{"id":5165,"date":"2024-11-14T10:53:05","date_gmt":"2024-11-14T02:53:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5165\/"},"modified":"2024-11-14T10:53:05","modified_gmt":"2024-11-14T02:53:05","slug":"mysql%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e7%8e%af%e5%a2%83%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5165\/","title":{"rendered":"mysql\u600e\u4e48\u6dfb\u52a0\u73af\u5883\u53d8\u91cf"},"content":{"rendered":"

\n \u901a\u8fc7\u4f7f\u7528 set \u547d\u4ee4\uff0c\u53ef\u4ee5\u5728 mysql \u4f1a\u8bdd\u4e2d\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u3002\u5177\u4f53\u6b65\u9aa4\u4e3a\uff1a\u6253\u5f00 mysql \u63a7\u5236\u53f0\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\uff1aset = \u9a8c\u8bc1\u73af\u5883\u53d8\u91cf\uff1aselect @@\u6ce8\u610f\uff1a\u73af\u5883\u53d8\u91cf\u4ec5\u5728\u5f53\u524d\u4f1a\u8bdd\u4e2d\u6709\u6548\uff0c\u4e0d\u4f1a\u6301\u4e45\u5b58\u50a8\u3002\n<\/p><\/blockquote>\n

\"mysql\u600e\u4e48\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 MySQL \u4e2d\u6dfb\u52a0\u73af\u5883\u53d8\u91cf<\/strong><\/p>\n

\u7b80\u4ecb<\/strong>
\u73af\u5883\u53d8\u91cf\u662f\u7cfb\u7edf\u6216\u7a0b\u5e8f\u53ef\u4ee5\u8bbf\u95ee\u7684\u7279\u5b9a\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u8bbe\u7f6e\u3002\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 SET \u547d\u4ee4\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

\u6b65\u9aa4<\/strong><\/p>\n

    \n
  1. \n

    \u6253\u5f00 MySQL \u63a7\u5236\u53f0<\/strong><\/p>\n

      \n
    • Linux\/macOS\uff1a -u -p<\/li>\n
    • Windows\uff1amysql -u -p <\/li>\n<\/ul>\n<\/li>\n
    • \n

      \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf<\/strong>
      \u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\uff1a<\/p>\n

      SET <\u53d8\u91cf\u540d> = <\u503c><\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4f8b\u5982\uff0c\u8981\u8bbe\u7f6e\u4e00\u4e2a\u540d\u4e3a my_env_variable \u7684\u73af\u5883\u53d8\u91cf\u503c\u4e3a test\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
      SET my_env_variable = 'test';<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
    • \n
      \u9a8c\u8bc1\u73af\u5883\u53d8\u91cf<\/strong>
      \u8981\u9a8c\u8bc1\u73af\u5883\u53d8\u91cf\u662f\u5426\u5df2\u6210\u529f\u8bbe\u7f6e\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
      SELECT @@<\u53d8\u91cf\u540d>;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4f8b\u5982\uff0c\u8981\u9a8c\u8bc1 my_env_variable \u7684\u503c\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
      SELECT @@my_env_variable;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
      \u793a\u4f8b<\/strong><\/p>\n
      \u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728 MySQL \u4e2d\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\uff1a<\/p>\n
      mysql> SET my_env_variable = 'test';\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @@my_env_variable;\n+--------------------+\n| @@my_env_variable |\n+--------------------+\n| test               |\n+--------------------+\n1 row in set (0.00 sec)<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u6ce8\u610f<\/strong><\/p>\n
        \n
      • \u73af\u5883\u53d8\u91cf\u5728 MySQL \u4f1a\u8bdd\u7684\u751f\u547d\u5468\u671f\u5185\u6709\u6548\u3002<\/li>\n
      • \u73af\u5883\u53d8\u91cf\u4e0d\u4f1a\u6301\u4e45\u5b58\u50a8\uff0c\u5f53\u4f1a\u8bdd\u7ed3\u675f\u65f6\uff0c\u5b83\u4eec\u5c06\u88ab\u5220\u9664\u3002<\/li>\n
      • \u53ef\u4ee5\u4f7f\u7528 UNSET \u547d\u4ee4\u5220\u9664\u73af\u5883\u53d8\u91cf\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\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":"
        \u901a\u8fc7\u4f7f\u7528 set \u547d\u4ee4\uff0c\u53ef\u4ee5\u5728 mysql \u4f1a\u8bdd\u4e2d\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u3002\u5177\u4f53\u6b65\u9aa4\u4e3a\uff1a\u6253\u5f00 mysql \u63a7\u5236\u53f0\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\uff1aset = \u9a8c\u8bc1\u73af\u5883\u53d8\u91cf\uff1aselect @@\u6ce8\u610f\uff1a\u73af\u5883\u53d8\u91cf\u4ec5\u5728\u5f53\u524d\u4f1a\u8bdd\u4e2d\u6709\u6548\uff0c\u4e0d\u4f1a\u6301\u4e45\u5b58\u50a8\u3002 \u5982\u4f55\u5728 MySQL \u4e2d\u6dfb\u52a0\u73af\u5883\u53d8\u91cf \u7b80\u4ecb\u73af\u5883\u53d8\u91cf\u662f\u7cfb\u7edf\u6216\u7a0b\u5e8f\u53ef\u4ee5\u8bbf\u95ee\u7684\u7279\u5b9a\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u8bbe\u7f6e\u3002\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 SET \u547d\u4ee4\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u3002 \u6b65\u9aa4 \u6253\u5f00 MySQL \u63a7\u5236\u53f0 Linux\/macOS\uff1a -u -p Windows\uff1amysql -u -p \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\uff1a SET <\u53d8\u91cf\u540d> = <\u503c> \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff0c\u8981\u8bbe\u7f6e\u4e00\u4e2a\u540d\u4e3a my_env_variable \u7684\u73af\u5883\u53d8\u91cf\u503c\u4e3a test\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a SET my_env_variable = ‘test’; \u767b\u5f55\u540e\u590d\u5236 \u9a8c\u8bc1\u73af\u5883\u53d8\u91cf\u8981\u9a8c\u8bc1\u73af\u5883\u53d8\u91cf\u662f\u5426\u5df2\u6210\u529f\u8bbe\u7f6e\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a SELECT @@<\u53d8\u91cf\u540d>; \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff0c\u8981\u9a8c\u8bc1 my_env_variable \u7684\u503c\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a SELECT @@my_env_variable; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b \u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728 […]<\/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-5165","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5165","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=5165"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5165\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}