{"id":160179,"date":"2024-11-03T20:56:23","date_gmt":"2024-11-03T12:56:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160179\/"},"modified":"2024-11-03T20:56:24","modified_gmt":"2024-11-03T12:56:24","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-nchar-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160179\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase NCHAR \u6578\u64da\u985e\u578b"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-nchar-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-csMUsYIXBR\">OceanBase \u6559\u7a0b\uff1aOceanBase NCHAR \u6578\u64da\u985e\u578b<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9752\u775e\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684 NCHAR \u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u7279\u6027\u3001\u4f7f\u7528\u5834\u666f\u53ca\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h2 id=\"nchar-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-csMUsYIXBR\">NCHAR \u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>NCHAR \u662f OceanBase \u4e2d\u7684\u4e00\u7a2e\u5b57\u7b26\u6578\u64da\u985e\u578b\uff0c\u5c08\u9580\u7528\u65bc\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684 Unicode \u5b57\u7b26\u4e32\u3002\u9019\u610f\u5473\u8457\u7121\u8ad6\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u5982\u4f55\uff0cNCHAR \u90fd\u6703\u4f54\u7528\u76f8\u540c\u7684\u7a7a\u9593\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u4e00\u81f4\u6027\u548c\u53ef\u9810\u6e2c\u6027\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<h3 id=\"nchar-%e7%9a%84%e7%89%b9%e6%80%a7-csMUsYIXBR\">NCHAR \u7684\u7279\u6027<\/h3>\n<ul>\n<li><strong>\u56fa\u5b9a\u9577\u5ea6\uff1a<\/strong>\u6bcf\u500b NCHAR \u5b57\u6bb5\u7684\u9577\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u7684\u5b58\u53d6\u901f\u5ea6\u66f4\u5feb\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u53ef\u4ee5\u9810\u6e2c\u6bcf\u500b\u5b57\u6bb5\u7684\u5927\u5c0f\u3002<\/li>\n<li><strong>Unicode \u652f\u6301\uff1a<\/strong>NCHAR \u652f\u6301\u591a\u7a2e\u8a9e\u8a00\u7684\u5b57\u7b26\uff0c\u7279\u5225\u9069\u5408\u9700\u8981\u8655\u7406\u591a\u8a9e\u8a00\u6587\u672c\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u5b58\u5132\u6548\u7387\uff1a<\/strong>\u96d6\u7136 NCHAR \u4f54\u7528\u7684\u7a7a\u9593\u76f8\u5c0d\u8f03\u5927\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u56fa\u5b9a\u9577\u5ea6\u7684\u7279\u6027\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"nchar-%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-csMUsYIXBR\">NCHAR \u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<p>NCHAR \u6578\u64da\u985e\u578b\u7279\u5225\u9069\u5408\u4ee5\u4e0b\u5e7e\u7a2e\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u591a\u8a9e\u8a00\u61c9\u7528\uff1a<\/strong>\u5982\u679c\u61c9\u7528\u9700\u8981\u652f\u6301\u591a\u7a2e\u8a9e\u8a00\uff0c\u4f7f\u7528 NCHAR \u53ef\u4ee5\u78ba\u4fdd\u6240\u6709\u5b57\u7b26\u90fd\u80fd\u6b63\u78ba\u5b58\u5132\u548c\u986f\u793a\u3002<\/li>\n<li><strong>\u56fa\u5b9a\u9577\u5ea6\u6578\u64da\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u7684\u9577\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u4f8b\u5982\u8eab\u4efd\u8b49\u865f\u78bc\u6216\u5176\u4ed6\u7de8\u78bc\uff0c\u4f7f\u7528 NCHAR \u53ef\u4ee5\u7c21\u5316\u6578\u64da\u8655\u7406\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u5728\u9700\u8981\u9ad8\u6027\u80fd\u67e5\u8a62\u7684\u5834\u666f\u4e2d\uff0c\u56fa\u5b9a\u9577\u5ea6\u7684 NCHAR \u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"nchar-%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-csMUsYIXBR\">NCHAR \u7684\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 OceanBase \u4e2d\u5275\u5efa\u4e00\u500b\u5305\u542b NCHAR \u6578\u64da\u985e\u578b\u7684\u8868\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    name NCHAR(50),\n    email NCHAR(100)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e09\u500b\u5b57\u6bb5\uff1a<code>id<\/code>\u3001<code>name<\/code> \u548c <code>email<\/code>\u3002\u5176\u4e2d\uff0c<code>name<\/code> \u548c <code>email<\/code> \u5b57\u6bb5\u4f7f\u7528\u4e86 NCHAR \u6578\u64da\u985e\u578b\uff0c\u5206\u5225\u8a2d\u7f6e\u70ba 50 \u548c 100 \u7684\u56fa\u5b9a\u9577\u5ea6\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-csMUsYIXBR\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 NCHAR \u6578\u64da\u985e\u578b\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li><strong>\u7a7a\u9593\u4f54\u7528\uff1a<\/strong>\u7531\u65bc NCHAR \u662f\u56fa\u5b9a\u9577\u5ea6\u7684\uff0c\u7121\u8ad6\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u5982\u4f55\uff0c\u90fd\u6703\u4f54\u7528\u6307\u5b9a\u7684\u7a7a\u9593\u3002\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u6578\u64da\u8868\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u5408\u7406\u8a2d\u7f6e\u9577\u5ea6\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u985e\u578b\uff08\u5982 VARCHAR\uff09\u53ef\u80fd\u6703\u66f4\u6709\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u5b58\u5132\u9577\u5ea6\u4e0d\u4e00\u7684\u5b57\u7b26\u4e32\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-csMUsYIXBR\">\u7e3d\u7d50<\/h2>\n<p>NCHAR \u6578\u64da\u985e\u578b\u5728 OceanBase \u4e2d\u63d0\u4f9b\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u8655\u7406\u56fa\u5b9a\u9577\u5ea6\u7684 Unicode \u5b57\u7b26\u4e32\uff0c\u7279\u5225\u9069\u5408\u591a\u8a9e\u8a00\u61c9\u7528\u548c\u9700\u8981\u9ad8\u6027\u80fd\u67e5\u8a62\u7684\u5834\u666f\u3002\u901a\u904e\u5408\u7406\u8a2d\u8a08\u6578\u64da\u8868\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5145\u5206\u5229\u7528 NCHAR \u7684\u7279\u6027\u4f86\u63d0\u5347\u61c9\u7528\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 OceanBase NCHAR \u6578\u64da\u985e\u578b\u7684\u6559\u7a0b\uff0c\u4e86\u89e3\u5176\u7279\u6027\u3001\u7528\u6cd5\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\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-160179","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160179","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=160179"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160179\/revisions"}],"predecessor-version":[{"id":160180,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160179\/revisions\/160180"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160179"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}