{"id":6897,"date":"2024-11-14T13:22:40","date_gmt":"2024-11-14T05:22:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6897\/"},"modified":"2024-11-14T13:22:40","modified_gmt":"2024-11-14T05:22:40","slug":"sql%e4%b8%ad%e4%b9%90%e8%a7%82%e9%94%81%e5%92%8c%e6%82%b2%e8%a7%82%e9%94%81%e6%98%af%e5%a6%82%e4%bd%95%e4%bd%93%e7%8e%b0%e7%9a%84%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6897\/","title":{"rendered":"SQL\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5982\u4f55\u4f53\u73b0\u7684\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173003293120545.jpg\" class=\"aligncenter\" title=\"SQL\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5982\u4f55\u4f53\u73b0\u7684\uff1f\u63d2\u56fe\" alt=\"SQL\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5982\u4f55\u4f53\u73b0\u7684\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>sql\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u7684\u4f53\u73b0<\/strong><\/p>\n<p>\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5e76\u53d1\u63a7\u5236\u4e2d\u5e38\u7528\u7684\u4e24\u79cd\u6280\u672f\uff0c\u5b83\u4eec\u5728sql\u4e2d\u7684\u4f53\u73b0\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<p><strong>\u4e50\u89c2\u9501<\/strong><\/p>\n<p>\u4e50\u89c2\u9501\u57fa\u4e8e\u8fd9\u6837\u7684\u5047\u8bbe\uff1a\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5e76\u53d1\u4e8b\u52a1\u4e0d\u4f1a\u51b2\u7a81\u3002\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u4fee\u6539\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u5148\u8bfb\u53d6\u8be5\u6570\u636e\u7684\u7248\u672c\u53f7\uff08\u65f6\u95f4\u6233\u6216\u5e8f\u5217\u53f7\uff09\u3002\u4e4b\u540e\uff0c\u5728\u63d0\u4ea4\u4e8b\u52a1\u4e4b\u524d\uff0c\u4e8b\u52a1\u4f1a\u518d\u6b21\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u68c0\u67e5\u5199\u5165\u7684\u7248\u672c\u53f7\u662f\u5426\u4e0e\u4e4b\u524d\u7684\u7248\u672c\u53f7\u76f8\u540c\u3002\u5982\u679c\u7248\u672c\u53f7\u76f8\u540c\uff0c\u5219\u63d0\u4ea4\u4e8b\u52a1\uff1b\u5426\u5219\uff0c\u4e8b\u52a1\u4f1a\u56de\u6eda\u5e76\u62a5\u544a\u51b2\u7a81\u3002<\/p>\n<p>\u5728sql\u4e2d\uff0c\u4e50\u89c2\u9501\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528select &#8230; where\u548cupdate &#8230; where\u8bed\u53e5\u6765\u5b9e\u73b0\uff1a<\/p>\n<pre># \u4e50\u89c2\u9501\nselect * from table_name where version = 1\n# ... \u66f4\u65b0\u6570\u636e\nupdate table_name set value = 'new_value' where version = 1<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>\u60b2\u89c2\u9501<\/strong><\/p>\n<p>\u60b2\u89c2\u9501\u57fa\u4e8e\u8fd9\u6837\u7684\u5047\u8bbe\uff1a\u5e76\u53d1\u4e8b\u52a1\u5f88\u53ef\u80fd\u51b2\u7a81\u3002\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u4fee\u6539\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u5148\u5bf9\u8be5\u6570\u636e\u8fdb\u884c\u9501\u5b9a\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002\u53ea\u6709\u5728\u91ca\u653e\u9501\u5b9a\u540e\uff0c\u5176\u4ed6\u4e8b\u52a1\u624d\u80fd\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n<p>\u5728sql\u4e2d\uff0c\u60b2\u89c2\u9501\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528select &#8230; for update\u8bed\u53e5\u6765\u5b9e\u73b0\uff1a<\/p>\n<pre># \u60b2\u89c2\u9501\nSELECT * FROM table_name FOR UPDATE\n# ... \u66f4\u65b0\u6570\u636e\nUPDATE table_name SET value = 'new_value'<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>\u63a7\u5236\u60b2\u89c2\u9501\u548c\u4e50\u89c2\u9501<\/strong><\/p>\n<p>\u5728sql\u4e2d\uff0c\u65e0\u6cd5\u50cf\u63a7\u5236\u4e8b\u52a1\u7ea7\u522b\u4e00\u6837\u4f7f\u7528\u5355\u4e2a\u547d\u4ee4\u6765\u63a7\u5236\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u3002\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u7684\u5b9e\u73b0\u65b9\u5f0f\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u6570\u636e\u5e93\u5f15\u64ce\u548c\u6240\u4f7f\u7528\u7684sql\u65b9\u8a00\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fSQL\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5982\u4f55\u4f53\u73b0\u7684\uff1f\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>sql\u4e2d\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u7684\u4f53\u73b0 \u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u662f\u5e76\u53d1\u63a7\u5236\u4e2d\u5e38\u7528\u7684\u4e24\u79cd\u6280\u672f\uff0c\u5b83\u4eec\u5728sql\u4e2d\u7684\u4f53\u73b0\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\u3002 \u4e50\u89c2\u9501 \u4e50\u89c2\u9501\u57fa\u4e8e\u8fd9\u6837\u7684\u5047\u8bbe\uff1a\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5e76\u53d1\u4e8b\u52a1\u4e0d\u4f1a\u51b2\u7a81\u3002\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u4fee\u6539\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u5148\u8bfb\u53d6\u8be5\u6570\u636e\u7684\u7248\u672c\u53f7\uff08\u65f6\u95f4\u6233\u6216\u5e8f\u5217\u53f7\uff09\u3002\u4e4b\u540e\uff0c\u5728\u63d0\u4ea4\u4e8b\u52a1\u4e4b\u524d\uff0c\u4e8b\u52a1\u4f1a\u518d\u6b21\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u68c0\u67e5\u5199\u5165\u7684\u7248\u672c\u53f7\u662f\u5426\u4e0e\u4e4b\u524d\u7684\u7248\u672c\u53f7\u76f8\u540c\u3002\u5982\u679c\u7248\u672c\u53f7\u76f8\u540c\uff0c\u5219\u63d0\u4ea4\u4e8b\u52a1\uff1b\u5426\u5219\uff0c\u4e8b\u52a1\u4f1a\u56de\u6eda\u5e76\u62a5\u544a\u51b2\u7a81\u3002 \u5728sql\u4e2d\uff0c\u4e50\u89c2\u9501\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528select &#8230; where\u548cupdate &#8230; where\u8bed\u53e5\u6765\u5b9e\u73b0\uff1a # \u4e50\u89c2\u9501 select * from table_name where version = 1 # &#8230; \u66f4\u65b0\u6570\u636e update table_name set value = &#8216;new_value&#8217; where version = 1 \u767b\u5f55\u540e\u590d\u5236 \u60b2\u89c2\u9501 \u60b2\u89c2\u9501\u57fa\u4e8e\u8fd9\u6837\u7684\u5047\u8bbe\uff1a\u5e76\u53d1\u4e8b\u52a1\u5f88\u53ef\u80fd\u51b2\u7a81\u3002\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u4fee\u6539\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u5148\u5bf9\u8be5\u6570\u636e\u8fdb\u884c\u9501\u5b9a\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002\u53ea\u6709\u5728\u91ca\u653e\u9501\u5b9a\u540e\uff0c\u5176\u4ed6\u4e8b\u52a1\u624d\u80fd\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002 \u5728sql\u4e2d\uff0c\u60b2\u89c2\u9501\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528select &#8230; for update\u8bed\u53e5\u6765\u5b9e\u73b0\uff1a # \u60b2\u89c2\u9501 SELECT * FROM table_name FOR UPDATE # &#8230; \u66f4\u65b0\u6570\u636e UPDATE table_name SET value = [&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-6897","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6897","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=6897"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6897\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}