{"id":1220,"date":"2025-07-29T22:31:14","date_gmt":"2025-07-29T14:31:14","guid":{"rendered":"https:\/\/www.hgfwq.com\/blog\/?p=1220"},"modified":"2025-07-29T22:31:14","modified_gmt":"2025-07-29T14:31:14","slug":"mysql-%e7%9a%84%e9%9a%94%e7%a6%bb%e7%ba%a7%e5%88%ab%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90%e4%b8%8e%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.hgfwq.com\/blog\/1220.html","title":{"rendered":"MySQL \u7684\u9694\u79bb\u7ea7\u522b\u5168\u9762\u89e3\u6790\u4e0e\u5e94\u7528"},"content":{"rendered":"<p><h>MySQL \u7684\u9694\u79bb\u7ea7\u522b\u8be6\u89e3\u6307\u5357<\/h><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.hgfwq.com\/blog\/wp-content\/uploads\/2025\/07\/esHNT.jpg\" alt=\"MySQL \u7684\u9694\u79bb\u7ea7\u522b\u5168\u9762\u89e3\u6790\u4e0e\u5e94\u7528\" title=\"MySQL \u7684\u9694\u79bb\u7ea7\u522b\u5168\u9762\u89e3\u6790\u4e0e\u5e94\u7528\"><\/p>\n<p><p>1. \u5f15\u8a00<\/p>\n<\/p>\n<p>MySQL \u4f5c\u4e3a\u4e00\u6b3e\u5e7f\u6cdb\u4f7f\u7528\u7684\u5f00\u6e90\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u9694\u79bb\u7ea7\u522b\u662f\u4fdd\u8bc1\u6570\u636e\u5e93\u4e00\u81f4\u6027\u548c\u5e76\u53d1\u6027\u80fd\u7684\u5173\u952e\u56e0\u7d20\u3002\u9694\u79bb\u7ea7\u522b\u51b3\u5b9a\u4e86\u4e8b\u52a1\u5728\u5e76\u53d1\u6267\u884c\u65f6\uff0c\u5982\u4f55\u5904\u7406\u6570\u636e\u4e00\u81f4\u6027\u548c\u5e76\u53d1\u8bbf\u95ee\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd MySQL \u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5e76\u63d0\u4f9b\u8be6\u7ec6\u7684\u6307\u5357\u3002<\/p>\n<p><p>2. \u4e8b\u52a1\u548c\u9694\u79bb\u7ea7\u522b\u7684\u6982\u5ff5<\/p>\n<\/p>\n<p>\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u4e8b\u52a1\u662f\u6307\u4e00\u7cfb\u5217\u64cd\u4f5c\u5e8f\u5217\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u8981\u4e48\u5168\u90e8\u5b8c\u6210\uff0c\u8981\u4e48\u5168\u90e8\u4e0d\u505a\u3002\u4e8b\u52a1\u7684\u56db\u4e2a\u57fa\u672c\u7279\u6027\uff08ACID\uff09\u5305\u62ec\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u548c\u6301\u4e45\u6027\u3002\u5176\u4e2d\uff0c\u9694\u79bb\u6027\u662f\u6307\u6570\u636e\u5e93\u7cfb\u7edf\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u5e76\u53d1\u6267\u884c\uff0c\u800c\u4e0d\u4f1a\u76f8\u4e92\u5e72\u6270\uff0c\u4fdd\u8bc1\u6bcf\u4e2a\u4e8b\u52a1\u90fd\u6267\u884c\u5728\u4e00\u4e2a\u9694\u79bb\u7684\u73af\u5883\u4e2d\u3002<\/p>\n<p><p>3. MySQL \u7684\u9694\u79bb\u7ea7\u522b<\/p>\n<\/p>\n<p>MySQL \u652f\u6301\u4ee5\u4e0b\u56db\u79cd\u9694\u79bb\u7ea7\u522b\uff1a<\/p>\n<p><h3>3.1. READ UNCOMMITTED\uff08\u672a\u63d0\u4ea4\u8bfb\uff09<\/h3>\n<\/p>\n<p><p>READ UNCOMMITTED \u5141\u8bb8\u4e8b\u52a1\u8bfb\u53d6\u5c1a\u672a\u63d0\u4ea4\u7684\u6570\u636e\u53d8\u66f4\u3002\u8fd9\u610f\u5473\u7740\u4e00\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u53e6\u4e00\u4e2a\u4e8b\u52a1\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u810f\u8bfb\uff08Dirty Reads\uff09\u3002\u8fd9\u662f\u6700\u4f4e\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u4f46\u53ef\u4ee5\u63d0\u4f9b\u6700\u9ad8\u7684\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n<\/p>\n<p><h3>3.2. READ COMMITTED\uff08\u63d0\u4ea4\u8bfb\uff09<\/h3>\n<\/p>\n<p><p>READ COMMITTED \u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u5df2\u7ecf\u63d0\u4ea4\u7684\u6570\u636e\u53d8\u66f4\u3002\u8fd9\u907f\u514d\u4e86\u810f\u8bfb\uff0c\u4f46\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u53ef\u91cd\u590d\u8bfb\uff08Non-Repeatable Reads\uff09\uff0c\u5373\u540c\u4e00\u4e8b\u52a1\u591a\u6b21\u8bfb\u53d6\u76f8\u540c\u7684\u6570\u636e\uff0c\u7ed3\u679c\u5374\u4e0d\u540c\u3002<\/p>\n<\/p>\n<p><h3>3.3. REPEATABLE READ\uff08\u53ef\u91cd\u590d\u8bfb\uff09<\/h3>\n<\/p>\n<p><p>REPEATABLE READ \u662f MySQL \u9ed8\u8ba4\u7684\u9694\u79bb\u7ea7\u522b\u3002\u5b83\u4fdd\u8bc1\u4e86\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u5185\u591a\u6b21\u8bfb\u53d6\u76f8\u540c\u8bb0\u5f55\u7684\u7ed3\u679c\u662f\u4e00\u81f4\u7684\uff0c\u907f\u514d\u4e86\u810f\u8bfb\u548c\u4e0d\u53ef\u91cd\u590d\u8bfb\u3002\u4f46\u53ef\u80fd\u4f1a\u51fa\u73b0\u5e7b\u8bfb\uff08Phantom Reads\uff09\uff0c\u5373\u4e00\u4e2a\u4e8b\u52a1\u5728\u8bfb\u53d6\u67d0\u4e2a\u8303\u56f4\u7684\u6570\u636e\u65f6\uff0c\u53e6\u4e00\u4e2a\u4e8b\u52a1\u63d2\u5165\u4e86\u4e00\u6761\u6ee1\u8db3\u6761\u4ef6\u7684\u65b0\u8bb0\u5f55\u3002<\/p>\n<\/p>\n<p><h3>3.4. SERIALIZABLE\uff08\u53ef\u4e32\u884c\u5316\uff09<\/h3>\n<\/p>\n<p><p>SERIALIZABLE \u662f\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u901a\u8fc7\u9501\u5b9a\u4e8b\u52a1\u6d89\u53ca\u7684\u6570\u636e\uff0c\u786e\u4fdd\u4e8b\u52a1\u7684\u6267\u884c\u987a\u5e8f\u548c\u4e32\u884c\u6267\u884c\u4e00\u81f4\u3002\u8fd9\u907f\u514d\u4e86\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\u548c\u5e7b\u8bfb\uff0c\u4f46\u6027\u80fd\u5f71\u54cd\u6700\u5927\uff0c\u56e0\u4e3a\u9501\u5b9a\u4e86\u5927\u91cf\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<p><p>4. \u9009\u62e9\u5408\u9002\u7684\u9694\u79bb\u7ea7\u522b<\/p>\n<\/p>\n<p>\u9009\u62e9\u5408\u9002\u7684\u9694\u79bb\u7ea7\u522b\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u6027\u80fd\u8981\u6c42\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9009\u62e9\u9694\u79bb\u7ea7\u522b\u7684\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u4e0d\u9ad8\uff0c\u4e14\u9700\u8981\u9ad8\u5e76\u53d1\u6027\u80fd\uff0c\u53ef\u4ee5\u9009\u62e9 READ UNCOMMITTED\u3002<\/li>\n<li>\u5bf9\u4e8e\u5927\u591a\u6570\u5e94\u7528\uff0cREAD COMMITTED \u662f\u4e00\u4e2a\u5e73\u8861\u70b9\uff0c\u53ef\u4ee5\u907f\u514d\u810f\u8bfb\uff0c\u540c\u65f6\u4fdd\u6301\u8f83\u597d\u7684\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\uff0c\u4e14\u5bf9\u5e76\u53d1\u6027\u80fd\u8981\u6c42\u4e0d\u9ad8\uff0c\u53ef\u4ee5\u9009\u62e9 REPEATABLE READ \u6216 SERIALIZABLE\u3002<\/li>\n<\/ul>\n<p><p>5. \u5982\u4f55\u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b<\/p>\n<\/p>\n<p>\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u5168\u5c40\u53d8\u91cf\u6216\u4f1a\u8bdd\u53d8\u91cf\u6765\u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u3002<\/p>\n<p><h4>5.1. \u8bbe\u7f6e\u5168\u5c40\u53d8\u91cf<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8bbe\u7f6e\u5168\u5c40\u53d8\u91cf\uff0c\u5f71\u54cd\u6240\u6709\u65b0\u8fde\u63a5\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff1a<\/p>\n<\/p>\n<p><pre>SET global transaction isolation level READ COMMITTED;<\/pre>\n<\/p>\n<p><h4>5.2. \u8bbe\u7f6e\u4f1a\u8bdd\u53d8\u91cf<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8bbe\u7f6e\u4f1a\u8bdd\u53d8\u91cf\uff0c\u4ec5\u5f71\u54cd\u5f53\u524d\u4f1a\u8bdd\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff1a<\/p>\n<\/p>\n<p><pre>SET session transaction isolation level REPEATABLE READ;<\/pre>\n<\/p>\n<p><p>6. \u603b\u7ed3<\/p>\n<\/p>\n<p>MySQL \u7684\u9694\u79bb\u7ea7\u522b\u662f\u4fdd\u8bc1\u6570\u636e\u5e93\u4e00\u81f4\u6027\u548c\u5e76\u53d1\u6027\u80fd\u7684\u91cd\u8981\u673a\u5236\u3002\u4e86\u89e3\u4e0d\u540c\u7684\u9694\u79bb\u7ea7\u522b\u53ca\u5176\u7279\u70b9\uff0c\u6709\u52a9\u4e8e\u9009\u62e9\u5408\u9002\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u4ee5\u4f18\u5316\u6570\u636e\u5e93\u6027\u80fd\u548c\u6570\u636e\u4e00\u81f4\u6027\u3002\u5728\u8bbe\u8ba1\u548c\u5f00\u53d1\u6570\u636e\u5e93\u5e94\u7528\u65f6\uff0c\u5e94\u6839\u636e\u5177\u4f53\u9700\u6c42\u5408\u7406\u9009\u62e9\u9694\u79bb\u7ea7\u522b\uff0c\u4ee5\u786e\u4fdd\u7cfb\u7edf\u7a33\u5b9a\u8fd0\u884c\u3002<\/p>\n<p><h>\u95ee\u7b54\u73af\u8282<\/h><\/p>\n<p><b>\u95ee\u9898 1\uff1a<\/b>\u4ec0\u4e48\u662f\u810f\u8bfb\uff1f<\/p>\n<p><p>\u810f\u8bfb\u662f\u6307\u5728 READ UNCOMMITTED \u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4e00\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u5230\u53e6\u4e00\u4e2a\u4e8b\u52a1\u672a\u63d0\u4ea4\u7684\u6570\u636e\u53d8\u66f4\u3002\u8fd9\u4e9b\u6570\u636e\u53ef\u80fd\u662f\u9519\u8bef\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u5c1a\u672a\u88ab\u6301\u4e45\u5316\u3002<\/p>\n<\/p>\n<p><b>\u95ee\u9898 2\uff1a<\/b>\u4ec0\u4e48\u662f\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1f<\/p>\n<p><p>\u4e0d\u53ef\u91cd\u590d\u8bfb\u662f\u6307\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u591a\u6b21\u8bfb\u53d6\u76f8\u540c\u7684\u6570\u636e\uff0c\u7ed3\u679c\u5374\u4e0d\u540c\u3002\u8fd9\u901a\u5e38\u53d1\u751f\u5728 READ COMMITTED \u6216 REPEATABLE READ \u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u5f53\u5176\u4ed6\u4e8b\u52a1\u63d0\u4ea4\u4e86\u6570\u636e\u53d8\u66f4\u65f6\u3002<\/p>\n<\/p>\n<p><b>\u95ee\u9898 3\uff1a<\/b>\u4ec0\u4e48\u662f\u5e7b\u8bfb\uff1f<\/p>\n<p><p>\u5e7b\u8bfb\u662f\u6307\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u5bf9\u67d0\u4e2a\u8303\u56f4\u7684\u6570\u636e\u8fdb\u884c\u8bfb\u53d6\u65f6\uff0c\u53e6\u4e00\u4e2a\u4e8b\u52a1\u63d2\u5165\u4e86\u4e00\u6761\u6ee1\u8db3\u6761\u4ef6\u7684\u65b0\u8bb0\u5f55\uff0c\u5bfc\u81f4\u8bfb\u53d6\u7ed3\u679c\u4e0e\u9884\u671f\u4e0d\u7b26\u3002\u8fd9\u901a\u5e38\u53d1\u751f\u5728 REPEATABLE READ \u6216 SERIALIZABLE \u9694\u79bb\u7ea7\u522b\u4e0b\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL \u7684\u9694\u79bb\u7ea7\u522b\u8be6\u89e3\u6307\u5357 1. \u5f15\u8a00 MySQL \u4f5c\u4e3a\u4e00\u6b3e\u5e7f\u6cdb\u4f7f\u7528\u7684\u5f00\u6e90\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u9694\u79bb\u7ea7\u522b\u662f\u4fdd\u8bc1\u6570\u636e\u5e93\u4e00\u81f4\u6027\u548c\u5e76\u53d1\u6027\u80fd\u7684\u5173\u952e\u56e0\u7d20\u3002\u9694\u79bb\u7ea7\u522b\u51b3\u5b9a\u4e86\u4e8b\u52a1\u5728\u5e76\u53d1\u6267\u884c\u65f6\uff0c\u5982\u4f55\u5904\u7406\u6570\u636e\u4e00\u81f4\u6027\u548c\u5e76\u53d1\u8bbf\u95ee\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd MySQL &#8230;<\/p>\n","protected":false},"author":1,"featured_media":1221,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[326,483,149],"topic":[],"class_list":["post-1220","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-haiwai","tag-mysql","tag-483","tag-149"],"_links":{"self":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/1220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/comments?post=1220"}],"version-history":[{"count":1,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/1220\/revisions"}],"predecessor-version":[{"id":1223,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/1220\/revisions\/1223"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media\/1221"}],"wp:attachment":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media?parent=1220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/categories?post=1220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/tags?post=1220"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/topic?post=1220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}