{"id":5656,"date":"2024-11-14T10:09:41","date_gmt":"2024-11-14T02:09:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5656\/"},"modified":"2024-11-14T10:09:41","modified_gmt":"2024-11-14T02:09:41","slug":"sql%e6%95%b0%e6%8d%ae%e5%ba%93%e9%87%8c%e9%9d%a2%e6%80%8e%e4%b9%88%e4%bf%ae%e6%94%b9","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5656\/","title":{"rendered":"sql\u6570\u636e\u5e93\u91cc\u9762\u600e\u4e48\u4fee\u6539"},"content":{"rendered":"

\u5982\u4f55\u4fee\u6539 sql \u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e<\/strong><\/p>\n

\u7b2c 1 \u6b65\uff1a\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/p>\n

\u4f7f\u7528 SQL \u5ba2\u6237\u7aef\u6216\u7ba1\u7406\u5de5\u5177\u8fde\u63a5\u5230\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002<\/p>\n

\u7b2c 2 \u6b65\uff1a\u7f16\u5199 UPDATE \u8bed\u53e5<\/strong><\/p>\n

\u4f7f\u7528 UPDATE \u8bed\u53e5\u66f4\u6539\u6570\u636e\u5e93\u4e2d\u8868\u7684\u8bb0\u5f55\u3002\u8be5\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u4e3a\uff1a<\/p>\n

UPDATE table_name\nSET column1 = new_value1, column2 = new_value2, ...\nWHERE condition;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • table_name \u662f\u8981\u4fee\u6539\u7684\u8868\u3002<\/li>\n
  • column1, column2 \u7b49\u662f\u9700\u8981\u4fee\u6539\u7684\u5217\u3002<\/li>\n
  • new_value1, new_value2 \u7b49\u662f\u8981\u8bbe\u7f6e\u7684\u65b0\u503c\u3002<\/li>\n
  • condition \u662f\u7528\u4e8e\u8fc7\u6ee4\u8bb0\u5f55\u7684\u53ef\u9009\u6761\u4ef6\u3002<\/li>\n<\/ul>\n
    \u7b2c 3 \u6b65\uff1a\u6267\u884c\u8bed\u53e5<\/strong><\/p>\n
    \u6267\u884c UPDATE \u8bed\u53e5\u4ee5\u4fee\u6539\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u4e4b\u4e00\uff1a<\/p>\n
      \n
    • \u5728 SQL \u5ba2\u6237\u7aef\u6216\u7ba1\u7406\u5de5\u5177\u4e2d\u8fd0\u884c\u8bed\u53e5\u3002<\/li>\n
    • \u4f7f\u7528\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684 SQL \u5e93\u6216 API \u6267\u884c\u8bed\u53e5\u3002<\/li>\n<\/ul>\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n
      \u8981\u4fee\u6539\u540d\u4e3a employees \u7684\u8868\u4e2d\u7684\u8bb0\u5f55\uff0c\u5c06\u5217 salary \u4e2d\u7684\u503c\u66f4\u65b0\u4e3a 10000\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b UPDATE \u8bed\u53e5\uff1a<\/p>\n
      UPDATE employees\nSET salary = 10000\nWHERE employee_id = 1;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u6267\u884c\u6b64\u8bed\u53e5\u5c06\u4fee\u6539 employee_id \u4e3a 1 \u7684\u5458\u5de5\u7684 salary \u503c\u3002<\/p>\n
      \u91cd\u8981\u63d0\u793a\uff1a<\/strong><\/p>\n
        \n
      • \u5728\u6267\u884c UPDATE \u8bed\u53e5\u4e4b\u524d\uff0c\u8bf7\u786e\u4fdd\u60a8\u6709\u8db3\u591f\u7684\u6743\u9650\u3002<\/li>\n
      • \u4ed4\u7ec6\u68c0\u67e5\u60a8\u7684\u6761\u4ef6\u4ee5\u786e\u4fdd\u53ea\u4fee\u6539\u9884\u671f\u7684\u8bb0\u5f55\u3002<\/li>\n
      • \u4fee\u6539\u5927\u91cf\u6570\u636e\u65f6\uff0c\u8bf7\u4f7f\u7528\u4e8b\u52a1\u4ee5\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002<\/li>\n
      • \u5b9a\u671f\u5907\u4efd\u60a8\u7684\u6570\u636e\u5e93\u4ee5\u9632\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fsql\u6570\u636e\u5e93\u91cc\u9762\u600e\u4e48\u4fee\u6539\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":"
        \u5982\u4f55\u4fee\u6539 sql \u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e \u7b2c 1 \u6b65\uff1a\u8fde\u63a5\u5230\u6570\u636e\u5e93 \u4f7f\u7528 SQL \u5ba2\u6237\u7aef\u6216\u7ba1\u7406\u5de5\u5177\u8fde\u63a5\u5230\u8981\u4fee\u6539\u7684\u6570\u636e\u5e93\u3002 \u7b2c 2 \u6b65\uff1a\u7f16\u5199 UPDATE \u8bed\u53e5 \u4f7f\u7528 UPDATE \u8bed\u53e5\u66f4\u6539\u6570\u636e\u5e93\u4e2d\u8868\u7684\u8bb0\u5f55\u3002\u8be5\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u4e3a\uff1a UPDATE table_name SET column1 = new_value1, column2 = new_value2, … WHERE condition; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a table_name \u662f\u8981\u4fee\u6539\u7684\u8868\u3002 column1, column2 \u7b49\u662f\u9700\u8981\u4fee\u6539\u7684\u5217\u3002 new_value1, new_value2 \u7b49\u662f\u8981\u8bbe\u7f6e\u7684\u65b0\u503c\u3002 condition \u662f\u7528\u4e8e\u8fc7\u6ee4\u8bb0\u5f55\u7684\u53ef\u9009\u6761\u4ef6\u3002 \u7b2c 3 \u6b65\uff1a\u6267\u884c\u8bed\u53e5 \u6267\u884c UPDATE \u8bed\u53e5\u4ee5\u4fee\u6539\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u4e4b\u4e00\uff1a \u5728 SQL \u5ba2\u6237\u7aef\u6216\u7ba1\u7406\u5de5\u5177\u4e2d\u8fd0\u884c\u8bed\u53e5\u3002 \u4f7f\u7528\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684 SQL \u5e93\u6216 API \u6267\u884c\u8bed\u53e5\u3002 […]<\/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-5656","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5656","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=5656"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5656\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}