{"id":6355,"date":"2024-11-14T10:00:36","date_gmt":"2024-11-14T02:00:36","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6355\/"},"modified":"2024-11-14T10:00:36","modified_gmt":"2024-11-14T02:00:36","slug":"mysql%e5%8e%bb%e9%99%a4%e7%a9%ba%e6%a0%bc%e7%9a%84%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6355\/","title":{"rendered":"mysql\u53bb\u9664\u7a7a\u683c\u7684\u51fd\u6570"},"content":{"rendered":"<blockquote><p>\n  mysql\u63d0\u4f9b\u53bb\u9664\u5b57\u7b26\u4e32\u7a7a\u683c\u7684\u51fd\u6570\uff1a1. trim()\u53bb\u9664\u4e24\u7aef\u7a7a\u683c\uff1b2. ltrim()\u53bb\u9664\u5de6\u7aef\u7a7a\u683c\uff1b3. rtrim()\u53bb\u9664\u53f3\u7aef\u7a7a\u683c\uff1b4. replace()\u5c06\u7a7a\u683c\u66ff\u6362\u4e3a\u7a7a\u503c\u3002\u6839\u636e\u9700\u8981\u9009\u62e9\u76f8\u5e94\u51fd\u6570\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202408\/01\/2024080102492923260.jpg\" class=\"aligncenter\" title=\"mysql\u53bb\u9664\u7a7a\u683c\u7684\u51fd\u6570\u63d2\u56fe\" alt=\"mysql\u53bb\u9664\u7a7a\u683c\u7684\u51fd\u6570\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL \u53bb\u9664\u5b57\u7b26\u4e32\u7a7a\u683c\u7684\u51fd\u6570<\/strong><\/p>\n<p>MySQL \u63d0\u4f9b\u4e86\u51e0\u4e2a\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u53bb\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u7a7a\u683c\uff0c\u5305\u62ec\uff1a<\/p>\n<p><strong>1. TRIM() \u51fd\u6570<\/strong><\/p>\n<p>TRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\u3002<\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>SELECT TRIM('    Hello World    ');<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u679c\uff1a<\/strong><\/p>\n<pre>Hello World<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. LTRIM() \u51fd\u6570<\/strong><\/p>\n<p>LTRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u5de6\u7aef\u7684\u7a7a\u683c\u3002<\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>SELECT LTRIM('    Hello World');<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u679c\uff1a<\/strong><\/p>\n<pre>Hello World<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. RTRIM() \u51fd\u6570<\/strong><\/p>\n<p>RTRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u7aef\u7684\u7a7a\u683c\u3002<\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>SELECT RTRIM('Hello World    ');<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u679c\uff1a<\/strong><\/p>\n<pre>Hello World<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. REPLACE() \u51fd\u6570<\/strong><\/p>\n<p>REPLACE() \u51fd\u6570\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b50\u5b57\u7b26\u4e32\u66ff\u6362\u4e3a\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u53ef\u4ee5\u5229\u7528\u6b64\u51fd\u6570\u53bb\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u7a7a\u683c\u3002<\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>SELECT REPLACE('Hello World', ' ', '');<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u679c\uff1a<\/strong><\/p>\n<pre>HelloWorld<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u9009\u62e9\u4f7f\u7528\u54ea\u4e2a\u51fd\u6570\uff1f<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u9700\u8981\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528 TRIM() \u51fd\u6570\u3002<\/li>\n<li>\u5982\u679c\u4ec5\u9700\u8981\u53bb\u9664\u5b57\u7b26\u4e32\u5de6\u7aef\u6216\u53f3\u7aef\u7684\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528 LTRIM() \u6216 RTRIM() \u51fd\u6570\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u7a7a\u683c\u66ff\u6362\u4e3a\u7a7a\u767d\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528 REPLACE() \u51fd\u6570\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u53bb\u9664\u7a7a\u683c\u7684\u51fd\u6570\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql\u63d0\u4f9b\u53bb\u9664\u5b57\u7b26\u4e32\u7a7a\u683c\u7684\u51fd\u6570\uff1a1. trim()\u53bb\u9664\u4e24\u7aef\u7a7a\u683c\uff1b2. ltrim()\u53bb\u9664\u5de6\u7aef\u7a7a\u683c\uff1b3. rtrim()\u53bb\u9664\u53f3\u7aef\u7a7a\u683c\uff1b4. replace()\u5c06\u7a7a\u683c\u66ff\u6362\u4e3a\u7a7a\u503c\u3002\u6839\u636e\u9700\u8981\u9009\u62e9\u76f8\u5e94\u51fd\u6570\u3002 MySQL \u53bb\u9664\u5b57\u7b26\u4e32\u7a7a\u683c\u7684\u51fd\u6570 MySQL \u63d0\u4f9b\u4e86\u51e0\u4e2a\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u53bb\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u7a7a\u683c\uff0c\u5305\u62ec\uff1a 1. TRIM() \u51fd\u6570 TRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\u3002 \u7528\u6cd5\uff1a SELECT TRIM(&#8216; Hello World &#8216;); \u767b\u5f55\u540e\u590d\u5236 \u7ed3\u679c\uff1a Hello World \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 2. LTRIM() \u51fd\u6570 LTRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u5de6\u7aef\u7684\u7a7a\u683c\u3002 \u7528\u6cd5\uff1a SELECT LTRIM(&#8216; Hello World&#8217;); \u767b\u5f55\u540e\u590d\u5236 \u7ed3\u679c\uff1a Hello World \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 3. RTRIM() \u51fd\u6570 RTRIM() \u51fd\u6570\u4f1a\u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u7aef\u7684\u7a7a\u683c\u3002 \u7528\u6cd5\uff1a SELECT RTRIM(&#8216;Hello World &#8216;); \u767b\u5f55\u540e\u590d\u5236 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6355","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6355"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6355\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}