{"id":158925,"date":"2024-11-03T09:57:19","date_gmt":"2024-11-03T01:57:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/158925\/"},"modified":"2024-11-03T09:57:20","modified_gmt":"2024-11-03T01:57:20","slug":"%e4%bd%95%e7%a8%ae%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%ef%bc%9f-%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adnchar%e6%98%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/158925\/","title":{"rendered":"\u4f55\u7a2e\u6578\u64da\u985e\u578b\uff1f (\u5728\u6578\u64da\u5eab\u4e2dnchar\u662f)"},"content":{"rendered":"<h1 id=\"%e4%bd%95%e7%a8%ae%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%ef%bc%9f-%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adnchar%e6%98%af-qhovWaoVqg\">\u4f55\u7a2e\u6578\u64da\u985e\u578b\uff1f (\u5728\u6578\u64da\u5eab\u4e2dnchar\u662f)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u9069\u7528\u65bc\u4e0d\u540c\u7684\u5834\u666f\uff0c\u5176\u4e2d <code>nchar<\/code> \u662f\u4e00\u7a2e\u7279\u5225\u7684\u5b57\u7b26\u6578\u64da\u985e\u578b\uff0c\u4e3b\u8981\u7528\u65bc\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>nchar<\/code> \u7684\u7279\u6027\u3001\u4f7f\u7528\u5834\u666f\u53ca\u5176\u8207\u5176\u4ed6\u6578\u64da\u985e\u578b\u7684\u6bd4\u8f03\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-nchar%ef%bc%9f-qhovWaoVqg\">\u4ec0\u9ebc\u662f nchar\uff1f<\/h2>\n<p><code>nchar<\/code> \u662f\u4e00\u7a2e\u7528\u65bc\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\u7684\u6578\u64da\u985e\u578b\u3002\u5b83\u7684\u4e3b\u8981\u7279\u9ede\u662f\u7121\u8ad6\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u662f\u591a\u5c11\uff0c\u6240\u4f54\u7528\u7684\u7a7a\u9593\u59cb\u7d42\u662f\u56fa\u5b9a\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5b9a\u7fa9\u4e86\u4e00\u500b <code>nchar(10)<\/code> \u7684\u5b57\u6bb5\uff0c\u5373\u4f7f\u53ea\u5b58\u5132\u4e865\u500b\u5b57\u7b26\uff0c\u8a72\u5b57\u6bb5\u4ecd\u7136\u6703\u4f54\u752810\u500b\u5b57\u7b26\u7684\u7a7a\u9593\uff0c\u5269\u9918\u7684\u7a7a\u9593\u6703\u7528\u7a7a\u683c\u586b\u5145\u3002<\/p>\n<h2 id=\"nchar-%e7%9a%84%e7%89%b9%e6%80%a7-qhovWaoVqg\">nchar \u7684\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u56fa\u5b9a\u9577\u5ea6\uff1a<\/strong>\u5982\u524d\u6240\u8ff0\uff0c<code>nchar<\/code> \u7684\u9577\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u9019\u610f\u5473\u8457\u7121\u8ad6\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u5982\u4f55\uff0c\u4f54\u7528\u7684\u7a7a\u9593\u59cb\u7d42\u4e0d\u8b8a\u3002<\/li>\n<li><strong>Unicode \u652f\u6301\uff1a<\/strong><code>nchar<\/code> \u652f\u6301Unicode\u5b57\u7b26\u96c6\uff0c\u9019\u4f7f\u5f97\u5b83\u80fd\u5920\u5b58\u5132\u591a\u7a2e\u8a9e\u8a00\u7684\u5b57\u7b26\uff0c\u7279\u5225\u9069\u5408\u9700\u8981\u591a\u8a9e\u8a00\u652f\u6301\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u7531\u65bc <code>nchar<\/code> \u7684\u56fa\u5b9a\u9577\u5ea6\u7279\u6027\uff0c\u6578\u64da\u5eab\u5728\u8655\u7406\u9019\u985e\u6578\u64da\u6642\u53ef\u4ee5\u66f4\u6709\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u6392\u5e8f\u548c\u6bd4\u8f03\u64cd\u4f5c\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"nchar-%e8%88%87%e5%85%b6%e4%bb%96%e5%ad%97%e7%ac%a6%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e6%af%94%e8%bc%83-qhovWaoVqg\">nchar \u8207\u5176\u4ed6\u5b57\u7b26\u6578\u64da\u985e\u578b\u7684\u6bd4\u8f03<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u9664\u4e86 <code>nchar<\/code>\uff0c\u9084\u6709\u5176\u4ed6\u5b57\u7b26\u6578\u64da\u985e\u578b\uff0c\u5982 <code>char<\/code> \u548c <code>varchar<\/code>\u3002\u4ee5\u4e0b\u662f\u9019\u4e9b\u6578\u64da\u985e\u578b\u7684\u6bd4\u8f03\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u6578\u64da\u985e\u578b<\/th>\n<th>\u9577\u5ea6<\/th>\n<th>Unicode \u652f\u6301<\/th>\n<th>\u7a7a\u9593\u4f7f\u7528<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>nchar<\/code><\/td>\n<td>\u56fa\u5b9a<\/td>\n<td>\u662f<\/td>\n<td>\u59cb\u7d42\u4f54\u7528\u5b9a\u7fa9\u7684\u9577\u5ea6<\/td>\n<\/tr>\n<tr>\n<td><code>char<\/code><\/td>\n<td>\u56fa\u5b9a<\/td>\n<td>\u5426<\/td>\n<td>\u59cb\u7d42\u4f54\u7528\u5b9a\u7fa9\u7684\u9577\u5ea6<\/td>\n<\/tr>\n<tr>\n<td><code>varchar<\/code><\/td>\n<td>\u53ef\u8b8a<\/td>\n<td>\u5426<\/td>\n<td>\u6839\u64da\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u800c\u8b8a\u5316<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-qhovWaoVqg\">\u4f7f\u7528\u5834\u666f<\/h2>\n<p><code>nchar<\/code> \u7279\u5225\u9069\u5408\u65bc\u4ee5\u4e0b\u5834\u666f\uff1a<\/p>\n<ul>\n<li>\u9700\u8981\u5b58\u5132\u591a\u8a9e\u8a00\u5b57\u7b26\u7684\u61c9\u7528\uff0c\u4f8b\u5982\u570b\u969b\u5316\u7684\u7db2\u7ad9\u6216\u61c9\u7528\u7a0b\u5e8f\u3002<\/li>\n<li>\u9700\u8981\u56fa\u5b9a\u9577\u5ea6\u7684\u6578\u64da\uff0c\u4f8b\u5982\u8eab\u4efd\u8b49\u865f\u78bc\u6216\u5176\u4ed6\u985e\u4f3c\u7684\u6a19\u8b58\u7b26\u3002<\/li>\n<li>\u5728\u6027\u80fd\u8981\u6c42\u8f03\u9ad8\u7684\u60c5\u6cc1\u4e0b\uff0c\u56e0\u70ba\u56fa\u5b9a\u9577\u5ea6\u7684\u6578\u64da\u5728\u6392\u5e8f\u548c\u6bd4\u8f03\u6642\u66f4\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-qhovWaoVqg\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0c<code>nchar<\/code> \u662f\u4e00\u7a2e\u5f37\u5927\u7684\u6578\u64da\u985e\u578b\uff0c\u9069\u5408\u65bc\u9700\u8981\u56fa\u5b9a\u9577\u5ea6\u548cUnicode\u652f\u6301\u7684\u5834\u666f\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u81f3\u95dc\u91cd\u8981\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u5b58\u5132\u548c\u8655\u7406\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684\u670d\u52d9\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>nchar\u662f\u4e00\u7a2e\u6578\u64da\u985e\u578b\uff0c\u7528\u65bc\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\uff0c\u9069\u5408\u591a\u8a9e\u8a00\u652f\u6301\u548c\u5b57\u7b26\u6578\u64da\u7684\u7ba1\u7406\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-158925","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158925","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=158925"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158925\/revisions"}],"predecessor-version":[{"id":158926,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158925\/revisions\/158926"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=158925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=158925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=158925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}