{"id":79844,"date":"2024-10-16T13:36:14","date_gmt":"2024-10-16T05:36:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79844\/"},"modified":"2024-10-16T13:36:15","modified_gmt":"2024-10-16T05:36:15","slug":"mysql%e6%8c%87%e4%bb%a4-space%ef%bc%88%e7%a9%ba%e6%a0%bc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79844\/","title":{"rendered":"MySQL\u6307\u4ee4: SPACE()\uff08\u7a7a\u683c\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-space%ef%bc%88%e7%a9%ba%e6%a0%bc%ef%bc%89-KHlYwDPiKP\">MySQL\u6307\u4ee4: SPACE()\uff08\u7a7a\u683c\uff09<\/h1>\n<p>\u5728MySQL\u4e2d\uff0c<code>SPACE()<\/code>\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u51fd\u6578\uff0c\u4e3b\u8981\u7528\u65bc\u751f\u6210\u6307\u5b9a\u6578\u91cf\u7684\u7a7a\u683c\u5b57\u7b26\u3002\u9019\u500b\u51fd\u6578\u5728\u8655\u7406\u5b57\u7b26\u4e32\u6642\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u683c\u5f0f\u5316\u8f38\u51fa\u6216\u586b\u5145\u7a7a\u767d\u7684\u60c5\u6cc1\u4e0b\uff0c\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e<code>SPACE()<\/code>\u51fd\u6578\u7684\u7528\u6cd5\u3001\u61c9\u7528\u5834\u666f\u53ca\u5176\u793a\u4f8b\u3002<\/p>\n<h2 id=\"space%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-KHlYwDPiKP\">SPACE()\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>SPACE()<\/code>\u51fd\u6578\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u6709\u4e00\u500b\u53c3\u6578\uff1a<\/p>\n<pre><code>SPACE(N)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>N<\/code>\u662f\u8981\u751f\u6210\u7684\u7a7a\u683c\u6578\u91cf\u3002\u9019\u500b\u53c3\u6578\u5fc5\u9808\u662f\u4e00\u500b\u975e\u8ca0\u6574\u6578\u3002\u5982\u679c<code>N<\/code>\u70ba0\uff0c\u5247\u8fd4\u56de\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-KHlYwDPiKP\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>SPACE()<\/code>\u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1%ef%bc%9a%e7%94%9f%e6%88%90%e7%a9%ba%e6%a0%bc-KHlYwDPiKP\">\u7bc4\u4f8b1\uff1a\u751f\u6210\u7a7a\u683c<\/h3>\n<pre><code>SELECT SPACE(5) AS five_spaces;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u4e94\u500b\u7a7a\u683c\u5b57\u7b26\uff0c\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code>five_spaces\n     \n<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b2%ef%bc%9a%e8%88%87%e5%85%b6%e4%bb%96%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%b5%90%e5%90%88-KHlYwDPiKP\">\u7bc4\u4f8b2\uff1a\u8207\u5176\u4ed6\u5b57\u7b26\u4e32\u7d50\u5408<\/h3>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c<code>SPACE()<\/code>\u51fd\u6578\u7d93\u5e38\u8207\u5176\u4ed6\u5b57\u7b26\u4e32\u51fd\u6578\u7d50\u5408\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u4e4b\u9593\u63d2\u5165\u7a7a\u683c\uff1a<\/p>\n<pre><code>SELECT CONCAT('Hello', SPACE(3), 'World') AS greeting;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\uff1a<\/p>\n<pre><code>greeting\n&gt;Hello   World\n<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b3%ef%bc%9a%e6%a0%bc%e5%bc%8f%e5%8c%96%e8%bc%b8%e5%87%ba-KHlYwDPiKP\">\u7bc4\u4f8b3\uff1a\u683c\u5f0f\u5316\u8f38\u51fa<\/h3>\n<p>\u5728\u5831\u544a\u6216\u6578\u64da\u8f38\u51fa\u4e2d\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5c0d\u9f4a\u6587\u672c\u3002\u4f7f\u7528<code>SPACE()<\/code>\u51fd\u6578\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u9019\u4e00\u9ede\uff1a<\/p>\n<pre><code>SELECT CONCAT('Name:', SPACE(5), 'John Doe') AS formatted_output;<\/code><\/pre>\n<p>\u7d50\u679c\u5c07\u662f\uff1a<\/p>\n<pre><code>formatted_output\n&gt;Name:     John Doe\n<\/code><\/pre>\n<h2 id=\"%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-KHlYwDPiKP\">\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>SPACE()<\/code>\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u5ee3\u6cdb\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5831\u544a\uff1a<\/strong>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u4f7f\u7528\u7a7a\u683c\u4f86\u5c0d\u9f4a\u6578\u64da\uff0c\u4f7f\u5176\u66f4\u6613\u65bc\u95b1\u8b80\u3002<\/li>\n<li><strong>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\uff1a<\/strong>\u5728\u9700\u8981\u683c\u5f0f\u5316\u8f38\u51fa\u6642\uff0c\u63d2\u5165\u7a7a\u683c\u4ee5\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/li>\n<li><strong>\u7528\u6236\u754c\u9762\uff1a<\/strong>\u5728\u751f\u6210\u7528\u6236\u754c\u9762\u6642\uff0c\u4f7f\u7528\u7a7a\u683c\u4f86\u8abf\u6574\u5143\u7d20\u4e4b\u9593\u7684\u8ddd\u96e2\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-KHlYwDPiKP\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528<code>SPACE()<\/code>\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u50b3\u5165\u7684\u53c3\u6578<code>N<\/code>\u70ba\u8ca0\u6578\uff0cMySQL\u5c07\u8fd4\u56de\u932f\u8aa4\u3002<\/li>\n<li>\u751f\u6210\u7684\u7a7a\u683c\u5b57\u7b26\u4e0d\u6703\u5f71\u97ff\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KHlYwDPiKP\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684<code>SPACE()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u7c21\u55ae\u800c\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5b57\u7b26\u4e32\u8655\u7406\u548c\u6578\u64da\u683c\u5f0f\u5316\u65b9\u9762\u63d0\u9ad8\u6548\u7387\u3002\u7121\u8ad6\u662f\u5728\u751f\u6210\u5831\u544a\u3001\u683c\u5f0f\u5316\u8f38\u51fa\u9084\u662f\u8abf\u6574\u7528\u6236\u754c\u9762\uff0c<code>SPACE()<\/code>\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<code>VPS<\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u548c\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4SPACE()\uff0c\u7528\u4e8e\u751f\u6210\u6307\u5b9a\u6570\u91cf\u7684\u7a7a\u683c\u5b57\u7b26\uff0c\u4fbf\u4e8e\u683c\u5f0f\u5316\u8f93\u51fa\u548c\u6570\u636e\u5904\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-79844","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79844","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=79844"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79844\/revisions"}],"predecessor-version":[{"id":79845,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79844\/revisions\/79845"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}