{"id":177667,"date":"2024-11-08T16:03:23","date_gmt":"2024-11-08T08:03:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177667\/"},"modified":"2024-11-08T16:03:23","modified_gmt":"2024-11-08T08:03:23","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41204-sqlstate-hy000%ef%bc%88er_set_constants_only%ef%bc%89%e5%8f%aa%e8%83%bd%e4%bd%bf%e7%94%a8%e5%b8%b8%e9%87%8f%e8%a1%a8%e9%81%94","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177667\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41204 &#8211; SQLSTATE: HY000\uff08ER_SET_CONSTANTS_ONLY\uff09\u53ea\u80fd\u4f7f\u7528\u5e38\u91cf\u8868\u9054\u5f0f\u8207SET"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41204-sqlstate-hy000%ef%bc%88er_set_constants_only%ef%bc%89%e5%8f%aa%e8%83%bd%e4%bd%bf%e7%94%a8%e5%b8%b8%e9%87%8f%e8%a1%a8%e9%81%94-fEsoaqacYT\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41204 &#8211; SQLSTATE: HY000\uff08ER_SET_CONSTANTS_ONLY\uff09\u53ea\u80fd\u4f7f\u7528\u5e38\u91cf\u8868\u9054\u5f0f\u8207SET<\/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\u4fbf\u662f\u932f\u8aa4\u4ee3\u78bc1204\uff0c\u8a72\u932f\u8aa4\u7684SQLSTATE\u70baHY000\uff0c\u4e26\u4e14\u986f\u793a\u7684\u932f\u8aa4\u4fe1\u606f\u70ba\u201cER_SET_CONSTANTS_ONLY\uff1a\u53ea\u80fd\u4f7f\u7528\u5e38\u91cf\u8868\u9054\u5f0f\u8207SET\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528SET\u8a9e\u53e5\u6642\uff0c\u5c24\u5176\u662f\u5728\u5617\u8a66\u5c07\u8b8a\u91cf\u8ce6\u503c\u7d66\u4e00\u500b\u5e38\u91cf\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-fEsoaqacYT\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u7684SET\u8a9e\u53e5\u7528\u65bc\u70ba\u8b8a\u91cf\u8ce6\u503c\uff0c\u901a\u5e38\u7528\u65bc\u8a2d\u7f6e\u7528\u6236\u5b9a\u7fa9\u8b8a\u91cf\u6216\u7cfb\u7d71\u8b8a\u91cf\u3002\u7576\u4f60\u5617\u8a66\u4f7f\u7528SET\u8a9e\u53e5\u6642\uff0c\u5982\u679c\u4f60\u4f7f\u7528\u4e86\u4e0d\u88ab\u5141\u8a31\u7684\u8868\u9054\u5f0f\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa41204\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5617\u8a66\u5c07\u4e00\u500b\u975e\u5e38\u91cf\u8868\u9054\u5f0f\u8ce6\u503c\u7d66\u8b8a\u91cf\u3002<\/li>\n<li>\u5728SET\u8a9e\u53e5\u4e2d\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u8a9e\u6cd5\u3002<\/li>\n<li>\u4f7f\u7528\u4e86\u4e0d\u652f\u6301\u7684\u6578\u64da\u985e\u578b\u6216\u8868\u9054\u5f0f\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u78bc\u5c07\u5c0e\u81f4\u932f\u8aa41204\uff1a<\/p>\n<pre><code>SET @myVar = (SELECT COUNT(*) FROM myTable);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u56e0\u70baSELECT\u8a9e\u53e5\u8fd4\u56de\u7684\u662f\u4e00\u500b\u67e5\u8a62\u7d50\u679c\uff0c\u800c\u4e0d\u662f\u4e00\u500b\u5e38\u91cf\uff0c\u6240\u4ee5\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-fEsoaqacYT\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9MySQL\u932f\u8aa41204\uff0c\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u5728SET\u8a9e\u53e5\u4e2d\u4f7f\u7528\u7684\u8868\u9054\u5f0f\u662f\u5e38\u91cf\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e5%b8%b8%e9%87%8f%e5%80%bc-fEsoaqacYT\">1. \u4f7f\u7528\u5e38\u91cf\u503c<\/h3>\n<p>\u5982\u679c\u4f60\u53ea\u9700\u8981\u8a2d\u7f6e\u4e00\u500b\u5e38\u91cf\u503c\uff0c\u53ef\u4ee5\u76f4\u63a5\u5c07\u5e38\u91cf\u8ce6\u503c\u7d66\u8b8a\u91cf\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SET @myVar = 10;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8select-into%e8%aa%9e%e5%8f%a5-fEsoaqacYT\">2. \u4f7f\u7528SELECT INTO\u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u4f60\u9700\u8981\u5f9e\u67e5\u8a62\u4e2d\u7372\u53d6\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528SELECT INTO\u8a9e\u53e5\u4f86\u5c07\u67e5\u8a62\u7d50\u679c\u8ce6\u503c\u7d66\u8b8a\u91cf\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u932f\u8aa41204\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT COUNT(*) INTO @myVar FROM myTable;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u5beb\u6cd5\u53ef\u4ee5\u6b63\u78ba\u5730\u5c07\u67e5\u8a62\u7d50\u679c\u8ce6\u503c\u7d66\u8b8a\u91cf\uff0c\u800c\u4e0d\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e8%aa%9e%e6%b3%95-fEsoaqacYT\">3. \u6aa2\u67e5\u8a9e\u6cd5<\/h3>\n<p>\u78ba\u4fddSET\u8a9e\u53e5\u7684\u8a9e\u6cd5\u6b63\u78ba\uff0c\u4e26\u4e14\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u662f\u652f\u6301\u7684\u3002\u907f\u514d\u5728SET\u8a9e\u53e5\u4e2d\u4f7f\u7528\u4e0d\u5fc5\u8981\u7684\u8907\u96dc\u8868\u9054\u5f0f\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b-fEsoaqacYT\">\u5be6\u969b\u6848\u4f8b<\/h2>\n<p>\u5047\u8a2d\u4f60\u5728\u958b\u767c\u4e00\u500b\u61c9\u7528\u7a0b\u5e8f\uff0c\u9700\u8981\u8a08\u7b97\u67d0\u500b\u8868\u4e2d\u7684\u8a18\u9304\u6578\u91cf\u4e26\u5c07\u5176\u5b58\u5132\u5728\u8b8a\u91cf\u4e2d\u3002\u932f\u8aa4\u7684\u505a\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SET @recordCount = (SELECT COUNT(*) FROM users);<\/code><\/pre>\n<p>\u9019\u6703\u5c0e\u81f4\u932f\u8aa41204\u3002\u6b63\u78ba\u7684\u505a\u6cd5\u61c9\u8a72\u662f\uff1a<\/p>\n<pre><code>SELECT COUNT(*) INTO @recordCount FROM users;<\/code><\/pre>\n<p>\u9019\u6a23\u5c31\u80fd\u6b63\u78ba\u5730\u5c07\u7528\u6236\u6578\u91cf\u5b58\u5132\u5230@recordCount\u8b8a\u91cf\u4e2d\uff0c\u800c\u4e0d\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-fEsoaqacYT\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41204\uff08SQLSTATE: HY000\uff09\u901a\u5e38\u662f\u7531\u65bc\u5728SET\u8a9e\u53e5\u4e2d\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u8868\u9054\u5f0f\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u4f7f\u7528\u5e38\u91cf\u503c\u6216SELECT INTO\u8a9e\u53e5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u6b64\u932f\u8aa4\u3002\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u4fdd\u6301\u8a9e\u6cd5\u7684\u6b63\u78ba\u6027\u548c\u6578\u64da\u985e\u578b\u7684\u517c\u5bb9\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u9078\u64c7\u5408\u9069\u7684\u4e3b\u6a5f\u670d\u52d9\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41204\uff08SQLSTATE: HY000\uff09\u7684\u65b9\u6cd5\uff0c\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u4f7f\u7528\u5e38\u91cf\u8868\u9054\u5f0f\u8207SET\uff0c\u907f\u514d\u51fa\u73feER_SET_CONSTANTS_ONLY\u932f\u8aa4\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-177667","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177667","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=177667"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177667\/revisions"}],"predecessor-version":[{"id":177668,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177667\/revisions\/177668"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}