{"id":199688,"date":"2025-05-06T10:38:30","date_gmt":"2025-05-06T02:38:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199688\/"},"modified":"2025-05-06T10:38:30","modified_gmt":"2025-05-06T02:38:30","slug":"%e5%ae%9a%e4%b9%89mysql%e4%b8%ad%e7%9a%84%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199688\/","title":{"rendered":"\u5b9a\u4e49mysql\u4e2d\u7684\u53d8\u91cf"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5b9a\u4e49mysql\u4e2d\u7684\u53d8\u91cf<\/h1>\n<\/p>\n<p>MySQL\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5b83\u652f\u6301\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\u3002\u5728MySQL\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528SET\u8bed\u53e5\u6765\u5b9a\u4e49\u53d8\u91cf\uff0c\u5e76\u4f7f\u7528SELECT\u8bed\u53e5\u6765\u4f7f\u7528\u5df2\u5b9a\u4e49\u7684\u53d8\u91cf\u3002<\/p>\n<p>\u4e0b\u9762\u5c06\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u4ecb\u7ecd\u5982\u4f55\u5728MySQL\u4e2d\u8fdb\u884c\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\uff1a<\/p>\n<pre>mysql -u \u7528\u6237\u540d -p \u5bc6\u7801<\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u6d4b\u8bd5\u8868\uff0c\u7528\u6765\u6f14\u793a\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u540d\u4e3atest\u7684\u8868\uff1a<\/p>\n<pre>CREATE TABLE test (\n  id INT PRIMARY KEY,\n  name VARCHAR(50)\n);<\/pre>\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u53ef\u4ee5\u5f00\u59cb\u5b9a\u4e49\u53d8\u91cf\u4e86\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528SET\u8bed\u53e5\u6765\u5b9a\u4e49\u53d8\u91cf\uff0c\u5e76\u4f7f\u7528SELECT\u8bed\u53e5\u6765\u4f7f\u7528\u5df2\u5b9a\u4e49\u7684\u53d8\u91cf\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u6f14\u793a\u5982\u4f55\u5b9a\u4e49\u4e00\u4e2a\u6574\u578b\u53d8\u91cf\u548c\u4e00\u4e2a\u5b57\u7b26\u4e32\u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u503c\u63d2\u5165\u5230test\u8868\u4e2d\uff1a<\/p>\n<pre>-- \u5b9a\u4e49\u4e00\u4e2a\u6574\u578b\u53d8\u91cf\nSET @id := 1;\n\n-- \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u53d8\u91cf\nSET @name := 'test';\n\n-- \u5c06\u53d8\u91cf\u7684\u503c\u63d2\u5165\u5230test\u8868\u4e2d\nINSERT INTO test (id, name) VALUES (@id, @name);<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528SELECT\u8bed\u53e5\u6765\u9a8c\u8bc1\u53d8\u91cf\u7684\u503c\u662f\u5426\u6b63\u786e\u3002\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528SELECT\u8bed\u53e5\u6765\u67e5\u8be2\u53d8\u91cf\u7684\u503c\uff1a<\/p>\n<pre>-- \u67e5\u8be2\u6574\u578b\u53d8\u91cf\u7684\u503c\nSELECT @id;\n\n-- \u67e5\u8be2\u5b57\u7b26\u4e32\u53d8\u91cf\u7684\u503c\nSELECT @name;<\/pre>\n<p>\u9664\u4e86\u76f4\u63a5\u5b9a\u4e49\u53d8\u91cf\u5e76\u4f7f\u7528\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5728SELECT\u8bed\u53e5\u4e2d\u4f7f\u7528\u53d8\u91cf\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u6f14\u793a\u5982\u4f55\u5728SELECT\u8bed\u53e5\u4e2d\u4f7f\u7528\u53d8\u91cf\uff1a<\/p>\n<pre>-- \u4f7f\u7528\u53d8\u91cf\u67e5\u8be2test\u8868\u4e2did\u5927\u4e8e\u7b49\u4e8e\u53d8\u91cf\u503c\u7684\u8bb0\u5f55\nSELECT * FROM test WHERE id &gt;= @id;\n\n-- \u4f7f\u7528\u53d8\u91cf\u67e5\u8be2test\u8868\u4e2dname\u7b49\u4e8e\u53d8\u91cf\u503c\u7684\u8bb0\u5f55\nSELECT * FROM test WHERE name = @name;<\/pre>\n<p>\u5728MySQL\u4e2d\uff0c\u53d8\u91cf\u8fd8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u66f4\u65b0\u548c\u91cd\u65b0\u8d4b\u503c\u3002\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u66f4\u65b0\u53d8\u91cf\u7684\u503c\uff1a<\/p>\n<pre>-- \u66f4\u65b0\u6574\u578b\u53d8\u91cf\u7684\u503c\nSET @id := 2;\n\n-- \u66f4\u65b0\u5b57\u7b26\u4e32\u53d8\u91cf\u7684\u503c\nSET @name := 'new test';<\/pre>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230MySQL\u4e2d\u5982\u4f55\u8fdb\u884c\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\u3002\u901a\u8fc7\u4f7f\u7528\u53d8\u91cf\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u5728SQL\u8bed\u53e5\u4e2d\u4f7f\u7528\u548c\u4f20\u9012\u503c\uff0c\u63d0\u9ad8\u4e86SQL\u8bed\u53e5\u7684\u7075\u6d3b\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0cMySQL\u4e2d\u7684\u53d8\u91cf\u5b9a\u4e49\u548c\u4f7f\u7528\u53ef\u4ee5\u901a\u8fc7SET\u8bed\u53e5\u6765\u5b8c\u6210\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528SET\u8bed\u53e5\u5b9a\u4e49\u53d8\u91cf\uff0c\u5e76\u4f7f\u7528SELECT\u8bed\u53e5\u6765\u4f7f\u7528\u5df2\u5b9a\u4e49\u7684\u53d8\u91cf\u3002\u53d8\u91cf\u53ef\u4ee5\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528\uff0c\u4e5f\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u66f4\u65b0\u548c\u91cd\u65b0\u8d4b\u503c\u3002<\/p>\n<p>\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u7406\u89e3MySQL\u4e2d\u7684\u53d8\u91cf\u5b9a\u4e49\u548c\u4f7f\u7528\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5b9a\u4e49mysql\u4e2d\u7684\u53d8\u91cf\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9a\u4e49mysql\u4e2d\u7684\u53d8\u91cf MySQ&#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":[101],"tags":[],"class_list":["post-199688","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199688","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=199688"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199688\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}