{"id":203893,"date":"2025-05-22T09:31:30","date_gmt":"2025-05-22T01:31:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203893\/"},"modified":"2025-05-22T09:31:30","modified_gmt":"2025-05-22T01:31:30","slug":"mysql%e7%ad%89%e5%8f%b7%e5%88%a4%e6%96%ad%e5%87%ba%e7%8e%b0%e6%a8%a1%e7%b3%8a%e5%8c%b9%e9%85%8d%e7%9a%84%e5%8e%9f%e5%9b%a0%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203893\/","title":{"rendered":"MySQL\u7b49\u53f7\u5224\u65ad\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339\u914d\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>MySQL\u7b49\u53f7\u5224\u65ad\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339\u914d\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h1>\n<p>\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aMySQL\u7b49\u53f7\u5224\u65ad\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339\u914d\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241130\/1732948971674ab3eb06e48.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>sql \u76f8\u7b49\u5224\u65ad\u4e3a\u4f55\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339\u914d\uff1f<\/strong><\/p>\n<p>\u5728 mysql \u4e2d\u4f7f\u7528\u7b49\u53f7\u8fdb\u884c\u5224\u65ad\u65f6\uff0c\u9884\u671f\u53ea\u6709\u76f8\u7b49\u7684\u6570\u636e\u624d\u4f1a\u88ab\u67e5\u8be2\u51fa\u6765\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u67e5\u8be2\u7ed3\u679c\u53ef\u80fd\u7c7b\u4f3c\u4e8e\u201c\u6a21\u7cca\u201d\u5339\u914d\u3002<\/p>\n<p><strong>\u6f5c\u5728\u539f\u56e0\uff1a\u6570\u636e\u7c7b\u578b\u4e0d\u4e00\u81f4<\/strong><\/p>\n<p>\u5bfc\u81f4\u6b64\u95ee\u9898\u7684\u5e38\u89c1\u539f\u56e0\u4e4b\u4e00\u662f\u6bd4\u5bf9\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u4e0d\u4e00\u81f4\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8868 a_temp_sw \u4e2d\u5b57\u6bb5 id \u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u800c\u8868 ods_raw_order_po \u4e2d\u5b57\u6bb5 raw_order_po_id \u662f\u6570\u5b57\u7c7b\u578b\uff0c\u5219\u5728\u4f7f\u7528 a_temp_sw.id = ods_raw_order_po.raw_order_po_id \u8fdb\u884c\u5224\u65ad\u65f6\uff0cmysql \u53ef\u80fd\u4f1a\u5c06\u5b57\u7b26\u4e32\u9690\u5f0f\u8f6c\u6362\u4e3a\u6570\u5b57\uff0c\u4ece\u800c\u5bfc\u81f4\u67e5\u8be2\u7ed3\u679c\u51fa\u73b0\u7c7b\u4f3c\u4e8e\u201c\u6a21\u7cca\u201d\u5339\u914d\u7684\u60c5\u51b5\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a\u68c0\u67e5\u6570\u636e\u7c7b\u578b\u5e76\u8fdb\u884c\u5fc5\u8981\u8f6c\u6362<\/strong><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u8bf7\u68c0\u67e5\u4e24\u4e2a\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u662f\u5426\u5339\u914d\u3002\u5982\u679c\u7c7b\u578b\u4e0d\u4e00\u81f4\uff0c\u8bf7\u5bf9\u6570\u636e\u8fdb\u884c\u5fc5\u8981\u7684\u8f6c\u6362\u4ee5\u786e\u4fdd\u5b83\u4eec\u5339\u914d\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 cast \u51fd\u6570\u5c06\u5b57\u6bb5\u503c\u663e\u5f0f\u8f6c\u6362\u4e3a\u6240\u9700\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>SELECT *\nFROM a_temp_sw\nWHERE CAST(id AS UNSIGNED) = ods_raw_order_po.raw_order_po_id;<\/pre>\n<p>\u901a\u8fc7\u68c0\u67e5\u6570\u636e\u7c7b\u578b\u5e76\u8fdb\u884c\u5fc5\u8981\u8f6c\u6362\uff0c\u53ef\u4ee5\u786e\u4fdd\u7b49\u53f7\u5224\u65ad\u6b63\u786e\uff0c\u67e5\u8be2\u7ed3\u679c\u53ea\u5305\u542b\u76f8\u7b49\u7684\u6570\u636e\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aMySQL\u7b49\u53f7\u5224\u65ad\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339\u914d\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u7b49\u53f7\u5224\u65ad\u51fa\u73b0\u201c\u6a21\u7cca\u201d\u5339&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203893","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203893"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203893\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}