:18","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%99%82%e9%96%93%e6%af%94%e8%bc%83%e5%b0%8f%e6%8a%80%e5%b7%a7-oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e9%97%9c%e6%96%bc%e6%99%82%e9%96%93%e7%9a%84%e6%af%94%e8%bc%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95806\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u6642\u9593\u6bd4\u8f03\u5c0f\u6280\u5de7 (oracle\u6578\u64da\u5eab\u95dc\u65bc\u6642\u9593\u7684\u6bd4\u8f03)"},"content":{"rendered":"

Oracle\u6578\u64da\u5eab\u6642\u9593\u6bd4\u8f03\u5c0f\u6280\u5de7<\/h1>\n

\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u6642\u9593\u7684\u6bd4\u8f03\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u6642\u9593\u6233\u3001\u65e5\u671f\u548c\u6642\u9593\u9593\u9694\u6642\u3002\u6b63\u78ba\u5730\u6bd4\u8f03\u6642\u9593\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u5728Oracle\u6578\u64da\u5eab\u4e2d\u9032\u884c\u6642\u9593\u6bd4\u8f03\u7684\u5c0f\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u6642\u9593\u6578\u64da\u3002<\/p>\n

1. \u4f7f\u7528TO_DATE\u548cTO_TIMESTAMP\u51fd\u6578<\/h2>\n

\u5728Oracle\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u683c\u5f0f\u5316\u975e\u5e38\u91cd\u8981\u3002\u4f7f\u7528TO_DATE<\/code>\u548cTO_TIMESTAMP<\/code>\u51fd\u6578\u53ef\u4ee5\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u6216\u6642\u9593\u6233\uff0c\u9019\u5c0d\u65bc\u6bd4\u8f03\u64cd\u4f5c\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n

SELECT *\nFROM your_table\nWHERE your_date_column > TO_DATE('2023-01-01', 'YYYY-MM-DD');\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u5b57\u7b26\u4e32’2023-01-01’\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\uff0c\u7136\u5f8c\u8207\u6578\u64da\u8868\u4e2d\u7684\u65e5\u671f\u5217\u9032\u884c\u6bd4\u8f03\u3002<\/p>\n
2. \u4f7f\u7528SYSDATE\u548cSYSTIMESTAMP<\/h2>\n
Oracle\u63d0\u4f9b\u4e86SYSDATE<\/code>\u548cSYSTIMESTAMP<\/code>\u51fd\u6578\u4f86\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u9019\u4e9b\u51fd\u6578\u5728\u9032\u884c\u6642\u9593\u6bd4\u8f03\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n
SELECT *\nFROM your_table\nWHERE your_date_column > SYSDATE - INTERVAL '1' DAY;\n<\/code><\/pre>\n
\u4e0a\u8ff0\u67e5\u8a62\u5c07\u8fd4\u56de\u904e\u53bb24\u5c0f\u6642\u5167\u7684\u6240\u6709\u8a18\u9304\u3002\u4f7f\u7528INTERVAL<\/code>\u95dc\u9375\u5b57\u53ef\u4ee5\u65b9\u4fbf\u5730\u9032\u884c\u6642\u9593\u7684\u52a0\u6e1b\u3002<\/p>\n
3. \u4f7f\u7528EXTRACT\u51fd\u6578<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u53ea\u9700\u8981\u6bd4\u8f03\u65e5\u671f\u7684\u67d0\u4e00\u90e8\u5206\uff0c\u4f8b\u5982\u5e74\u4efd\u6216\u6708\u4efd\u3002EXTRACT<\/code>\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u60a8\u63d0\u53d6\u65e5\u671f\u7684\u7279\u5b9a\u90e8\u5206\u3002<\/p>\n
SELECT *\nFROM your_table\nWHERE EXTRACT(YEAR FROM your_date_column) = 2023;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u4efd\u70ba2023\u7684\u8a18\u9304\uff0c\u9019\u5728\u9032\u884c\u5e74\u5ea6\u5831\u544a\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n
4. \u4f7f\u7528BETWEEN\u9032\u884c\u7bc4\u570d\u6bd4\u8f03<\/h2>\n
\u5982\u679c\u60a8\u9700\u8981\u6bd4\u8f03\u4e00\u500b\u65e5\u671f\u7bc4\u570d\uff0c\u53ef\u4ee5\u4f7f\u7528BETWEEN<\/code>\u95dc\u9375\u5b57\u3002\u9019\u6a23\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u8a9e\u53e5\uff0c\u8b93\u5176\u66f4\u5177\u53ef\u8b80\u6027\u3002<\/p>\n
SELECT *\nFROM your_table\nWHERE your_date_column BETWEEN TO_DATE('2023-01-01', 'YYYY-MM-DD') AND TO_DATE('2023-12-31', 'YYYY-MM-DD');\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de2023\u5e74\u5167\u7684\u6240\u6709\u8a18\u9304\uff0c\u4f7f\u7528BETWEEN<\/code>\u53ef\u4ee5\u8b93\u7bc4\u570d\u6bd4\u8f03\u8b8a\u5f97\u66f4\u52a0\u76f4\u89c0\u3002<\/p>\n
5. \u6ce8\u610f\u6642\u5340\u7684\u5f71\u97ff<\/h2>\n
\u5728\u8655\u7406\u6642\u9593\u6578\u64da\u6642\uff0c\u6642\u5340\u662f\u4e00\u500b\u4e0d\u53ef\u5ffd\u8996\u7684\u56e0\u7d20\u3002Oracle\u63d0\u4f9b\u4e86FROM_TZ<\/code>\u548cAT TIME ZONE<\/code>\u7b49\u51fd\u6578\u4f86\u8655\u7406\u6642\u5340\u554f\u984c\u3002<\/p>\n
SELECT *\nFROM your_table\nWHERE your_timestamp_column AT TIME ZONE 'UTC' > SYSTIMESTAMP AT TIME ZONE 'Asia\/Hong_Kong';\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u6bd4\u8f03UTC\u6642\u9593\u548c\u9999\u6e2f\u6642\u9593\uff0c\u78ba\u4fdd\u5728\u4e0d\u540c\u6642\u5340\u4e0b\u7684\u6b63\u78ba\u6bd4\u8f03\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u6b63\u78ba\u5730\u6bd4\u8f03\u6642\u9593\u662f\u6578\u64da\u8655\u7406\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u74b0\u7bc0\u3002\u901a\u904e\u4f7f\u7528TO_DATE<\/code>\u3001SYSDATE<\/code>\u3001EXTRACT<\/code>\u3001BETWEEN<\/code>\u7b49\u51fd\u6578\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u9032\u884c\u6642\u9593\u6bd4\u8f03\u3002\u6b64\u5916\uff0c\u8003\u616e\u5230\u6642\u5340\u7684\u5f71\u97ff\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u9019\u4e9b\u5c0f\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684Oracle\u6578\u64da\u5eab\u904b\u884c\uff0c\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u914d\u7f6e\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u638c\u63e1Oracle\u6578\u64da\u5eab\u4e2d\u6642\u9593\u6bd4\u8f03\u7684\u5c0f\u6280\u5de7\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u8655\u7406\uff0c\u8b93\u6642\u9593\u7ba1\u7406\u66f4\u7cbe\u6e96\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-95806","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95806","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=95806"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95806\/revisions"}],"predecessor-version":[{"id":95807,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95806\/revisions\/95807"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}