\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u6578\u64da\u63d0\u53d6\u6210\u70ba\u4e86\u4f01\u696d\u548c\u958b\u767c\u8005\u65e5\u5e38\u5de5\u4f5c\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u70ba\u4e86\u751f\u6210\u5831\u544a\u3001\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u9084\u662f\u70ba\u4e86\u652f\u6301\u61c9\u7528\u7a0b\u5e8f\u7684\u904b\u884c\uff0c\u638c\u63e1\u6709\u6548\u7684\u6578\u64da\u63d0\u53d6\u6280\u5de7\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u5206\u4eab\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u63d0\u53d6\u65b9\u6cd5\u548c\u6280\u5de7\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u9ad8\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u6578\u64da\u3002<\/p>\n
SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u8207\u6578\u64da\u5eab\u4ea4\u4e92\u7684\u4e3b\u8981\u5de5\u5177\u3002\u901a\u904e\u7de8\u5bebSQL\u67e5\u8a62\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u7279\u5b9a\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684SQL\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n
SELECT * FROM customers WHERE country = 'Hong Kong';<\/code><\/pre>\n\u9019\u689d\u67e5\u8a62\u5c07\u5f9e\u201ccustomers\u201d\u8868\u4e2d\u63d0\u53d6\u6240\u6709\u4f86\u81ea\u9999\u6e2f\u7684\u5ba2\u6236\u6578\u64da\u3002\u4f7f\u7528\u8005\u53ef\u4ee5\u6839\u64da\u9700\u8981\u4fee\u6539\u67e5\u8a62\u689d\u4ef6\uff0c\u4ee5\u7372\u53d6\u4e0d\u540c\u7684\u6578\u64da\u3002<\/p>\n
2. \u4f7f\u7528JOIN\u64cd\u4f5c<\/h2>\n
\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6578\u64da\u901a\u5e38\u5206\u6563\u5728\u591a\u500b\u8868\u4e2d\u3002\u4f7f\u7528JOIN\u64cd\u4f5c\u53ef\u4ee5\u5c07\u9019\u4e9b\u8868\u4e2d\u7684\u6578\u64da\u7d50\u5408\u8d77\u4f86\uff0c\u5f9e\u800c\u63d0\u53d6\u66f4\u5168\u9762\u7684\u4fe1\u606f\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT orders.order_id, customers.customer_name \nFROM orders \nJOIN customers ON orders.customer_id = customers.customer_id;<\/code><\/pre>\n\u9019\u689d\u67e5\u8a62\u5c07\u63d0\u53d6\u6240\u6709\u8a02\u55ae\u53ca\u5176\u5c0d\u61c9\u7684\u5ba2\u6236\u540d\u7a31\uff0c\u901a\u904eJOIN\u64cd\u4f5c\u5c07\u201corders\u201d\u548c\u201ccustomers\u201d\u8868\u9023\u63a5\u8d77\u4f86\u3002<\/p>\n
3. \u6578\u64da\u904e\u6ffe\u8207\u6392\u5e8f<\/h2>\n
\u5728\u63d0\u53d6\u6578\u64da\u6642\uff0c\u904e\u6ffe\u548c\u6392\u5e8f\u662f\u975e\u5e38\u91cd\u8981\u7684\u6b65\u9a5f\u3002\u4f7f\u7528WHERE\u5b50\u53e5\u53ef\u4ee5\u904e\u6ffe\u4e0d\u9700\u8981\u7684\u6578\u64da\uff0c\u800cORDER BY\u5b50\u53e5\u5247\u53ef\u4ee5\u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM products \nWHERE price < 100 \nORDER BY price ASC;<\/code><\/pre>\n\u9019\u689d\u67e5\u8a62\u5c07\u63d0\u53d6\u50f9\u683c\u4f4e\u65bc100\u7684\u6240\u6709\u7522\u54c1\uff0c\u4e26\u6309\u50f9\u683c\u5347\u5e8f\u6392\u5217\u3002<\/p>\n
4. \u4f7f\u7528\u805a\u5408\u51fd\u6578<\/h2>\n
\u805a\u5408\u51fd\u6578\u5982COUNT\u3001SUM\u3001AVG\u7b49\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u7528\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT COUNT(*) AS total_orders \nFROM orders \nWHERE order_date > '2023-01-01';<\/code><\/pre>\n\u9019\u689d\u67e5\u8a62\u5c07\u8a08\u7b97\u81ea2023\u5e741\u67081\u65e5\u4ee5\u4f86\u7684\u7e3d\u8a02\u55ae\u6578\u91cf\u3002<\/p>\n
5. \u6578\u64da\u5c0e\u51fa<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7528\u6236\u53ef\u80fd\u9700\u8981\u5c07\u63d0\u53d6\u7684\u6578\u64da\u5c0e\u51fa\u5230\u5176\u4ed6\u683c\u5f0f\uff0c\u5982CSV\u6216Excel\u3002\u8a31\u591a\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u90fd\u63d0\u4f9b\u4e86\u5c0e\u51fa\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5c0e\u51fa\u6578\u64da\uff1a<\/p>\n
SELECT * FROM customers \nINTO OUTFILE '\/tmp\/customers.csv' \nFIELDS TERMINATED BY ',' \nENCLOSED BY '\"' \nLINES TERMINATED BY 'n';<\/code><\/pre>\n\u9019\u689d\u547d\u4ee4\u5c07\u201ccustomers\u201d\u8868\u4e2d\u7684\u6578\u64da\u5c0e\u51fa\u5230CSV\u6587\u4ef6\u4e2d\uff0c\u65b9\u4fbf\u5f8c\u7e8c\u7684\u6578\u64da\u5206\u6790\u548c\u8655\u7406\u3002<\/p>\n
6. \u4f7f\u7528API\u9032\u884c\u6578\u64da\u63d0\u53d6<\/h2>\n
\u96a8\u8457\u96f2\u8a08\u7b97\u548c\u5fae\u670d\u52d9\u67b6\u69cb\u7684\u8208\u8d77\uff0c\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u63d0\u4f9b\u4e86API\u63a5\u53e3\u4f86\u63d0\u53d6\u6578\u64da\u3002\u901a\u904eHTTP\u8acb\u6c42\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u4f7f\u7528Python\u7684requests\u5eab\u4f86\u8abf\u7528API\uff1a<\/p>\n
import requests\n\nresponse = requests.get('https:\/\/api.example.com\/data')\ndata = response.json()<\/code><\/pre>\n\u9019\u6bb5\u4ee3\u78bc\u5c07\u5f9e\u6307\u5b9a\u7684API\u7372\u53d6\u6578\u64da\u4e26\u5c07\u5176\u8f49\u63db\u70baJSON\u683c\u5f0f\uff0c\u65b9\u4fbf\u5f8c\u7e8c\u8655\u7406\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u6578\u64da\u5eab\u6578\u64da\u63d0\u53d6\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\uff0c\u638c\u63e1\u5404\u7a2e\u63d0\u53d6\u6280\u5de7\u548c\u65b9\u6cd5\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u66f4\u9ad8\u6548\u5730\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528SQL\u67e5\u8a62\u3001JOIN\u64cd\u4f5c\uff0c\u9084\u662f\u901a\u904eAPI\u9032\u884c\u6578\u64da\u63d0\u53d6\uff0c\u4e86\u89e3\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u6216 \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u63a2\u7d22\u6709\u6548\u7684\u6578\u64da\u5eab\u6578\u64da\u63d0\u53d6\u6280\u5de7\u8207\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u9ad8\u6548\u63d0\u53d6\u548c\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\u80fd\u529b\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-187268","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187268","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=187268"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187268\/revisions"}],"predecessor-version":[{"id":187269,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187268\/revisions\/187269"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}