{"id":177151,"date":"2024-11-08T13:46:24","date_gmt":"2024-11-08T05:46:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177151\/"},"modified":"2024-11-08T13:46:25","modified_gmt":"2024-11-08T05:46:25","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41065-sql%e7%8b%80%e6%85%8b%ef%bc%9ahy000%ef%bc%88er_empty_query%ef%bc%89%e6%9f%a5%e8%a9%a2%e7%82%ba%e7%a9%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177151\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41065 &#8211; SQL\u72c0\u614b\uff1aHY000\uff08ER_EMPTY_QUERY\uff09\u67e5\u8a62\u70ba\u7a7a"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41065-sql%e7%8b%80%e6%85%8b%ef%bc%9ahy000%ef%bc%88er_empty_query%ef%bc%89%e6%9f%a5%e8%a9%a2%e7%82%ba%e7%a9%ba-ScUzFMaZeZ\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41065 &#8211; SQL\u72c0\u614b\uff1aHY000\uff08ER_EMPTY_QUERY\uff09\u67e5\u8a62\u70ba\u7a7a<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa41065\uff0c\u8a72\u932f\u8aa4\u7684SQL\u72c0\u614b\u70baHY000\uff0c\u8868\u793a\u67e5\u8a62\u70ba\u7a7a\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u57f7\u884cSQL\u67e5\u8a62\u6642\uff0c\u7576\u67e5\u8a62\u5b57\u7b26\u4e32\u70ba\u7a7a\u6216\u672a\u6b63\u78ba\u69cb\u5efa\u6642\uff0cMySQL\u5c07\u7121\u6cd5\u57f7\u884c\u8a72\u67e5\u8a62\uff0c\u5f9e\u800c\u8fd4\u56de\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a41065%e7%9a%84%e5%8e%9f%e5%9b%a0-ScUzFMaZeZ\">\u932f\u8aa41065\u7684\u539f\u56e0<\/h2>\n<p>\u932f\u8aa41065\u7684\u4e3b\u8981\u539f\u56e0\u662f\u57f7\u884c\u7684SQL\u67e5\u8a62\u5b57\u7b26\u4e32\u70ba\u7a7a\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u9020\u6210\u7684\uff1a<\/p>\n<ul>\n<li><strong>\u8b8a\u91cf\u672a\u6b63\u78ba\u521d\u59cb\u5316\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u4f7f\u7528\u8b8a\u91cf\u4f86\u69cb\u5efa\u67e5\u8a62\uff0c\u4f46\u5982\u679c\u9019\u4e9b\u8b8a\u91cf\u672a\u88ab\u6b63\u78ba\u8ce6\u503c\uff0c\u5247\u67e5\u8a62\u5c07\u8b8a\u70ba\u7a7a\u3002<\/li>\n<li><strong>\u689d\u4ef6\u8a9e\u53e5\u672a\u6eff\u8db3\uff1a<\/strong>\u5728\u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5\uff08\u5982if\u8a9e\u53e5\uff09\u4f86\u6c7a\u5b9a\u662f\u5426\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u5982\u679c\u689d\u4ef6\u4e0d\u6210\u7acb\uff0c\u5247\u67e5\u8a62\u53ef\u80fd\u4e0d\u6703\u88ab\u57f7\u884c\u3002<\/li>\n<li><strong>\u67e5\u8a62\u69cb\u5efa\u908f\u8f2f\u932f\u8aa4\uff1a<\/strong>\u5728\u52d5\u614b\u751f\u6210\u67e5\u8a62\u6642\uff0c\u908f\u8f2f\u932f\u8aa4\u53ef\u80fd\u5c0e\u81f4\u6700\u7d42\u751f\u6210\u7684\u67e5\u8a62\u70ba\u7a7a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a41065-ScUzFMaZeZ\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41065<\/h2>\n<p>\u4fee\u5fa9MySQL\u932f\u8aa41065\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u6aa2\u67e5\u548c\u8abf\u8a66\u67e5\u8a62\u7684\u751f\u6210\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e5%ad%97%e7%ac%a6%e4%b8%b2-ScUzFMaZeZ\">1. \u6aa2\u67e5\u67e5\u8a62\u5b57\u7b26\u4e32<\/h3>\n<pre><code>let query = \"\"; \/\/ \u5047\u8a2d\u9019\u662f\u67e5\u8a62\u5b57\u7b26\u4e32\nif (someCondition) {\n    query = \"SELECT * FROM users\"; \/\/ \u6839\u64da\u689d\u4ef6\u69cb\u5efa\u67e5\u8a62\n}\nexecuteQuery(query); \/\/ \u57f7\u884c\u67e5\u8a62\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5982\u679c<code>someCondition<\/code>\u70ba\u5047\uff0c\u5247<code>query<\/code>\u5c07\u4fdd\u6301\u70ba\u7a7a\uff0c\u5c0e\u81f4\u932f\u8aa41065\u3002\u78ba\u4fdd\u5728\u57f7\u884c\u67e5\u8a62\u4e4b\u524d\uff0c\u67e5\u8a62\u5b57\u7b26\u4e32\u4e0d\u70ba\u7a7a\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e6%97%a5%e8%aa%8c%e8%a8%98%e9%8c%84-ScUzFMaZeZ\">2. \u4f7f\u7528\u65e5\u8a8c\u8a18\u9304<\/h3>\n<p>\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u4f7f\u7528\u65e5\u8a8c\u8a18\u9304\u53ef\u4ee5\u5e6b\u52a9\u8ffd\u8e64\u67e5\u8a62\u7684\u751f\u6210\u904e\u7a0b\u3002\u53ef\u4ee5\u5728\u57f7\u884c\u67e5\u8a62\u4e4b\u524d\u6253\u5370\u51fa\u67e5\u8a62\u5b57\u7b26\u4e32\uff0c\u4ee5\u4fbf\u6aa2\u67e5\u5176\u5167\u5bb9\uff1a<\/p>\n<pre><code>console.log(\"Executing query: \", query);\nexecuteQuery(query);\n<\/code><\/pre>\n<h3 id=\"3-%e9%a9%97%e8%ad%89%e8%ae%8a%e9%87%8f%e7%9a%84%e5%80%bc-ScUzFMaZeZ\">3. \u9a57\u8b49\u8b8a\u91cf\u7684\u503c<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u4f9d\u8cf4\u65bc\u8b8a\u91cf\uff0c\u8acb\u78ba\u4fdd\u9019\u4e9b\u8b8a\u91cf\u5728\u4f7f\u7528\u4e4b\u524d\u5df2\u6b63\u78ba\u8ce6\u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5\u4f86\u6aa2\u67e5\u8b8a\u91cf\u7684\u503c\uff1a<\/p>\n<pre><code>if (query) {\n    executeQuery(query);\n} else {\n    console.error(\"Query is empty!\");\n}\n<\/code><\/pre>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e6%9f%a5%e8%a9%a2%e9%82%8f%e8%bc%af-ScUzFMaZeZ\">4. \u6e2c\u8a66\u67e5\u8a62\u908f\u8f2f<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u662f\u52d5\u614b\u751f\u6210\u7684\uff0c\u8acb\u4ed4\u7d30\u6aa2\u67e5\u751f\u6210\u908f\u8f2f\uff0c\u78ba\u4fdd\u6240\u6709\u53ef\u80fd\u7684\u8def\u5f91\u90fd\u80fd\u751f\u6210\u6709\u6548\u7684\u67e5\u8a62\u3002\u53ef\u4ee5\u4f7f\u7528\u55ae\u5143\u6e2c\u8a66\u4f86\u9a57\u8b49\u67e5\u8a62\u751f\u6210\u7684\u6b63\u78ba\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-ScUzFMaZeZ\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u932f\u8aa41065\uff08ER_EMPTY_QUERY\uff09\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u5b57\u7b26\u4e32\u70ba\u7a7a\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u5b57\u7b26\u4e32\u3001\u4f7f\u7528\u65e5\u8a8c\u8a18\u9304\u3001\u9a57\u8b49\u8b8a\u91cf\u7684\u503c\u4ee5\u53ca\u6e2c\u8a66\u67e5\u8a62\u908f\u8f2f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u9019\u4e9b\u6b65\u9a5f\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u89e3\u6c7a\u7576\u524d\u7684\u554f\u984c\uff0c\u9084\u80fd\u63d0\u9ad8\u672a\u4f86\u958b\u767c\u904e\u7a0b\u4e2d\u7684\u4ee3\u78bc\u8cea\u91cf\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684\u6578\u64da\u5eab\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41065\uff08ER_EMPTY_QUERY\uff09\uff0c\u89e3\u6c7a\u67e5\u8a62\u70ba\u7a7a\u7684\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-177151","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177151","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=177151"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177151\/revisions"}],"predecessor-version":[{"id":177152,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177151\/revisions\/177152"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}