{"id":144063,"date":"2024-11-01T04:02:31","date_gmt":"2024-10-31T20:02:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/144063\/"},"modified":"2024-11-01T04:02:32","modified_gmt":"2024-10-31T20:02:32","slug":"sql-%e6%9b%bf%e6%8f%9b%e5%ad%97%e6%ae%b5%e4%b8%ad%e7%9a%84%e7%a9%ba%e6%a0%bc%e7%9a%84%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/144063\/","title":{"rendered":"SQL \u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7a7a\u683c\u7684\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"sql-%e6%9b%bf%e6%8f%9b%e5%ad%97%e6%ae%b5%e4%b8%ad%e7%9a%84%e7%a9%ba%e6%a0%bc%e7%9a%84%e8%aa%9e%e5%8f%a5-KtjeIIUcTC\">SQL \u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7a7a\u683c\u7684\u8a9e\u53e5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7a7a\u683c\u7684\u8655\u7406\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\u3002\u7279\u5225\u662f\u5728\u4f7f\u7528 SQL \u8a9e\u8a00\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u66f4\u65b0\u6642\uff0c\u7a7a\u683c\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 SQL \u4e2d\u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7a7a\u683c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%9b%bf%e6%8f%9b%e7%a9%ba%e6%a0%bc-KtjeIIUcTC\">\u70ba\u4ec0\u9ebc\u9700\u8981\u66ff\u63db\u7a7a\u683c<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u7a7a\u683c\u53ef\u80fd\u51fa\u73fe\u5728\u591a\u500b\u5730\u65b9\uff0c\u4f8b\u5982\u7528\u6236\u8f38\u5165\u7684\u6578\u64da\u3001\u5c0e\u5165\u7684\u6578\u64da\u6587\u4ef6\u6216\u5f9e\u5176\u4ed6\u7cfb\u7d71\u9077\u79fb\u7684\u6578\u64da\u3002\u9019\u4e9b\u7a7a\u683c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u7d50\u679c\u4e0d\u6e96\u78ba\uff0c\u5f71\u97ff\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u4f8b\u5982\uff0c\u7576\u7528\u6236\u5728\u8f38\u5165\u59d3\u540d\u6642\uff0c\u53ef\u80fd\u6703\u4e0d\u5c0f\u5fc3\u5728\u540d\u5b57\u524d\u5f8c\u6dfb\u52a0\u7a7a\u683c\uff0c\u9019\u6703\u5c0e\u81f4\u67e5\u8a62\u6642\u7121\u6cd5\u6b63\u78ba\u5339\u914d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-%e6%9b%bf%e6%8f%9b%e7%a9%ba%e6%a0%bc%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-KtjeIIUcTC\">\u4f7f\u7528 SQL \u66ff\u63db\u7a7a\u683c\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u66ff\u63db\u5b57\u7b26\u4e32\u7684\u51fd\u6578\u901a\u5e38\u662f <code>REPLACE()<\/code>\u3002\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u6216\u5b57\u7b26\u4e32\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>REPLACE(string, old_string, new_string)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>string<\/code> \u662f\u8981\u9032\u884c\u66ff\u63db\u7684\u539f\u59cb\u5b57\u7b26\u4e32\uff0c<code>old_string<\/code> \u662f\u8981\u88ab\u66ff\u63db\u7684\u5b57\u7b26\u4e32\uff0c<code>new_string<\/code> \u662f\u7528\u4f86\u66ff\u63db\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%9b%bf%e6%8f%9b%e5%ad%97%e6%ae%b5%e4%b8%ad%e7%9a%84%e7%a9%ba%e6%a0%bc-KtjeIIUcTC\">\u793a\u4f8b\uff1a\u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7a7a\u683c<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u4e00\u500b <code>name<\/code> \u5b57\u6bb5\uff0c\u6211\u5011\u5e0c\u671b\u53bb\u9664\u8a72\u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u7a7a\u683c\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE users SET name = REPLACE(name, ' ', '');<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u6703\u628a <code>users<\/code> \u8868\u4e2d\u6240\u6709 <code>name<\/code> \u5b57\u6bb5\u7684\u7a7a\u683c\u66ff\u63db\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u5373\u522a\u9664\u6240\u6709\u7a7a\u683c\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e5%89%8d%e5%be%8c%e7%a9%ba%e6%a0%bc-KtjeIIUcTC\">\u8655\u7406\u524d\u5f8c\u7a7a\u683c<\/h2>\n<p>\u9664\u4e86\u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u7a7a\u683c\uff0c\u6709\u6642\u6211\u5011\u53ea\u9700\u8981\u53bb\u9664\u5b57\u6bb5\u524d\u5f8c\u7684\u7a7a\u683c\u3002\u9019\u53ef\u4ee5\u4f7f\u7528 <code>TRIM()<\/code> \u51fd\u6578\u4f86\u5be6\u73fe\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TRIM([LEADING | TRAILING | BOTH] string)<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u53bb\u9664 <code>name<\/code> \u5b57\u6bb5\u524d\u5f8c\u7684\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE users SET name = TRIM(name);<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e5%90%88%e4%bd%bf%e7%94%a8-replace-%e5%92%8c-trim-KtjeIIUcTC\">\u7d50\u5408\u4f7f\u7528 REPLACE \u548c TRIM<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u540c\u6642\u53bb\u9664\u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u7a7a\u683c\u4ee5\u53ca\u524d\u5f8c\u7684\u7a7a\u683c\u3002\u9019\u6642\u53ef\u4ee5\u7d50\u5408\u4f7f\u7528 <code>REPLACE()<\/code> \u548c <code>TRIM()<\/code> \u51fd\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE users SET name = TRIM(REPLACE(name, ' ', ''));<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u9996\u5148\u6703\u5c07 <code>name<\/code> \u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u7a7a\u683c\u66ff\u63db\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u7136\u5f8c\u518d\u53bb\u9664\u524d\u5f8c\u7684\u7a7a\u683c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KtjeIIUcTC\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u8655\u7406\u7a7a\u683c\u662f\u4e00\u500b\u91cd\u8981\u7684\u4efb\u52d9\uff0c\u5c24\u5176\u662f\u5728\u6578\u64da\u6e05\u7406\u548c\u6578\u64da\u6e96\u5099\u7684\u904e\u7a0b\u4e2d\u3002\u901a\u904e\u4f7f\u7528 <code>REPLACE()<\/code> \u548c <code>TRIM()<\/code> \u51fd\u6578\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u6e05\u7406\u6578\u64da\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u5b8c\u6574\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\uff0c\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u7ba1\u7406\u5176\u6578\u64da\u5eab\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u66ff\u63db\u5b57\u6bb5\u4e2d\u7684\u7a7a\u683c\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u7d50\u679c\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-144063","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144063","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=144063"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144063\/revisions"}],"predecessor-version":[{"id":144064,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144063\/revisions\/144064"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=144063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=144063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=144063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}