{"id":95338,"date":"2024-10-20T00:13:18","date_gmt":"2024-10-19T16:13:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95338\/"},"modified":"2024-10-20T00:13:19","modified_gmt":"2024-10-19T16:13:19","slug":"oracle%e6%99%82%e9%96%93%e8%88%87%e6%97%a5%e6%9c%9f%e7%9a%84%e7%9b%b8%e9%97%9c%e6%93%8d%e4%bd%9c%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95338\/","title":{"rendered":"Oracle\u6642\u9593\u8207\u65e5\u671f\u7684\u76f8\u95dc\u64cd\u4f5c\u5be6\u4f8b"},"content":{"rendered":"<h1 id=\"oracle%e6%99%82%e9%96%93%e8%88%87%e6%97%a5%e6%9c%9f%e7%9a%84%e7%9b%b8%e9%97%9c%e6%93%8d%e4%bd%9c%e5%af%a6%e4%be%8b-kcjRugFPTp\">Oracle\u6642\u9593\u8207\u65e5\u671f\u7684\u76f8\u95dc\u64cd\u4f5c\u5be6\u4f8b<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u6642\u9593\u8207\u65e5\u671f\u7684\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u8655\u7406\u6642\u9593\u548c\u65e5\u671f\uff0c\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6578\u64da\u67e5\u8a62\uff0c\u9084\u80fd\u5920\u9032\u884c\u6578\u64da\u7684\u8a08\u7b97\u548c\u683c\u5f0f\u5316\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u5e38\u898b\u7684Oracle\u6642\u9593\u8207\u65e5\u671f\u64cd\u4f5c\u7684\u5be6\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728Oracle\u4e2d\u9032\u884c\u9019\u4e9b\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"1-oracle%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-kcjRugFPTp\">1. Oracle\u4e2d\u7684\u65e5\u671f\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u4e3b\u8981\u6709\u5169\u7a2e\u65e5\u671f\u6578\u64da\u985e\u578b\uff1a<code>DATE<\/code>\u548c<code>TIMESTAMP<\/code>\u3002<\/p>\n<ul>\n<li><code>DATE<\/code>\uff1a\u6b64\u6578\u64da\u985e\u578b\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u78ba\u5230\u79d2\u3002\u5b83\u7684\u683c\u5f0f\u70ba\uff1aYYYY-MM-DD HH24:MI:SS\u3002<\/li>\n<li><code>TIMESTAMP<\/code>\uff1a\u6b64\u6578\u64da\u985e\u578b\u9664\u4e86\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\u5916\uff0c\u9084\u53ef\u4ee5\u5b58\u5132\u5c0f\u6578\u79d2\uff0c\u7cbe\u78ba\u5ea6\u53ef\u9054\u5230\u5fae\u79d2\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e7%8d%b2%e5%8f%96%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93-kcjRugFPTp\">2. \u7372\u53d6\u7576\u524d\u65e5\u671f\u548c\u6642\u9593<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>SYSDATE<\/code>\u51fd\u6578\u4f86\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528<code>SYSDATE<\/code>\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT SYSDATE FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u7684\u7cfb\u7d71\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<h2 id=\"3-%e6%97%a5%e6%9c%9f%e6%a0%bc%e5%bc%8f%e5%8c%96-kcjRugFPTp\">3. \u65e5\u671f\u683c\u5f0f\u5316<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86<code>TO_CHAR<\/code>\u51fd\u6578\u4f86\u683c\u5f0f\u5316\u65e5\u671f\u3002\u4ee5\u4e0b\u662f\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u4e0d\u540c\u683c\u5f0f\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT TO_CHAR(SYSDATE, 'YYYY-MM-DD') AS formatted_date FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u65e5\u671f\u7684\u683c\u5f0f\u5316\u7d50\u679c\uff0c\u4f8b\u5982\uff1a2023-10-01\u3002<\/p>\n<h2 id=\"4-%e6%97%a5%e6%9c%9f%e8%a8%88%e7%ae%97-kcjRugFPTp\">4. \u65e5\u671f\u8a08\u7b97<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684\u52a0\u6e1b\u6cd5\u4f86\u9032\u884c\u65e5\u671f\u8a08\u7b97\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u7372\u53d6\u672a\u4f867\u5929\u7684\u65e5\u671f\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>SELECT SYSDATE + 7 AS future_date FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u65e5\u671f\u52a0\u4e0a7\u5929\u7684\u7d50\u679c\u3002<\/p>\n<h2 id=\"5-%e6%97%a5%e6%9c%9f%e6%af%94%e8%bc%83-kcjRugFPTp\">5. \u65e5\u671f\u6bd4\u8f03<\/h2>\n<p>\u5728\u9032\u884c\u65e5\u671f\u6bd4\u8f03\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>BETWEEN<\/code>\u95dc\u9375\u5b57\u4f86\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u65e5\u671f\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u57282023\u5e7410\u67081\u65e5\u81f32023\u5e7410\u670831\u65e5\u4e4b\u9593\u7684\u6240\u6709\u8a18\u9304\uff1a<\/p>\n<pre><code>SELECT * FROM your_table WHERE your_date_column BETWEEN TO_DATE('2023-10-01', 'YYYY-MM-DD') AND TO_DATE('2023-10-31', 'YYYY-MM-DD');<\/code><\/pre>\n<h2 id=\"6-%e4%bd%bf%e7%94%a8interval%e9%80%b2%e8%a1%8c%e6%97%a5%e6%9c%9f%e8%a8%88%e7%ae%97-kcjRugFPTp\">6. \u4f7f\u7528INTERVAL\u9032\u884c\u65e5\u671f\u8a08\u7b97<\/h2>\n<p>Oracle\u9084\u63d0\u4f9b\u4e86<code>INTERVAL<\/code>\u95dc\u9375\u5b57\u4f86\u9032\u884c\u66f4\u9748\u6d3b\u7684\u65e5\u671f\u8a08\u7b97\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u7372\u53d6\u7576\u524d\u65e5\u671f\u52a0\u4e0a10\u5929\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT SYSDATE + INTERVAL '10' DAY AS future_date FROM dual;<\/code><\/pre>\n<h2 id=\"7-%e8%bd%89%e6%8f%9b%e6%97%a5%e6%9c%9f%e6%a0%bc%e5%bc%8f-kcjRugFPTp\">7. \u8f49\u63db\u65e5\u671f\u683c\u5f0f<\/h2>\n<p>\u4f7f\u7528<code>TO_DATE<\/code>\u51fd\u6578\u53ef\u4ee5\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT TO_DATE('2023-10-01', 'YYYY-MM-DD') AS converted_date FROM dual;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kcjRugFPTp\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u6642\u9593\u8207\u65e5\u671f\u7684\u64cd\u4f5c\u662f\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528\u5404\u7a2e\u51fd\u6578\u548c\u6578\u64da\u985e\u578b\uff0c\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u65e5\u671f\u7684\u7372\u53d6\u3001\u683c\u5f0f\u5316\u3001\u8a08\u7b97\u548c\u6bd4\u8f03\u7b49\u64cd\u4f5c\u3002\u9019\u4e9b\u64cd\u4f5c\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u4e5f\u70ba\u7528\u6236\u63d0\u4f9b\u4e86\u66f4\u9748\u6d3b\u7684\u6578\u64da\u7ba1\u7406\u65b9\u5f0f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728Oracle\u4e2d\u9032\u884c\u66f4\u6df1\u5165\u7684\u6642\u9593\u8207\u65e5\u671f\u64cd\u4f5c\u6709\u8208\u8da3\uff0c\u6216\u662f\u9700\u8981\u9ad8\u6548\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u4e2d\u6642\u9593\u8207\u65e5\u671f\u7684\u64cd\u4f5c\u5be6\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u8655\u7406\u548c\u683c\u5f0f\u5316\u65e5\u671f\u6642\u9593\u6578\u64da\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-95338","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95338","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=95338"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95338\/revisions"}],"predecessor-version":[{"id":95339,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95338\/revisions\/95339"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}