{"id":6492,"date":"2024-11-14T08:24:17","date_gmt":"2024-11-14T00:24:17","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6492\/"},"modified":"2024-11-14T08:24:17","modified_gmt":"2024-11-14T00:24:17","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e6%80%8e%e4%b9%88%e5%88%a0%e9%99%a4%e5%88%97","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6492\/","title":{"rendered":"mysql\u6570\u636e\u5e93\u600e\u4e48\u5220\u9664\u5217"},"content":{"rendered":"

\n \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5728 mysql \u6570\u636e\u5e93\u4e2d\u5220\u9664\u5217\uff1a\u8fde\u63a5\u5230\u6570\u636e\u5e93\u3002\u9009\u62e9\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002\u4f7f\u7528 alter table \u8bed\u53e5\u5220\u9664\u5217\uff0c\u8bed\u6cd5\u4e3a\uff1aalter table table_name drop column column_name;\n<\/p><\/blockquote>\n

\"mysql\u6570\u636e\u5e93\u600e\u4e48\u5220\u9664\u5217\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 MySQL \u6570\u636e\u5e93\u4e2d\u5220\u9664\u5217<\/strong><\/p>\n

\u6b65\u9aa4 1\uff1a\u8fde\u63a5\u5230 MySQL<\/strong><\/p>\n

\u4f7f\u7528 MySQL \u5ba2\u6237\u7aef\u6216\u547d\u4ee4\u884c\u5de5\u5177\u8fde\u63a5\u5230\u6570\u636e\u5e93\u3002<\/p>\n

\u6b65\u9aa4 2\uff1a\u9009\u62e9\u6570\u636e\u5e93<\/strong><\/p>\n

\u4f7f\u7528 USE \u547d\u4ee4\u9009\u62e9\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002<\/p>\n

\u6b65\u9aa4 3\uff1a\u5220\u9664\u5217<\/strong><\/p>\n

\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u5220\u9664\u5217\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

ALTER TABLE table_name DROP COLUMN column_name;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • table_name \u662f\u8981\u4fee\u6539\u7684\u8868\u540d\u3002<\/li>\n
  • column_name \u662f\u8981\u5220\u9664\u7684\u5217\u540d\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b<\/strong><\/p>\n
    \u8981\u4ece customers \u8868\u4e2d\u5220\u9664 email \u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
    ALTER TABLE customers DROP COLUMN email;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n
      \n
    • \u5728\u5220\u9664\u5217\u4e4b\u524d\uff0c\u786e\u4fdd\u5217\u4e2d\u6ca1\u6709\u5b58\u50a8\u4efb\u4f55\u5173\u952e\u6570\u636e\u3002<\/li>\n
    • \u5220\u9664\u5217\u4f1a\u4ece\u8868\u4e2d\u6c38\u4e45\u5220\u9664\u6570\u636e\u3002<\/li>\n
    • \u5982\u679c\u5217\u4e0e\u5176\u4ed6\u8868\u4e2d\u7684\u5916\u952e\u76f8\u5173\u8054\uff0c\u5219\u9700\u8981\u9996\u5148\u5220\u9664\u5916\u952e\u7ea6\u675f\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u5e93\u600e\u4e48\u5220\u9664\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":"
      \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5728 mysql \u6570\u636e\u5e93\u4e2d\u5220\u9664\u5217\uff1a\u8fde\u63a5\u5230\u6570\u636e\u5e93\u3002\u9009\u62e9\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002\u4f7f\u7528 alter table \u8bed\u53e5\u5220\u9664\u5217\uff0c\u8bed\u6cd5\u4e3a\uff1aalter table table_name drop column column_name; \u5982\u4f55\u5728 MySQL \u6570\u636e\u5e93\u4e2d\u5220\u9664\u5217 \u6b65\u9aa4 1\uff1a\u8fde\u63a5\u5230 MySQL \u4f7f\u7528 MySQL \u5ba2\u6237\u7aef\u6216\u547d\u4ee4\u884c\u5de5\u5177\u8fde\u63a5\u5230\u6570\u636e\u5e93\u3002 \u6b65\u9aa4 2\uff1a\u9009\u62e9\u6570\u636e\u5e93 \u4f7f\u7528 USE \u547d\u4ee4\u9009\u62e9\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002 \u6b65\u9aa4 3\uff1a\u5220\u9664\u5217 \u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u5220\u9664\u5217\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a ALTER TABLE table_name DROP COLUMN column_name; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a table_name \u662f\u8981\u4fee\u6539\u7684\u8868\u540d\u3002 column_name \u662f\u8981\u5220\u9664\u7684\u5217\u540d\u3002 \u793a\u4f8b \u8981\u4ece customers \u8868\u4e2d\u5220\u9664 email \u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a ALTER TABLE customers DROP COLUMN email; […]<\/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-6492","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6492","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=6492"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6492\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}