{"id":5717,"date":"2024-11-14T13:55:23","date_gmt":"2024-11-14T05:55:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5717\/"},"modified":"2024-11-14T13:55:23","modified_gmt":"2024-11-14T05:55:23","slug":"sql%e5%a4%9a%e6%9d%a1%e4%bb%b6%e6%9f%a5%e8%af%a2%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5717\/","title":{"rendered":"sql\u591a\u6761\u4ef6\u67e5\u8be2\u600e\u4e48\u5199"},"content":{"rendered":"

\n sql \u591a\u6761\u4ef6\u67e5\u8be2\u4f7f\u7528\u591a\u4e2a\u6761\u4ef6\u7b5b\u9009\u6570\u636e\u3002\u8bed\u6cd5\uff1aselect column1, column2, … from table_name where condition1 and condition2 and …\u3002\u793a\u4f8b\uff1a\u67e5\u627e\u5c45\u4f4f\u5728\u52a0\u5dde\u3001\u540d\u79f0\u5305\u542b “john”\u3001\u5ba2\u6237 id \u5927\u4e8e 100 \u7684\u5ba2\u6237\u3002\u67e5\u8be2\uff1aselect customer_name from customers where city = ‘san francisco’ and customer_name like ‘%john%’ an\n<\/p><\/blockquote>\n

\"sql\u591a\u6761\u4ef6\u67e5\u8be2\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

SQL \u591a\u6761\u4ef6\u67e5\u8be2<\/strong><\/p>\n

\u591a\u6761\u4ef6\u67e5\u8be2\u662f\u6307\u5728\u4e00\u4e2a SQL \u8bed\u53e5\u4e2d\u4f7f\u7528\u591a\u4e2a\u6761\u4ef6\u6765\u7b5b\u9009\u6570\u636e\u3002<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

SELECT column1, column2, ...\nFROM table_name\nWHERE condition1 AND condition2 AND ...<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4f7f\u7528\u793a\u4f8b\uff1a<\/strong><\/p>\n
\u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3a “customers” \u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n
    \n
  • customer_id<\/li>\n
  • customer_name<\/li>\n
  • city<\/li>\n
  • state<\/li>\n<\/ul>\n
    \u67e5\u8be2\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\u7684\u5ba2\u6237\uff1a<\/strong><\/p>\n
      \n
    • \u5c45\u4f4f\u5728\u52a0\u5dde<\/li>\n
    • \u540d\u79f0\u5305\u542b “John”<\/li>\n
    • \u5ba2\u6237 ID \u5927\u4e8e 100<\/li>\n<\/ul>\n
      SQL \u67e5\u8be2\uff1a<\/strong><\/p>\n
      SELECT customer_name\nFROM customers\nWHERE city = 'San Francisco'\nAND customer_name LIKE '%John%'\nAND customer_id > 100;<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u89e3\u91ca\uff1a<\/strong><\/p>\n
        \n
      • \n
        WHERE \u5b50\u53e5\u6307\u5b9a\u4e86\u4e09\u4e2a\u6761\u4ef6\uff1a<\/p>\n
          \n
        • city = ‘San Francisco’\uff1a\u6307\u5b9a\u57ce\u5e02\u4e3a “San Francisco”\u3002<\/li>\n
        • customer_name LIKE ‘%John%’\uff1a\u6307\u5b9a\u5305\u542b “John” \u7684\u5ba2\u6237\u540d\u79f0\uff08\u4f7f\u7528\u901a\u914d\u7b26 %\uff09\u3002<\/li>\n
        • customer_id > 100\uff1a\u6307\u5b9a\u5ba2\u6237 ID \u5927\u4e8e 100\u3002<\/li>\n<\/ul>\n<\/li>\n
        • AND \u8fd0\u7b97\u7b26\u8fde\u63a5\u4e86\u8fd9\u4e9b\u6761\u4ef6\uff0c\u8868\u793a\u6240\u6709\u6761\u4ef6\u5fc5\u987b\u540c\u65f6\u4e3a\u771f\u624d\u80fd\u8fd4\u56de\u5339\u914d\u7684\u884c\u3002<\/li>\n<\/ul>\n
          \u5176\u4ed6\u8fd0\u7b97\u7b26\uff1a<\/strong><\/p>\n
          \u9664\u4e86 AND \u8fd0\u7b97\u7b26\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8fd0\u7b97\u7b26\u8fdb\u884c\u591a\u6761\u4ef6\u67e5\u8be2\uff1a<\/p>\n
            \n
          • OR\uff1a\u8fd4\u56de\u6ee1\u8db3\u4efb\u610f\u6761\u4ef6\u7684\u884c\u3002<\/li>\n
          • NOT\uff1a\u53cd\u8f6c\u6761\u4ef6\u3002<\/li>\n<\/ul>\n
            \u63d0\u793a\uff1a<\/strong><\/p>\n
              \n
            • \u4f7f\u7528\u62ec\u53f7\u6765\u7ec4\u5408\u590d\u6742\u6761\u4ef6\u3002<\/li>\n
            • \u4f7f\u7528\u901a\u914d\u7b26\uff08% \u548c _\uff09\u6765\u5339\u914d\u90e8\u5206\u5b57\u7b26\u4e32\u3002<\/li>\n
            • \u7d22\u5f15\u8868\u4ee5\u63d0\u9ad8\u591a\u6761\u4ef6\u67e5\u8be2\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n
              \u4ee5\u4e0a\u5c31\u662fsql\u591a\u6761\u4ef6\u67e5\u8be2\u600e\u4e48\u5199\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":"
              sql \u591a\u6761\u4ef6\u67e5\u8be2\u4f7f\u7528\u591a\u4e2a\u6761\u4ef6\u7b5b\u9009\u6570\u636e\u3002\u8bed\u6cd5\uff1aselect column1, column2, … from table_name where condition1 and condition2 and …\u3002\u793a\u4f8b\uff1a\u67e5\u627e\u5c45\u4f4f\u5728\u52a0\u5dde\u3001\u540d\u79f0\u5305\u542b “john”\u3001\u5ba2\u6237 id \u5927\u4e8e 100 \u7684\u5ba2\u6237\u3002\u67e5\u8be2\uff1aselect customer_name from customers where city = ‘san francisco’ and customer_name like ‘%john%’ an SQL \u591a\u6761\u4ef6\u67e5\u8be2 \u591a\u6761\u4ef6\u67e5\u8be2\u662f\u6307\u5728\u4e00\u4e2a SQL \u8bed\u53e5\u4e2d\u4f7f\u7528\u591a\u4e2a\u6761\u4ef6\u6765\u7b5b\u9009\u6570\u636e\u3002 \u8bed\u6cd5\uff1a SELECT column1, column2, … FROM table_name WHERE condition1 AND condition2 AND … \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u793a\u4f8b\uff1a \u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3a “customers” \u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u5217\uff1a customer_id […]<\/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-5717","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5717","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=5717"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5717\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}