{"id":5878,"date":"2024-11-14T10:44:23","date_gmt":"2024-11-14T02:44:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5878\/"},"modified":"2024-11-14T10:44:23","modified_gmt":"2024-11-14T02:44:23","slug":"sql%e4%b8%8d%e7%ad%89%e4%ba%8e%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5878\/","title":{"rendered":"sql\u4e0d\u7b49\u4e8e\u600e\u4e48\u8868\u793a"},"content":{"rendered":"

\n sql \u4e2d\u8868\u793a\u4e0d\u7b49\u4e8e\u7684\u7b26\u53f7\u4e3a “!=”\uff0c\u5176\u4ed6\u65b9\u5f0f\u6709 “not equal to” \u548c “”\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u662f\u5426\u4e0d\u76f8\u540c\uff0c\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u3002\n<\/p><\/blockquote>\n

\"sql\u4e0d\u7b49\u4e8e\u600e\u4e48\u8868\u793a\u63d2\u56fe\"<\/p>\n

SQL \u4e0d\u7b49\u4e8e\u7684\u8868\u793a\u65b9\u5f0f<\/strong><\/p>\n

\u5728 SQL \u4e2d\uff0c\u4ee3\u8868\u4e0d\u7b49\u4e8e\u7684\u7b26\u53f7\u662f “!=”\u3002\u5b83\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u5e76\u786e\u5b9a\u5b83\u4eec\u662f\u5426\u4e0d\u76f8\u540c\u3002<\/p>\n

\u4f7f\u7528\u793a\u4f8b\uff1a<\/strong><\/p>\n

SELECT * FROM products WHERE price != 100;<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u6b64\u67e5\u8be2\u5c06\u9009\u62e9\u6240\u6709\u4ef7\u683c\u4e0d\u7b49\u4e8e 100 \u7684\u4ea7\u54c1\u3002<\/p>\n
\u5176\u4ed6\u65b9\u5f0f\uff1a<\/strong><\/p>\n
\u9664\u4e86 “!=” \u7b26\u53f7\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5728 SQL \u4e2d\u8868\u793a\u4e0d\u7b49\u4e8e\uff1a<\/p>\n
    \n
  •  NOT EQUAL TO\uff1a<\/strong>\u4f7f\u7528\u5173\u952e\u8bcd NOT EQUAL TO\uff0c\u53ef\u4ee5\u66f4\u660e\u786e\u5730\u8868\u793a\u4e0d\u7b49\u4e8e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ul>\n
    SELECT * FROM products WHERE price NOT EQUAL TO 100;<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    •  \uff1a<\/strong>\u4e00\u4e9b\u6570\u636e\u5e93\u7cfb\u7edf\u652f\u6301\u4f7f\u7528 \u7b26\u53f7\u8868\u793a\u4e0d\u7b49\u4e8e\uff0c\u4f46\u5b83\u4e0d\u5c5e\u4e8e SQL \u6807\u51c6\u3002<\/li>\n<\/ul>\n
      SELECT * FROM products WHERE price <> 100;<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
        \n
      • \u5728 SQL \u4e2d\uff0c\u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff0c\u56e0\u6b64 “!=”\u3001”” \u548c “NOT EQUAL TO” \u662f\u7b49\u4ef7\u7684\u3002<\/li>\n
      • \u5bf9\u4e8e\u5b57\u7b26\u4e32\u6bd4\u8f83\uff0c”!=” \u7b26\u53f7\u5c06\u6309\u5b57\u6bcd\u987a\u5e8f\u6bd4\u8f83\uff0c\u800c “” \u7b26\u53f7\u5c06\u6309\u4e8c\u8fdb\u5236\u4ee3\u7801\u6bd4\u8f83\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fsql\u4e0d\u7b49\u4e8e\u600e\u4e48\u8868\u793a\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 \u4e2d\u8868\u793a\u4e0d\u7b49\u4e8e\u7684\u7b26\u53f7\u4e3a “!=”\uff0c\u5176\u4ed6\u65b9\u5f0f\u6709 “not equal to” \u548c “”\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u662f\u5426\u4e0d\u76f8\u540c\uff0c\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u3002 SQL \u4e0d\u7b49\u4e8e\u7684\u8868\u793a\u65b9\u5f0f \u5728 SQL \u4e2d\uff0c\u4ee3\u8868\u4e0d\u7b49\u4e8e\u7684\u7b26\u53f7\u662f “!=”\u3002\u5b83\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u5e76\u786e\u5b9a\u5b83\u4eec\u662f\u5426\u4e0d\u76f8\u540c\u3002 \u4f7f\u7528\u793a\u4f8b\uff1a SELECT * FROM products WHERE price != 100; \u767b\u5f55\u540e\u590d\u5236 \u6b64\u67e5\u8be2\u5c06\u9009\u62e9\u6240\u6709\u4ef7\u683c\u4e0d\u7b49\u4e8e 100 \u7684\u4ea7\u54c1\u3002 \u5176\u4ed6\u65b9\u5f0f\uff1a \u9664\u4e86 “!=” \u7b26\u53f7\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5728 SQL \u4e2d\u8868\u793a\u4e0d\u7b49\u4e8e\uff1a NOT EQUAL TO\uff1a\u4f7f\u7528\u5173\u952e\u8bcd NOT EQUAL TO\uff0c\u53ef\u4ee5\u66f4\u660e\u786e\u5730\u8868\u793a\u4e0d\u7b49\u4e8e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a SELECT * FROM products WHERE price NOT EQUAL TO 100; \u767b\u5f55\u540e\u590d\u5236 \uff1a\u4e00\u4e9b\u6570\u636e\u5e93\u7cfb\u7edf\u652f\u6301\u4f7f\u7528 \u7b26\u53f7\u8868\u793a\u4e0d\u7b49\u4e8e\uff0c\u4f46\u5b83\u4e0d\u5c5e\u4e8e SQL \u6807\u51c6\u3002 SELECT […]<\/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-5878","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5878","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=5878"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5878\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}