{"id":26270,"date":"2024-11-24T12:55:55","date_gmt":"2024-11-24T04:55:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/26270\/"},"modified":"2024-11-24T12:55:55","modified_gmt":"2024-11-24T04:55:55","slug":"mysql-%e5%8f%af%e9%87%8d%e5%a4%8d%e8%af%bb%e9%9a%94%e7%a6%bb%e7%ba%a7%e5%88%ab%e4%b8%8b%ef%bc%8c%e4%ba%8b%e5%8a%a1%e6%9b%b4%e6%96%b0%e6%95%b0%e6%8d%ae%e5%90%8e%e5%85%b6%e4%bb%96%e4%ba%8b%e5%8a%a1-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/26270\/","title":{"rendered":"MySQL \u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4e8b\u52a1\u66f4\u65b0\u6570\u636e\u540e\u5176\u4ed6\u4e8b\u52a1\u4e3a\u4f55\u80fd\u7acb\u523b\u770b\u5230\uff1f"},"content":{"rendered":"

\"MySQL<\/p>\n

MySQL \u66f4\u65b0\u540e Select \u4e3a\u4ec0\u4e48\u53ef\u4ee5\u7acb\u5373\u770b\u5230<\/strong><\/p>\n

\u95ee\u9898\uff1a<\/strong><\/p>\n

\u5728 MySQL \u4e2d\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e3a\u53ef\u91cd\u590d\u8bfb\u65f6\uff0c\u5f53\u4e8b\u52a1 A \u66f4\u65b0\u4e00\u6761\u6570\u636e\u540e\uff0c\u5176\u4ed6\u4e8b\u52a1 B \u4e3a\u4ec0\u4e48\u4f9d\u7136\u53ef\u4ee5\u901a\u8fc7 Select \u67e5\u8be2\u5230\u66f4\u65b0\u540e\u7684\u6570\u636e\uff1f\u6309\u7167 MVCC \u673a\u5236\uff0cB \u4e8b\u52a1\u4e0d\u5e94\u8be5\u53ea\u80fd\u770b\u5230\u6570\u636e\u7684\u5feb\u7167\u72b6\u6001\u5417\uff1f<\/p>\n

\u7b54\u6848\uff1a<\/strong><\/p>\n

MVCC \u7684\u5339\u914d\u89c4\u5219\u5e76\u975e\u4ec5\u6709\u4e00\u6761\uff0c\u800c\u662f\u6709\u4e09\u6761\uff1a<\/p>\n

    \n
  1. \u4e8b\u52a1 ID \u5927\u4e8e\u7b49\u4e8e row\u7684<\/span>m_low_limit_id \u548c\u5c0f\u4e8e\u7b49\u4e8e row \u7684 m_up_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002<\/li>\n
  2. \u4e8b\u52a1 ID \u5c0f\u4e8e row \u7684 m_low_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002<\/li>\n
  3. \u4e8b\u52a1 ID \u5927\u4e8e row \u7684 m_up_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002<\/li>\n<\/ol>\n

    \u9898\u4e2d\u63d0\u5230\u7684\u573a\u666f\u7b26\u5408\u7b2c\u4e00\u6761\u5339\u914d\u89c4\u5219\uff0c\u5373\u4e8b\u52a1 A \u7684 ID \u5927\u4e8e row\uff08ID \u4e3a 5\uff09\u7684 m_low_limit_id\uff08\u4e8b\u52a1 B \u7684 ID \u52a0 1\uff09\u5e76\u4e14\u5c0f\u4e8e\u7b49\u4e8e row \u7684 m_up_limit_id\uff08\u4e8b\u52a1 A \u7684 ID\uff09\u3002\u56e0\u6b64\uff0c\u5373\u4f7f\u4e8b\u52a1 B \u5bf9 row \u6267\u884c\u4e86\u66f4\u65b0\u64cd\u4f5c\uff0c\u4e8b\u52a1 A \u4f9d\u7136\u53ef\u4ee5\u901a\u8fc7 Select \u67e5\u8be2\u5230\u66f4\u65b0\u540e\u7684\u6570\u636e\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u4e8b\u52a1 B \u63d0\u4ea4\u3002<\/p>\n

    \u4ee5\u4e0a\u5c31\u662fMySQL \u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4e8b\u52a1\u66f4\u65b0\u6570\u636e\u540e\u5176\u4ed6\u4e8b\u52a1\u4e3a\u4f55\u80fd\u7acb\u523b\u770b\u5230\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

    MySQL \u66f4\u65b0\u540e Select \u4e3a\u4ec0\u4e48\u53ef\u4ee5\u7acb\u5373\u770b\u5230 \u95ee\u9898\uff1a \u5728 MySQL \u4e2d\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e3a\u53ef\u91cd\u590d\u8bfb\u65f6\uff0c\u5f53\u4e8b\u52a1 A \u66f4\u65b0\u4e00\u6761\u6570\u636e\u540e\uff0c\u5176\u4ed6\u4e8b\u52a1 B \u4e3a\u4ec0\u4e48\u4f9d\u7136\u53ef\u4ee5\u901a\u8fc7 Select \u67e5\u8be2\u5230\u66f4\u65b0\u540e\u7684\u6570\u636e\uff1f\u6309\u7167 MVCC \u673a\u5236\uff0cB \u4e8b\u52a1\u4e0d\u5e94\u8be5\u53ea\u80fd\u770b\u5230\u6570\u636e\u7684\u5feb\u7167\u72b6\u6001\u5417\uff1f \u7b54\u6848\uff1a MVCC \u7684\u5339\u914d\u89c4\u5219\u5e76\u975e\u4ec5\u6709\u4e00\u6761\uff0c\u800c\u662f\u6709\u4e09\u6761\uff1a \u4e8b\u52a1 ID \u5927\u4e8e\u7b49\u4e8e row\u7684m_low_limit_id \u548c\u5c0f\u4e8e\u7b49\u4e8e row \u7684 m_up_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002 \u4e8b\u52a1 ID \u5c0f\u4e8e row \u7684 m_low_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002 \u4e8b\u52a1 ID \u5927\u4e8e row \u7684 m_up_limit_id \u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u8be5\u884c\u3002 \u9898\u4e2d\u63d0\u5230\u7684\u573a\u666f\u7b26\u5408\u7b2c\u4e00\u6761\u5339\u914d\u89c4\u5219\uff0c\u5373\u4e8b\u52a1 A \u7684 ID \u5927\u4e8e row\uff08ID \u4e3a 5\uff09\u7684 m_low_limit_id\uff08\u4e8b\u52a1 B \u7684 ID […]<\/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-26270","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26270","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=26270"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26270\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=26270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=26270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=26270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}