{"id":5551,"date":"2024-11-14T12:15:36","date_gmt":"2024-11-14T04:15:36","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5551\/"},"modified":"2024-11-14T12:15:36","modified_gmt":"2024-11-14T04:15:36","slug":"mysql%e6%80%8e%e4%b9%88%e6%9f%a5%e8%af%a2%e8%a1%a8%e4%b8%ad%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5551\/","title":{"rendered":"mysql\u600e\u4e48\u67e5\u8be2\u8868\u4e2d\u6570\u636e"},"content":{"rendered":"<blockquote><p>\n  \u4f7f\u7528 select \u8bed\u53e5\u3001where \u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4\u3001order by \u5b50\u53e5\u8fdb\u884c\u6392\u5e8f\u3001limit \u5b50\u53e5\u9650\u5236\u7ed3\u679c\u548c join \u8bed\u53e5\u8fde\u63a5\u8868\uff0c\u53ef\u4ee5\u67e5\u8be2 mysql \u8868\u4e2d\u6570\u636e\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/29\/2024052909302646781.jpg\" class=\"aligncenter\" title=\"mysql\u600e\u4e48\u67e5\u8be2\u8868\u4e2d\u6570\u636e\u63d2\u56fe\" alt=\"mysql\u600e\u4e48\u67e5\u8be2\u8868\u4e2d\u6570\u636e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 MySQL \u67e5\u8be2\u8868\u4e2d\u6570\u636e<\/strong><\/p>\n<p>\u5728 MySQL \u4e2d\u67e5\u8be2\u8868\u6570\u636e\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5e38\u7528\u7684\u51e0\u79cd\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u4f7f\u7528 SELECT \u8bed\u53e5<\/strong><\/p>\n<p>\u6700\u5e38\u7528\u7684\u67e5\u8be2\u65b9\u6cd5\u662f\u4f7f\u7528 SELECT \u8bed\u53e5\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>SELECT column_list\nFROM table_name\nWHERE condition;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u67e5\u8be2 customers \u8868\u4e2d\u6240\u6709\u5ba2\u6237\u7684\u4fe1\u606f\uff1a<\/p>\n<pre>SELECT *\nFROM customers;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 WHERE \u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4<\/strong><\/p>\n<p>WHERE \u5b50\u53e5\u53ef\u7528\u4e8e\u8fc7\u6ee4\u67e5\u8be2\u7ed3\u679c\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>WHERE condition;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u67e5\u8be2 orders \u8868\u4e2d\u4ef7\u683c\u9ad8\u4e8e 100 \u7f8e\u5143\u7684\u8ba2\u5355\uff1a<\/p>\n<pre>SELECT *\nFROM orders\nWHERE price &gt; 100;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 ORDER BY \u5b50\u53e5\u8fdb\u884c\u6392\u5e8f<\/strong><\/p>\n<p>ORDER BY \u5b50\u53e5\u53ef\u7528\u4e8e\u5bf9\u67e5\u8be2\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>ORDER BY column_name [ASC | DESC];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u6309\u5ba2\u6237\u59d3\u540d\u5bf9 customers \u8868\u4e2d\u7684\u5ba2\u6237\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\uff1a<\/p>\n<pre>SELECT *\nFROM customers\nORDER BY name ASC;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 LIMIT \u5b50\u53e5\u9650\u5236\u7ed3\u679c<\/strong><\/p>\n<p>LIMIT \u5b50\u53e5\u53ef\u7528\u4e8e\u9650\u5236\u67e5\u8be2\u7ed3\u679c\u7684\u6570\u91cf\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>LIMIT number;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u67e5\u8be2 products \u8868\u4e2d\u524d 10 \u4e2a\u4ea7\u54c1\uff1a<\/p>\n<pre>SELECT *\nFROM products\nLIMIT 10;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 JOIN \u8bed\u53e5\u8fde\u63a5\u8868<\/strong><\/p>\n<p>JOIN \u8bed\u53e5\u53ef\u7528\u4e8e\u8fde\u63a5\u8868\u5e76\u83b7\u53d6\u76f8\u5173\u6570\u636e\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>SELECT column_list\nFROM table1\nJOIN table2\nON join_condition;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u67e5\u8be2 customers \u8868\u548c orders \u8868\u4e2d\u7684\u5ba2\u6237\u548c\u8ba2\u5355\u4fe1\u606f\uff1a<\/p>\n<pre>SELECT *\nFROM customers\nJOIN orders\nON customers.id = orders.customer_id;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u67e5\u8be2\u8868\u4e2d\u6570\u636e\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>\u4f7f\u7528 select \u8bed\u53e5\u3001where \u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4\u3001order by \u5b50\u53e5\u8fdb\u884c\u6392\u5e8f\u3001limit \u5b50\u53e5\u9650\u5236\u7ed3\u679c\u548c join \u8bed\u53e5\u8fde\u63a5\u8868\uff0c\u53ef\u4ee5\u67e5\u8be2 mysql \u8868\u4e2d\u6570\u636e\u3002 \u5982\u4f55\u4f7f\u7528 MySQL \u67e5\u8be2\u8868\u4e2d\u6570\u636e \u5728 MySQL \u4e2d\u67e5\u8be2\u8868\u6570\u636e\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5e38\u7528\u7684\u51e0\u79cd\u65b9\u6cd5\uff1a \u4f7f\u7528 SELECT \u8bed\u53e5 \u6700\u5e38\u7528\u7684\u67e5\u8be2\u65b9\u6cd5\u662f\u4f7f\u7528 SELECT \u8bed\u53e5\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a SELECT column_list FROM table_name WHERE condition; \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff0c\u8981\u67e5\u8be2 customers \u8868\u4e2d\u6240\u6709\u5ba2\u6237\u7684\u4fe1\u606f\uff1a SELECT * FROM customers; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 WHERE \u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4 WHERE \u5b50\u53e5\u53ef\u7528\u4e8e\u8fc7\u6ee4\u67e5\u8be2\u7ed3\u679c\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a WHERE condition; \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff0c\u8981\u67e5\u8be2 orders \u8868\u4e2d\u4ef7\u683c\u9ad8\u4e8e 100 \u7f8e\u5143\u7684\u8ba2\u5355\uff1a SELECT * FROM orders [&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-5551","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5551","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=5551"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5551\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}