{"id":77992,"date":"2024-10-16T11:24:42","date_gmt":"2024-10-16T03:24:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77992\/"},"modified":"2024-10-16T11:24:42","modified_gmt":"2024-10-16T03:24:42","slug":"mysql%e6%8c%87%e4%bb%a4-concat_ws%ef%bc%88%e5%b8%b6%e6%9c%89%e5%88%86%e9%9a%94%e7%ac%a6%e7%9a%84%e9%80%a3%e6%8e%a5%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77992\/","title":{"rendered":"MySQL\u6307\u4ee4: CONCAT_WS()\uff08\u5e36\u6709\u5206\u9694\u7b26\u7684\u9023\u63a5\u5b57\u7b26\u4e32\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-concat_ws%ef%bc%88%e5%b8%b6%e6%9c%89%e5%88%86%e9%9a%94%e7%ac%a6%e7%9a%84%e9%80%a3%e6%8e%a5%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%89-NupIfgdXjO\">MySQL\u6307\u4ee4: CONCAT_WS()\uff08\u5e36\u6709\u5206\u9694\u7b26\u7684\u9023\u63a5\u5b57\u7b26\u4e32\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u5b57\u7b26\u4e32\u64cd\u4f5c\u51fd\u6578\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39MySQL\u4e2d\u7684CONCAT_WS()\u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u7528\u65bc\u9023\u63a5\u5b57\u7b26\u4e32\u4e26\u6dfb\u52a0\u5206\u9694\u7b26\u7684\u5be6\u7528\u5de5\u5177\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afconcat_ws%e5%87%bd%e6%95%b8%ef%bc%9f-NupIfgdXjO\">\u4ec0\u9ebc\u662fCONCAT_WS()\u51fd\u6578\uff1f<\/h2>\n<p>CONCAT_WS()\u51fd\u6578\u7684\u5168\u540d\u662f\u201cConcatenate With Separator\u201d\uff0c\u5373\u201c\u5e36\u6709\u5206\u9694\u7b26\u7684\u9023\u63a5\u201d\u3002\u9019\u500b\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u591a\u500b\u5b57\u7b26\u4e32\u9023\u63a5\u5728\u4e00\u8d77\uff0c\u4e26\u5728\u5b83\u5011\u4e4b\u9593\u63d2\u5165\u6307\u5b9a\u7684\u5206\u9694\u7b26\u3002\u9019\u5728\u8655\u7406\u9700\u8981\u683c\u5f0f\u5316\u8f38\u51fa\u7684\u60c5\u6cc1\u4e0b\u7279\u5225\u6709\u7528\uff0c\u4f8b\u5982\u751f\u6210CSV\u683c\u5f0f\u7684\u6578\u64da\u6216\u5728\u5831\u544a\u4e2d\u986f\u793a\u591a\u500b\u5b57\u6bb5\u7684\u7d44\u5408\u3002<\/p>\n<h2 id=\"concat_ws%e7%9a%84%e8%aa%9e%e6%b3%95-NupIfgdXjO\">CONCAT_WS()\u7684\u8a9e\u6cd5<\/h2>\n<pre><code>CONCAT_WS(separator, string1, string2, ...)<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<strong>separator<\/strong>\u662f\u7528\u4f86\u5206\u9694\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6216\u5b57\u7b26\u4e32\uff0c\u800c<strong>string1, string2, &#8230;<\/strong>\u5247\u662f\u8981\u9023\u63a5\u7684\u5b57\u7b26\u4e32\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u4efb\u4f55\u5b57\u7b26\u4e32\u70baNULL\uff0c\u5247\u8a72\u5b57\u7b26\u4e32\u5c07\u88ab\u5ffd\u7565\uff0c\u800c\u4e0d\u6703\u5f71\u97ff\u5176\u4ed6\u5b57\u7b26\u4e32\u7684\u9023\u63a5\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-NupIfgdXjO\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528CONCAT_WS()\u51fd\u6578\u7684\u5e7e\u500b\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1%ef%bc%9a%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-NupIfgdXjO\">\u7bc4\u4f8b1\uff1a\u57fa\u672c\u7528\u6cd5<\/h3>\n<pre><code>SELECT CONCAT_WS('-', '2023', '10', '01') AS formatted_date;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de<strong>2023-10-01<\/strong>\uff0c\u5c07\u5e74\u4efd\u3001\u6708\u4efd\u548c\u65e5\u671f\u7528\u77ed\u6a6b\u7dda\u9023\u63a5\u8d77\u4f86\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2%ef%bc%9a%e8%99%95%e7%90%86null%e5%80%bc-NupIfgdXjO\">\u7bc4\u4f8b2\uff1a\u8655\u7406NULL\u503c<\/h3>\n<pre><code>SELECT CONCAT_WS(', ', 'Apple', NULL, 'Banana', 'Cherry') AS fruit_list;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de<strong>Apple, Banana, Cherry<\/strong>\uff0c\u56e0\u70baNULL\u503c\u88ab\u81ea\u52d5\u5ffd\u7565\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3%ef%bc%9a%e9%80%a3%e6%8e%a5%e5%a4%9a%e5%80%8b%e5%ad%97%e6%ae%b5-NupIfgdXjO\">\u7bc4\u4f8b3\uff1a\u9023\u63a5\u591a\u500b\u5b57\u6bb5<\/h3>\n<pre><code>SELECT CONCAT_WS(' ', first_name, last_name) AS full_name FROM users;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba<strong>users<\/strong>\u7684\u8868\uff0c\u5305\u542b<strong>first_name<\/strong>\u548c<strong>last_name<\/strong>\u5b57\u6bb5\u3002\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u7528\u7a7a\u683c\u9023\u63a5\u7684\u5168\u540d\u3002<\/p>\n<h2 id=\"concat_ws%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-NupIfgdXjO\">CONCAT_WS()\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>CONCAT_WS()\u51fd\u6578\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u751f\u6210\u5831\u544a\uff1a<\/strong>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528CONCAT_WS()\u4f86\u683c\u5f0f\u5316\u6578\u64da\uff0c\u4f7f\u5176\u66f4\u6613\u65bc\u95b1\u8b80\u3002<\/li>\n<li><strong>\u6578\u64da\u5c0e\u51fa\uff1a<\/strong>\u5728\u5c0e\u51fa\u6578\u64da\u5230CSV\u6216\u5176\u4ed6\u683c\u5f0f\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b64\u51fd\u6578\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u6b63\u78ba\u683c\u5f0f\u3002<\/li>\n<li><strong>\u7528\u6236\u754c\u9762\u986f\u793a\uff1a<\/strong>\u5728\u7528\u6236\u754c\u9762\u4e2d\u986f\u793a\u591a\u500b\u5b57\u6bb5\u7684\u7d44\u5408\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528CONCAT_WS()\u4f86\u7c21\u5316\u4ee3\u78bc\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NupIfgdXjO\">\u7e3d\u7d50<\/h2>\n<p>CONCAT_WS()\u662f\u4e00\u500b\u5f37\u5927\u7684MySQL\u51fd\u6578\uff0c\u80fd\u5920\u6709\u6548\u5730\u9023\u63a5\u591a\u500b\u5b57\u7b26\u4e32\u4e26\u6dfb\u52a0\u5206\u9694\u7b26\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5831\u544a\u3001\u6578\u64da\u5c0e\u51fa\u9084\u662f\u7528\u6236\u754c\u9762\u986f\u793a\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u500b\u51fd\u6578\u5c07\u5927\u5927\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4CONCAT_WS()\uff0c\u4f7f\u7528\u5206\u9694\u7b26\u9023\u63a5\u591a\u500b\u5b57\u7b26\u4e32\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u548c\u683c\u5f0f\u5316\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-77992","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77992","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=77992"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77992\/revisions"}],"predecessor-version":[{"id":77993,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77992\/revisions\/77993"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}