{"id":6077,"date":"2024-11-14T11:37:51","date_gmt":"2024-11-14T03:37:51","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6077\/"},"modified":"2024-11-14T11:37:51","modified_gmt":"2024-11-14T03:37:51","slug":"oracle%e6%95%b0%e6%8d%ae%e5%ba%93%e5%a6%82%e4%bd%95%e5%88%86%e9%a1%b5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6077\/","title":{"rendered":"oracle\u6570\u636e\u5e93\u5982\u4f55\u5206\u9875"},"content":{"rendered":"

\n oracle \u6570\u636e\u5e93\u5206\u9875\u5229\u7528 rownum \u4f2a\u5217\u6216 fetch \u8bed\u53e5\u5b9e\u73b0\uff1arownum \u4f2a\u5217\u7528\u4e8e\u901a\u8fc7\u884c\u53f7\u8fc7\u6ee4\u7ed3\u679c\uff0c\u9002\u7528\u4e8e\u590d\u6742\u67e5\u8be2\u3002fetch \u8bed\u53e5\u7528\u4e8e\u83b7\u53d6\u6307\u5b9a\u6570\u91cf\u7684\u7b2c\u4e00\u884c\uff0c\u9002\u7528\u4e8e\u7b80\u5355\u67e5\u8be2\u3002\n<\/p><\/blockquote>\n

\"oracle\u6570\u636e\u5e93\u5982\u4f55\u5206\u9875\u63d2\u56fe\"<\/p>\n

Oracle \u6570\u636e\u5e93\u5206\u9875\u673a\u5236<\/strong><\/p>\n

\u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 ROWNUM<\/strong> \u4f2a\u5217\u6216 FETCH<\/strong> \u8bed\u53e5\u6765\u5b9e\u73b0\u5206\u9875\u3002<\/p>\n

ROWNUM \u4f2a\u5217<\/strong><\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

SELECT * FROM table_name WHERE ROWNUM <= <page_size> * <page_number><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8bf4\u660e\uff1a<\/strong><\/p>\n
    \n
  •  ROWNUM<\/strong> \u662f\u4e00\u4e2a\u4f2a\u5217\uff0c\u8868\u793a\u5f53\u524d\u884c\u7684\u884c\u53f7\u3002<\/li>\n
  •  page_size<\/strong> \u662f\u6bcf\u9875\u7684\u884c\u6570\u3002<\/li>\n
  •  page_number<\/strong> \u662f\u8981\u83b7\u53d6\u7684\u9875\u6570\u3002<\/li>\n<\/ul>\n
    \u4f8b\u5982\uff1a<\/strong><\/p>\n
    \u83b7\u53d6\u7b2c 2 \u9875\uff0c\u6bcf\u9875 5 \u884c\u7684\u6570\u636e\uff1a<\/p>\n
    SELECT * FROM table_name WHERE ROWNUM <= 5 * 2<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    FETCH \u8bed\u53e5<\/strong><\/p>\n
    \u8bed\u6cd5\uff1a<\/strong><\/p>\n
    FETCH FIRST <page_size> ROWS ONLY FROM table_name<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8bf4\u660e\uff1a<\/strong><\/p>\n
      \n
    •  FETCH<\/strong> \u8bed\u53e5\u8fd4\u56de\u6307\u5b9a\u6570\u91cf\u7684\u7b2c\u4e00\u884c\u3002<\/li>\n
    •  page_size<\/strong> \u662f\u6bcf\u9875\u7684\u884c\u6570\u3002<\/li>\n<\/ul>\n
      \u4f8b\u5982\uff1a<\/strong><\/p>\n
      \u83b7\u53d6\u7b2c\u4e8c\u9875\uff0c\u6bcf\u9875 5 \u884c\u7684\u6570\u636e\uff1a<\/p>\n
      FETCH FIRST 5 ROWS ONLY FROM table_name\nOFFSET 5 ROWS<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u9009\u62e9\u5206\u9875\u65b9\u6cd5<\/strong><\/p>\n
        \n
      • \u5982\u679c\u9700\u8981\u5728\u67e5\u8be2\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u8fc7\u6ee4\u6216\u6392\u5e8f\uff0c\u5219\u4f7f\u7528 ROWNUM<\/strong> \u4f2a\u5217\u3002<\/li>\n
      • \u5982\u679c\u53ea\u9700\u8981\u83b7\u53d6\u6307\u5b9a\u6570\u91cf\u7684\u7b2c\u4e00\u884c\uff08\u4e0d\u8fdb\u884c\u590d\u6742\u7684\u8fc7\u6ee4\u6216\u6392\u5e8f\uff09\uff0c\u5219\u4f7f\u7528 FETCH<\/strong> \u8bed\u53e5\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u5e93\u5982\u4f55\u5206\u9875\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":"
        oracle \u6570\u636e\u5e93\u5206\u9875\u5229\u7528 rownum \u4f2a\u5217\u6216 fetch \u8bed\u53e5\u5b9e\u73b0\uff1arownum \u4f2a\u5217\u7528\u4e8e\u901a\u8fc7\u884c\u53f7\u8fc7\u6ee4\u7ed3\u679c\uff0c\u9002\u7528\u4e8e\u590d\u6742\u67e5\u8be2\u3002fetch \u8bed\u53e5\u7528\u4e8e\u83b7\u53d6\u6307\u5b9a\u6570\u91cf\u7684\u7b2c\u4e00\u884c\uff0c\u9002\u7528\u4e8e\u7b80\u5355\u67e5\u8be2\u3002 Oracle \u6570\u636e\u5e93\u5206\u9875\u673a\u5236 \u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 ROWNUM \u4f2a\u5217\u6216 FETCH \u8bed\u53e5\u6765\u5b9e\u73b0\u5206\u9875\u3002 ROWNUM \u4f2a\u5217 \u8bed\u6cd5\uff1a SELECT * FROM table_name WHERE ROWNUM <= <page_size> * <page_number> \u767b\u5f55\u540e\u590d\u5236 \u8bf4\u660e\uff1a ROWNUM \u662f\u4e00\u4e2a\u4f2a\u5217\uff0c\u8868\u793a\u5f53\u524d\u884c\u7684\u884c\u53f7\u3002 page_size \u662f\u6bcf\u9875\u7684\u884c\u6570\u3002 page_number \u662f\u8981\u83b7\u53d6\u7684\u9875\u6570\u3002 \u4f8b\u5982\uff1a \u83b7\u53d6\u7b2c 2 \u9875\uff0c\u6bcf\u9875 5 \u884c\u7684\u6570\u636e\uff1a SELECT * FROM table_name WHERE ROWNUM <= 5 * 2 \u767b\u5f55\u540e\u590d\u5236 […]<\/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-6077","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6077","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=6077"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6077\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}