{"id":5689,"date":"2024-11-14T09:35:02","date_gmt":"2024-11-14T01:35:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5689\/"},"modified":"2024-11-14T09:35:02","modified_gmt":"2024-11-14T01:35:02","slug":"sql%e7%bc%96%e8%be%91%e6%95%b0%e6%8d%ae%e6%80%8e%e4%b9%88%e5%8a%a0%e4%b8%80%e5%88%97","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5689\/","title":{"rendered":"sql\u7f16\u8f91\u6570\u636e\u600e\u4e48\u52a0\u4e00\u5217"},"content":{"rendered":"

\n \u901a\u8fc7\u4f7f\u7528 alter table \u8bed\u53e5\uff0c\u53ef\u5728 sql \u4e2d\u5411\u73b0\u6709\u8868\u6dfb\u52a0\u4e00\u5217\u3002\u6b65\u9aa4\u5305\u62ec\uff1a\u8fde\u63a5\u6570\u636e\u5e93\u3001\u7f16\u5199 alter table \u8bed\u53e5\u3001\u6267\u884c\u8bed\u53e5\uff0c\u5e76\u9a8c\u8bc1\u6dfb\u52a0\u3002\n<\/p><\/blockquote>\n

\"sql\u7f16\u8f91\u6570\u636e\u600e\u4e48\u52a0\u4e00\u5217\u63d2\u56fe\"<\/p>\n

SQL \u4e2d\u6dfb\u52a0\u4e00\u5217<\/strong><\/p>\n

\u5728 SQL \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u5411\u73b0\u6709\u8868\u4e2d\u6dfb\u52a0\u4e00\u5217\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

ALTER TABLE table_name ADD column_name data_type;<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • table_name \u662f\u73b0\u6709\u8868\u7684\u540d\u79f0\u3002<\/li>\n
  • column_name \u662f\u8981\u6dfb\u52a0\u7684\u65b0\u5217\u7684\u540d\u79f0\u3002<\/li>\n
  • data_type \u662f\u65b0\u5217\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<\/ul>\n
    \u6b65\u9aa4\uff1a<\/strong><\/p>\n
      \n
    1.  \u8fde\u63a5\u5230\u6570\u636e\u5e93\uff1a<\/strong>\u4f7f\u7528 SQL \u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u5305\u542b\u8981\u4fee\u6539\u8868\u7684\u6570\u636e\u5e93\u3002<\/li>\n
    2.  \u4f7f\u7528 ALTER TABLE \u8bed\u53e5\uff1a<\/strong>\u7f16\u5199\u4e00\u4e2a ALTER TABLE \u8bed\u53e5\uff0c\u6307\u5b9a\u8981\u6dfb\u52a0\u7684\u5217\u7684\u540d\u79f0\u548c\u6570\u636e\u7c7b\u578b\u3002<\/li>\n
    3.  \u6267\u884c\u8bed\u53e5\uff1a<\/strong>\u5728 SQL \u5ba2\u6237\u7aef\u4e2d\u6267\u884c\u8bed\u53e5\u3002<\/li>\n
    4.  \u9a8c\u8bc1\u6dfb\u52a0\uff1a<\/strong>\u4f7f\u7528 DESC table_name \u8bed\u53e5\u67e5\u770b\u8868\u7684\u67b6\u6784\uff0c\u786e\u8ba4\u5df2\u6dfb\u52a0\u65b0\u5217\u3002<\/li>\n<\/ol>\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n
      \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a students \u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b id\u3001name \u548c age \u5217\u3002\u8981\u5411\u8868\u4e2d\u6dfb\u52a0 email \u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u53e5\uff1a<\/p>\n
      ALTER TABLE students ADD email VARCHAR(50);<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u6267\u884c\u6b64\u8bed\u53e5\u540e\uff0cstudents \u8868\u5c06\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n
        \n
      • id<\/li>\n
      • name<\/li>\n
      • age<\/li>\n
      • email<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fsql\u7f16\u8f91\u6570\u636e\u600e\u4e48\u52a0\u4e00\u5217\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":"
        \u901a\u8fc7\u4f7f\u7528 alter table \u8bed\u53e5\uff0c\u53ef\u5728 sql \u4e2d\u5411\u73b0\u6709\u8868\u6dfb\u52a0\u4e00\u5217\u3002\u6b65\u9aa4\u5305\u62ec\uff1a\u8fde\u63a5\u6570\u636e\u5e93\u3001\u7f16\u5199 alter table \u8bed\u53e5\u3001\u6267\u884c\u8bed\u53e5\uff0c\u5e76\u9a8c\u8bc1\u6dfb\u52a0\u3002 SQL \u4e2d\u6dfb\u52a0\u4e00\u5217 \u5728 SQL \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u5411\u73b0\u6709\u8868\u4e2d\u6dfb\u52a0\u4e00\u5217\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a ALTER TABLE table_name ADD column_name data_type; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a table_name \u662f\u73b0\u6709\u8868\u7684\u540d\u79f0\u3002 column_name \u662f\u8981\u6dfb\u52a0\u7684\u65b0\u5217\u7684\u540d\u79f0\u3002 data_type \u662f\u65b0\u5217\u7684\u6570\u636e\u7c7b\u578b\u3002 \u6b65\u9aa4\uff1a \u8fde\u63a5\u5230\u6570\u636e\u5e93\uff1a\u4f7f\u7528 SQL \u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u5305\u542b\u8981\u4fee\u6539\u8868\u7684\u6570\u636e\u5e93\u3002 \u4f7f\u7528 ALTER TABLE \u8bed\u53e5\uff1a\u7f16\u5199\u4e00\u4e2a ALTER TABLE \u8bed\u53e5\uff0c\u6307\u5b9a\u8981\u6dfb\u52a0\u7684\u5217\u7684\u540d\u79f0\u548c\u6570\u636e\u7c7b\u578b\u3002 \u6267\u884c\u8bed\u53e5\uff1a\u5728 SQL \u5ba2\u6237\u7aef\u4e2d\u6267\u884c\u8bed\u53e5\u3002 \u9a8c\u8bc1\u6dfb\u52a0\uff1a\u4f7f\u7528 DESC table_name \u8bed\u53e5\u67e5\u770b\u8868\u7684\u67b6\u6784\uff0c\u786e\u8ba4\u5df2\u6dfb\u52a0\u65b0\u5217\u3002 \u793a\u4f8b\uff1a \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a students \u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b id\u3001name \u548c […]<\/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-5689","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5689","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=5689"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5689\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}