{"id":47439,"date":"2023-12-11T15:11:50","date_gmt":"2023-12-11T07:11:50","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=47439"},"modified":"2023-12-11T15:11:50","modified_gmt":"2023-12-11T07:11:50","slug":"char%e5%92%8cvarchar%e7%9a%84%e5%8c%ba%e5%88%ab%ef%bc%9f-3","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/char%e5%92%8cvarchar%e7%9a%84%e5%8c%ba%e5%88%ab%ef%bc%9f-3\/","title":{"rendered":"char\u548cvarchar\u7684\u533a\u522b\uff1f"},"content":{"rendered":"

“`” char(n) \uff1a\u56fa\u5b9a\u957f\u5ea6\u7c7b\u578b\uff0c\u6bd4\u5982\u8ba2\u9605 char(10)\uff0c\u5f53\u4f60\u8f93\u5165””abc””\u4e09\u4e2a\u5b57\u7b26\u7684\u65f6\u5019\uff0c\u5b83\u4eec\u5360\u7684\u7a7a\u95f4\u8fd8\u662f 10 \u4e2a\u5b57\u8282\uff0c\u5176\u4ed6 7 \u4e2a\u662f\u7a7a\u5b57\u8282\u3002<\/p>\n

\u4f18\u70b9\uff1a\u6548\u7387\u9ad8\uff1b\u7f3a\u70b9\uff1a\u5360\u7528\u7a7a\u95f4\uff1b\u9002\u7528\u573a\u666f\uff1a\u5b58\u50a8\u5bc6\u7801\u7684 md5 \u503c\uff0c\u56fa\u5b9a\u957f\u5ea6\u7684\uff0c\u4f7f\u7528 char \u975e\u5e38\u5408\u9002\u3002<\/p>\n

<span style=""font-size: 1rem;"">varchar(n) \uff1a\u53ef\u53d8\u957f\u5ea6\uff0c\u5b58\u50a8\u7684\u503c\u662f\u6bcf\u4e2a\u503c\u5360\u7528\u7684\u5b57\u8282\u518d\u52a0\u4e0a\u4e00\u4e2a\u7528\u6765\u8bb0\u5f55\u5176\u957f\u5ea6\u7684\u5b57\u8282\u7684\u957f\u5ea6\u3002<\/span><\/p>\n

<span style=""font-size: 1rem;"">\u6240\u4ee5\uff0c\u4ece\u7a7a\u95f4\u4e0a\u8003\u8651 varcahr \u6bd4\u8f83\u5408\u9002\uff1b\u4ece\u6548\u7387\u4e0a\u8003\u8651 char \u6bd4\u8f83\u5408\u9002\uff0c\u4e8c\u8005\u4f7f\u7528\u9700\u8981\u6743\u8861\u3002<\/span><br><\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” char(n) \uff1a\u56fa\u5b9a\u957f\u5ea6\u7c7b\u578b\uff0c\u6bd4\u5982\u8ba2\u9605 char(10)\uff0c\u5f53\u4f60\u8f93\u5165&#822 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-47439","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=47439"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47439\/revisions"}],"predecessor-version":[{"id":47440,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47439\/revisions\/47440"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=47439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=47439"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=47439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}