{"id":4995,"date":"2024-11-14T09:45:24","date_gmt":"2024-11-14T01:45:24","guid":{"rendered":"https:\/\/fwq.ai\/blog\/4995\/"},"modified":"2024-11-14T09:45:24","modified_gmt":"2024-11-14T01:45:24","slug":"oracle%e6%80%8e%e4%b9%88%e6%af%94%e8%be%83%e6%97%a5%e6%9c%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/4995\/","title":{"rendered":"oracle\u600e\u4e48\u6bd4\u8f83\u65e5\u671f"},"content":{"rendered":"<blockquote><p>\n  oracle \u63d0\u4f9b\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u7528\u4e8e\u65e5\u671f\u548c\u65f6\u95f4\u503c\u6bd4\u8f83\uff0c\u8fd9\u4e9b\u6bd4\u8f83\u8fd0\u7b97\u7b26\u5305\u62ec\u76f8\u7b49\uff08=\uff09\u3001\u4e0d\u76f8\u7b49\uff08!=\uff09\u3001\u5c0f\u4e8e\uff08\uff09\u3001\u5c0f\u4e8e\u6216\u7b49\u4e8e\uff08=\uff09\u3002\u6b64\u5916\uff0c\u8fd8\u63d0\u4f9b\u4e86\u51fd\u6570\uff0c\u5982 to_date\u3001trunc\u3001add_months\u3001last_day\u3001next_day\uff0c\u7528\u4e8e\u8f6c\u6362\u3001\u622a\u65ad\u3001\u6dfb\u52a0\u6708\u4efd\u3001\u83b7\u53d6\u6708\u4efd\u6700\u540e\u4e00\u5929\u548c\u83b7\u53d6\u6307\u5b9a\u65e5\u671f\u7684\u4e0b\u4e00\u5929\u7b49\u64cd\u4f5c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/21\/2024052109211936480.jpg\" class=\"aligncenter\" title=\"oracle\u600e\u4e48\u6bd4\u8f83\u65e5\u671f\u63d2\u56fe\" alt=\"oracle\u600e\u4e48\u6bd4\u8f83\u65e5\u671f\u63d2\u56fe\" \/><\/p>\n<p><strong>Oracle \u65e5\u671f\u6bd4\u8f83<\/strong><\/p>\n<p>Oracle \u63d0\u4f9b\u4e86\u8bb8\u591a\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u3002\u8fd9\u4e9b\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u5bf9\u4e8e\u5728\u67e5\u8be2\u548c\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5904\u7406\u65e5\u671f\u6570\u636e\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p><strong>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/strong><\/p>\n<p>Oracle \u652f\u6301\u4ee5\u4e0b\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff1a<\/p>\n<ul>\n<li>=\uff1a\u76f8\u7b49<\/li>\n<li>!=\uff1a\u4e0d\u76f8\u7b49<\/li>\n<li> <\/li>\n<li>&gt;\uff1a\u5927\u4e8e<\/li>\n<li> <\/li>\n<li>&gt;=\uff1a\u5927\u4e8e\u6216\u7b49\u4e8e<\/li>\n<\/ul>\n<p><strong>\u51fd\u6570<\/strong><\/p>\n<p>Oracle \u8fd8\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570\uff1a<\/p>\n<ul>\n<li>TO_DATE\uff1a\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u65e5\u671f\u503c<\/li>\n<li>TRUNC\uff1a\u622a\u65ad\u65e5\u671f\u6216\u65f6\u95f4\u503c<\/li>\n<li>ADD_MONTHS\uff1a\u5411\u65e5\u671f\u503c\u6dfb\u52a0\u6307\u5b9a\u6570\u91cf\u7684\u6708\u4efd<\/li>\n<li>LAST_DAY\uff1a\u8fd4\u56de\u6307\u5b9a\u65e5\u671f\u6240\u5728\u7684\u6708\u4efd\u7684\u6700\u540e\u4e00\u5929<\/li>\n<li>NEXT_DAY\uff1a\u8fd4\u56de\u6307\u5b9a\u65e5\u671f\u4e4b\u540e\u7684\u4e0b\u4e00\u4e2a\u65e5\u671f<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528 Oracle \u65e5\u671f\u6bd4\u8f83\u8fd0\u7b97\u7b26\u548c\u51fd\u6570\u7684\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n<ul>\n<li>\u6bd4\u8f83\u4e24\u4e2a\u65e5\u671f\u503c\uff1aSELECT CASE WHEN date1 = date2 THEN &#8216;Equal&#8217; ELSE &#8216;Not Equal&#8217; END FROM table_name;<\/li>\n<li>\u68c0\u67e5\u65e5\u671f\u662f\u5426\u5c0f\u4e8e\u5f53\u524d\u65e5\u671f\uff1aSELECT CASE WHEN date1 <\/li>\n<li>\u83b7\u53d6\u6307\u5b9a\u65e5\u671f\u7684\u524d\u4e00\u4e2a\u6708\u6700\u540e\u4e00\u5929\uff1aSELECT LAST_DAY(ADD_MONTHS(date1, -1)) FROM table_name;<\/li>\n<li>\u68c0\u67e5\u65e5\u671f\u662f\u5426\u5728\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\uff1aSELECT CASE WHEN date1 BETWEEN date2 AND date3 THEN &#8216;True&#8217; ELSE &#8216;False&#8217; END FROM table_name;<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u6bd4\u8f83\u65e5\u671f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>oracle \u63d0\u4f9b\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u7528\u4e8e\u65e5\u671f\u548c\u65f6\u95f4\u503c\u6bd4\u8f83\uff0c\u8fd9\u4e9b\u6bd4\u8f83\u8fd0\u7b97\u7b26\u5305\u62ec\u76f8\u7b49\uff08=\uff09\u3001\u4e0d\u76f8\u7b49\uff08!=\uff09\u3001\u5c0f\u4e8e\uff08\uff09\u3001\u5c0f\u4e8e\u6216\u7b49\u4e8e\uff08=\uff09\u3002\u6b64\u5916\uff0c\u8fd8\u63d0\u4f9b\u4e86\u51fd\u6570\uff0c\u5982 to_date\u3001trunc\u3001add_months\u3001last_day\u3001next_day\uff0c\u7528\u4e8e\u8f6c\u6362\u3001\u622a\u65ad\u3001\u6dfb\u52a0\u6708\u4efd\u3001\u83b7\u53d6\u6708\u4efd\u6700\u540e\u4e00\u5929\u548c\u83b7\u53d6\u6307\u5b9a\u65e5\u671f\u7684\u4e0b\u4e00\u5929\u7b49\u64cd\u4f5c\u3002 Oracle \u65e5\u671f\u6bd4\u8f83 Oracle \u63d0\u4f9b\u4e86\u8bb8\u591a\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u3002\u8fd9\u4e9b\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u5bf9\u4e8e\u5728\u67e5\u8be2\u548c\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5904\u7406\u65e5\u671f\u6570\u636e\u975e\u5e38\u6709\u7528\u3002 \u6bd4\u8f83\u8fd0\u7b97\u7b26 Oracle \u652f\u6301\u4ee5\u4e0b\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff1a =\uff1a\u76f8\u7b49 !=\uff1a\u4e0d\u76f8\u7b49 &gt;\uff1a\u5927\u4e8e &gt;=\uff1a\u5927\u4e8e\u6216\u7b49\u4e8e \u51fd\u6570 Oracle \u8fd8\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u7528\u4e8e\u6bd4\u8f83\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570\uff1a TO_DATE\uff1a\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u65e5\u671f\u503c TRUNC\uff1a\u622a\u65ad\u65e5\u671f\u6216\u65f6\u95f4\u503c ADD_MONTHS\uff1a\u5411\u65e5\u671f\u503c\u6dfb\u52a0\u6307\u5b9a\u6570\u91cf\u7684\u6708\u4efd LAST_DAY\uff1a\u8fd4\u56de\u6307\u5b9a\u65e5\u671f\u6240\u5728\u7684\u6708\u4efd\u7684\u6700\u540e\u4e00\u5929 NEXT_DAY\uff1a\u8fd4\u56de\u6307\u5b9a\u65e5\u671f\u4e4b\u540e\u7684\u4e0b\u4e00\u4e2a\u65e5\u671f \u793a\u4f8b \u4ee5\u4e0b\u662f\u4f7f\u7528 Oracle \u65e5\u671f\u6bd4\u8f83\u8fd0\u7b97\u7b26\u548c\u51fd\u6570\u7684\u4e00\u4e9b\u793a\u4f8b\uff1a \u6bd4\u8f83\u4e24\u4e2a\u65e5\u671f\u503c\uff1aSELECT CASE WHEN date1 = date2 THEN &#8216;Equal&#8217; ELSE &#8216;Not Equal&#8217; END FROM table_name; \u68c0\u67e5\u65e5\u671f\u662f\u5426\u5c0f\u4e8e\u5f53\u524d\u65e5\u671f\uff1aSELECT CASE WHEN date1 \u83b7\u53d6\u6307\u5b9a\u65e5\u671f\u7684\u524d\u4e00\u4e2a\u6708\u6700\u540e\u4e00\u5929\uff1aSELECT LAST_DAY(ADD_MONTHS(date1, -1)) FROM table_name; \u68c0\u67e5\u65e5\u671f\u662f\u5426\u5728\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\uff1aSELECT CASE WHEN date1 BETWEEN date2 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-4995","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/4995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=4995"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/4995\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=4995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=4995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=4995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}