{"id":179810,"date":"2024-11-09T04:59:14","date_gmt":"2024-11-08T20:59:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179810\/"},"modified":"2024-11-09T04:59:15","modified_gmt":"2024-11-08T20:59:15","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e8%a9%a2-5-%e4%bd%8d%e6%95%b8%e6%95%b8%e6%93%9a%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e6%9f%a5%e8%a9%a2-5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179810\/","title":{"rendered":"\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da\uff1f (\u6578\u64da\u5eab\u600e\u9ebc\u67e5\u8a62 5 \u4f4d\u6578)"},"content":{"rendered":"

\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da\uff1f<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u67e5\u8a62\u7279\u5b9a\u683c\u5f0f\u7684\u6578\u64da\u662f\u4e00\u9805\u5e38\u898b\u7684\u4efb\u52d9\u3002\u7279\u5225\u662f\u7576\u6211\u5011\u9700\u8981\u67e5\u8a62 5 \u4f4d\u6578\u7684\u6578\u64da\u6642\uff0c\u9019\u53ef\u80fd\u6d89\u53ca\u5230\u591a\u7a2e\u6578\u64da\u985e\u578b\u548c\u67e5\u8a62\u689d\u4ef6\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u6709\u6548\u5730\u67e5\u8a62 5 \u4f4d\u6578\u7684\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u7406\u89e3 5 \u4f4d\u6578\u6578\u64da<\/h2>\n

5 \u4f4d\u6578\u7684\u6578\u64da\u901a\u5e38\u6307\u7684\u662f\u4ecb\u65bc 10000 \u5230 99999 \u4e4b\u9593\u7684\u6574\u6578\u3002\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u9019\u985e\u6578\u64da\u53ef\u80fd\u5b58\u5132\u5728\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u4e2d\uff0c\u4f8b\u5982\u6574\u6578\uff08INT\uff09\u6216\u5b57\u7b26\uff08CHAR\uff09\u3002\u5728\u67e5\u8a62\u9019\u4e9b\u6578\u64da\u6642\uff0c\u6211\u5011\u9700\u8981\u8003\u616e\u5230\u6578\u64da\u7684\u985e\u578b\u4ee5\u53ca\u67e5\u8a62\u7684\u6548\u7387\u3002<\/p>\n

\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da\u7684\u57fa\u672c SQL \u8a9e\u6cd5<\/h2>\n

\u5728 SQL \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 SELECT<\/code> \u8a9e\u53e5\u4f86\u67e5\u8a62\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u67e5\u8a62\u7bc4\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba orders<\/code> \u7684\u8868\u683c\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u540d\u70ba order_id<\/code> \u7684\u6b04\u4f4d\uff0c\u6211\u5011\u5e0c\u671b\u67e5\u8a62\u6240\u6709 5 \u4f4d\u6578\u7684\u8a02\u55ae\u7de8\u865f\uff1a<\/p>\n

SELECT * FROM orders WHERE order_id BETWEEN 10000 AND 99999;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u8a9e\u53e5\u5c07\u8fd4\u56de\u6240\u6709 order_id<\/code> \u5728 10000 \u5230 99999 \u4e4b\u9593\u7684\u8a18\u9304\u3002<\/p>\n
\u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u53ef\u80fd\u4ee5\u5b57\u7b26\u5f62\u5f0f\u5b58\u5132\uff0c\u9019\u6642\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f\u4f86\u67e5\u8a62 5 \u4f4d\u6578\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 MySQL \u7684\u7bc4\u4f8b\uff1a<\/p>\n
SELECT * FROM orders WHERE order_id REGEXP '^[0-9]{5}$';<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u8a9e\u53e5\u5c07\u8fd4\u56de\u6240\u6709 order_id<\/code> \u70ba 5 \u4f4d\u6578\u7684\u8a18\u9304\u3002\u6b63\u5247\u8868\u9054\u5f0f ^[0-9]{5}$<\/code> \u7684\u610f\u601d\u662f\u5339\u914d\u6240\u6709\u7531 5 \u500b\u6578\u5b57\u7d44\u6210\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u67e5\u8a62\u6027\u80fd\u8003\u91cf<\/h2>\n
\u5728\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u78ba\u4fdd\u5728 order_id<\/code> \u6b04\u4f4d\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\uff1a<\/p>\n
CREATE INDEX idx_order_id ON orders(order_id);<\/code><\/pre>\n
\u6709\u4e86\u7d22\u5f15\u5f8c\uff0c\u6578\u64da\u5eab\u5728\u57f7\u884c\u67e5\u8a62\u6642\u53ef\u4ee5\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002<\/p>\n
\u7bc4\u4f8b\uff1a\u67e5\u8a62\u548c\u7d71\u8a08 5 \u4f4d\u6578\u6578\u64da<\/h2>\n
\u9664\u4e86\u67e5\u8a62 5 \u4f4d\u6578\u7684\u6578\u64da\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u9032\u884c\u4e00\u4e9b\u7d71\u8a08\u64cd\u4f5c\uff0c\u4f8b\u5982\u8a08\u7b97\u9019\u4e9b\u6578\u64da\u7684\u7e3d\u548c\u6216\u5e73\u5747\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff0c\u8a08\u7b97\u6240\u6709 5 \u4f4d\u6578\u7684\u8a02\u55ae\u91d1\u984d\u7e3d\u548c\uff1a<\/p>\n
SELECT SUM(amount) FROM orders WHERE order_id BETWEEN 10000 AND 99999;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u7b26\u5408\u689d\u4ef6\u7684\u8a02\u55ae\u91d1\u984d\u7684\u7e3d\u548c\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u67e5\u8a62 5 \u4f4d\u6578\u6578\u64da\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u4f7f\u7528\u9069\u7576\u7684 SQL \u8a9e\u6cd5\u548c\u8003\u616e\u6027\u80fd\u512a\u5316\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u57fa\u672c\u7684\u7bc4\u570d\u67e5\u8a62\u9084\u662f\u6b63\u5247\u8868\u9054\u5f0f\uff0c\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u67e5\u8a62\u6578\u64da\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 \u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u904b\u4f5c\uff0c\u63d0\u4f9b\u7a69\u5b9a\u7684\u4f3a\u670d\u5668\u74b0\u5883\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u8a625\u4f4d\u6578\u6578\u64da\uff0c\u638c\u63e1SQL\u8a9e\u53e5\u548c\u67e5\u8a62\u6280\u5de7\uff0c\u8f15\u9b06\u7372\u53d6\u6240\u9700\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-179810","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=179810"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179810\/revisions"}],"predecessor-version":[{"id":179811,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179810\/revisions\/179811"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}