{"id":503,"date":"2024-09-07T19:33:01","date_gmt":"2024-09-07T11:33:01","guid":{"rendered":"https:\/\/forelink.top\/?p=503"},"modified":"2024-09-07T19:33:02","modified_gmt":"2024-09-07T11:33:02","slug":"mysql%e8%a7%86%e5%9b%be","status":"publish","type":"post","link":"https:\/\/forelink.top\/index.php\/2024\/09\/07\/mysql%e8%a7%86%e5%9b%be\/","title":{"rendered":"MySQL\u89c6\u56fe"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"\u7b80\u4ecb\uff1a\">\u7b80\u4ecb\uff1a<\/h2>\n\n\n\n<p>MySQL 5.0\u7248\u672c\u4e4b\u540e\u5f15\u5165\u89c6\u56fe\u3002<\/p>\n\n\n\n<p>\u89c6\u56fe\u672c\u8eab\u662f\u4e00\u4e2a\u865a\u62df\u8868\uff0c\u4e0d\u5b58\u653e\u4efb\u4f55\u6570\u636e\u3002\u4f7f\u7528SQL\u8bed\u53e5\u8bbf\u95ee\u89c6\u56fe\u65f6\uff0c\u5b83\u8fd4\u56de\u7684\u6570\u636e\u90fd\u662f\u4ece\u5176\u4ed6\u8868\u91cc\u751f\u6210\u7684\u3002\u89c6\u56fe\u548c\u8868\u662f\u5728\u540c\u4e00\u4e2a\u547d\u540d\u7a7a\u95f4\uff0cMySQL\u5bf9\u4e8e\u4e8c\u8005\u5927\u591a\u662f\u540c\u6837\u5bf9\u5f85\u7684\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\u4e5f\u6709\u4e0d\u540c\uff0c\u4f8b\u5982\uff1a\u4e0d\u80fd\u5bf9\u89c6\u56fe\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u4e5f\u4e0d\u80fd\u4f7f\u7528DROP TABLE\u547d\u4ee4\u5220\u9664\u89c6\u56fe\u3002<\/p>\n\n\n\n<p>\u89c6\u56fe\u4e0d\u4ec5\u53ef\u4ee5\u7b80\u5316\u7528\u6237\u5bf9\u6570\u636e\u7684\u7406\u89e3\uff0c\u4e5f\u53ef\u4ee5\u7b80\u5316\u4ed6\u4eec\u7684\u64cd\u4f5c\u3002\n\u90a3\u4e9b\u88ab\u7ecf\u5e38\u4f7f\u7528\u7684\u67e5\u8be2\u53ef\u4ee5\u88ab\u5b9a\u4e49\u4e3a\u89c6\u56fe\uff0c\u4ece\u800c\u4f7f\u7528\u6237\u4e0d\u5fc5\u4e3a\u4e4b\u540e\u7684\u64cd\u4f5c\u6307\u5b9a\u5168\u90e8\u7684\u6761\u4ef6\u3002\u540c\u65f6\u901a\u8fc7\u89c6\u56fe\uff0c\u7528\u6237\u53ea\u80fd\u67e5\u8be2\u548c\u4fee\u6539\u6307\u5b9a\u7684\u6570\u636e\u3002\n\u4e14\u89c6\u56fe\u53ef\u5e2e\u52a9\u7528\u6237\u5c4f\u853d\u771f\u5b9e\u8868\u7ed3\u6784\u53d8\u5316\u5e26\u6765\u7684\u5f71\u54cd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u521b\u5efa\u89c6\u56fe\uff1a\">\u521b\u5efa\u89c6\u56fe\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE &#91;or replace] view &#91;view_name] as &#91;table];\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906205548245.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906205548245.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20240906205548245\"\/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u89c6\u56fe\u67e5\u8be2\uff1a\">\u89c6\u56fe\u67e5\u8be2\uff1a<\/h2>\n\n\n\n<p>\u89c6\u56fe\u662f\u4e00\u5f20\u865a\u62df\u5b58\u5728\u7684\u8868\u3002\u5927\u591a\u6570\u8868\u7684\u64cd\u4f5c\u4e5f\u53ef\u4ee5\u5bf9\u89c6\u56fe\u6267\u884c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906205759734.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906205759734.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20240906205759734\"\/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u89c6\u56fe\u4fee\u6539\uff1a\">\u89c6\u56fe\u4fee\u6539\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>alter view &#91;view_name] as &#91;table];\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906210443893.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906210443893.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20240906210443893\"\/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u89c6\u56fe\u5220\u9664\uff1a\">\u89c6\u56fe\u5220\u9664\uff1a<\/h2>\n\n\n\n<p>\u7136\u800c\u5220\u9664\u8868\u548c\u5220\u9664\u89c6\u56fe\u7684SQL\u8bed\u53e5\u662f\u4e0d\u76f8\u540c\u7684<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>drop view &#91;view_name];\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906210521339.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240906210521339.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20240906210521339\"\/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u89c6\u56fe\u68c0\u67e5\u9009\u9879\">\u89c6\u56fe\u68c0\u67e5\u9009\u9879<\/h2>\n\n\n\n<p>\u89c6\u56fe\u548c\u8868\u6709\u7ed1\u5b9a\u5173\u7cfb\uff0c\u5411\u89c6\u56fe\u4e2d\u6dfb\u52a0\u6570\u636e\uff0c\u540c\u65f6\u4e5f\u4f1a\u5411\u8868\u4e2d\u6dfb\u52a0\u6570\u636e\u3002\n\u4f46\u662f\u5982\u679c\u89c6\u56fe\u8868\u6709\u6761\u4ef6\uff0c\u6dfb\u52a0\u7684\u6570\u636e\u5982\u679c\u4e0d\u6ee1\u8db3\u6761\u4ef6\uff0c\u5728\u89c6\u56fe\u4e2d\u5219\u4e0d\u4f1a\u663e\u793a\u3002<\/p>\n\n\n\n<p>\u5f53\u4f7f\u7528\u68c0\u67e5\u9009\u9879\u5b57\u53e5\u521b\u5efa\u89c6\u56fe\u65f6\uff0cMySQL\u4f1a\u901a\u8fc7\u89c6\u56fe\u68c0\u67e5\u6b63\u5728\u66f4\u6539\u7684\u6bcf\u4e2a\u884c\u3002\u4ee5\u4f7f\u5176\u7b26\u5408\u89c6\u56fe\u7684\u5b9a\u4e49\u3002MySQL\u540c\u65f6\u5141\u8bb8\u57fa\u4e8e\u53e6\u4e00\u4e2a\u89c6\u56fe\u521b\u5efa\u89c6\u56fe\uff0c\u4e3a\u4e86\u786e\u5b9a\u68c0\u67e5\u7684\u8303\u56f4mysql\u63d0\u4f9b\u4e86 CASCADED(\u9ed8\u8ba4) \u548c LOCAL \u4e24\u4e2a\u9009\u9879\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"cascaded\">cascaded<\/h3>\n\n\n\n<p>\u5728\u89c6\u56fe\u521b\u5efa\u63d0\u4f9b\u4e86\u8bed\u6cd5 with cascaded check option\n\u5219\u5bf9\u8be5\u89c6\u56fe\u8fdb\u884c\u5199\u64cd\u4f5c\u65f6\uff0c\u4f1a\u5bf9\u5f53\u524d\u89c6\u56fe\u548c\u4f9d\u8d56\u7684\u6240\u6709\u89c6\u56fe\u8fdb\u884c\u68c0\u67e5\uff0c\u53ea\u6709\u6570\u636e\u5408\u6cd5\u65f6\uff0c\u624d\u80fd\u6dfb\u52a0\u6210\u529f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"local\">local<\/h3>\n\n\n\n<p>MySQL8.0 \u52a0\u5165\u3002\u4f1a\u68c0\u67e5\u5f53\u524d\u89c6\u56fe\u548c\u4f9d\u8d56\u7684\u6240\u6709\u89c6\u56fe\u3002\u53ea\u6709\u89c6\u56fe\u5b58\u5728\u68c0\u67e5\u9009\u9879\u65f6\uff0c\u624d\u5bf9\u89c6\u56fe\u4e2d\u7684\u6761\u4ef6\u8fdb\u884c\u68c0\u67e5\uff0c\u5426\u5219\u4e0d\u68c0\u67e5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u89c6\u56fe\u66f4\u65b0\uff1a\">\u89c6\u56fe\u66f4\u65b0\uff1a<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u6761\u4ef6\uff1a\">\u6761\u4ef6\uff1a<\/h3>\n\n\n\n<p>\u89c6\u56fe\u53ef\u66f4\u65b0\u7684\u6761\u4ef6\uff0c\u89c6\u56fe\u4e2d\u7684\u884c\u548c\u57fa\u7840\u8868\u7684\u884c\u4e4b\u95f4\u5fc5\u987b\u5b58\u5728\u4e00\u5bf9\u4e00\u7684\u5173\u7cfb\u3002<\/p>\n\n\n\n<p>\u5305\u542b\u4ee5\u4e0b\u4efb\u4f55\u4e00\u9879\u65f6\uff0c\u89c6\u56fe\u662f\u4e0d\u53ef\u66f4\u65b0\u7684\n\u805a\u5408\u51fd\u6570\u6216\u7a97\u53e3\u51fd\u6570\nDISTINCT\nGROUP BY\nHAVING\nUNION<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a MySQL 5.0\u7248\u672c\u4e4b\u540e\u5f15\u5165\u89c6\u56fe\u3002 \u89c6\u56fe\u672c\u8eab\u662f\u4e00\u4e2a\u865a\u62df\u8868\uff0c\u4e0d\u5b58\u653e\u4efb\u4f55\u6570\u636e\u3002\u4f7f\u7528SQL\u8bed\u53e5\u8bbf\u95ee\u89c6\u56fe\u65f6\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[42,39],"tags":[],"class_list":["post-503","post","type-post","status-publish","format-standard","hentry","category-mysql","category-39"],"_links":{"self":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/comments?post=503"}],"version-history":[{"count":1,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/503\/revisions"}],"predecessor-version":[{"id":504,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/503\/revisions\/504"}],"wp:attachment":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/media?parent=503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/categories?post=503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/tags?post=503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}