{"id":164589,"date":"2024-11-05T09:10:25","date_gmt":"2024-11-05T01:10:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164589\/"},"modified":"2024-11-05T09:10:26","modified_gmt":"2024-11-05T01:10:26","slug":"%e4%b9%9d%e5%80%8b%e7%90%86%e7%94%b1%e5%91%8a%e8%a8%b4%e4%bd%a0%ef%bc%8c%e7%82%ba%e4%bb%80%e9%ba%bc%e8%a6%81%e5%ad%b8%e7%bf%92sql","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164589\/","title":{"rendered":"\u4e5d\u500b\u7406\u7531\u544a\u8a34\u4f60\uff0c\u70ba\u4ec0\u9ebc\u8981\u5b78\u7fd2SQL"},"content":{"rendered":"

\u4e5d\u500b\u7406\u7531\u544a\u8a34\u4f60\uff0c\u70ba\u4ec0\u9ebc\u8981\u5b78\u7fd2SQL<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u5df2\u6210\u70ba\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u7684\u6838\u5fc3\u5de5\u5177\u3002\u7121\u8ad6\u4f60\u662f\u6578\u64da\u79d1\u5b78\u5bb6\u3001\u8edf\u4ef6\u958b\u767c\u4eba\u54e1\uff0c\u9084\u662f\u5546\u696d\u5206\u6790\u5e2b\uff0c\u5b78\u7fd2SQL\u90fd\u80fd\u70ba\u4f60\u7684\u8077\u696d\u751f\u6daf\u5e36\u4f86\u986f\u8457\u7684\u597d\u8655\u3002\u4ee5\u4e0b\u662f\u4e5d\u500b\u7406\u7531\uff0c\u544a\u8a34\u4f60\u70ba\u4ec0\u9ebc\u61c9\u8a72\u5b78\u7fd2SQL\u3002<\/p>\n

1. \u6578\u64da\u7ba1\u7406\u7684\u57fa\u790e<\/h2>\n

SQL\u662f\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u638c\u63e1SQL\u80fd\u8b93\u4f60\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u5eab\u7684\u904b\u4f5c\uff0c\u4e26\u80fd\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n

2. \u63d0\u9ad8\u5de5\u4f5c\u6548\u7387<\/h2>\n

\u4f7f\u7528SQL\u53ef\u4ee5\u5feb\u901f\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u901a\u904e\u7c21\u55ae\u7684\u67e5\u8a62\u8a9e\u53e5\uff0c\u4f60\u53ef\u4ee5\u5728\u5e7e\u79d2\u9418\u5167\u7372\u5f97\u5927\u91cf\u4fe1\u606f\uff0c\u800c\u4e0d\u5fc5\u624b\u52d5\u7be9\u9078\u6578\u64da\u3002<\/p>\n

SELECT * FROM customers WHERE country = 'Hong Kong';<\/code><\/pre>\n
3. \u6578\u64da\u5206\u6790\u80fd\u529b<\/h2>\n
SQL\u4e0d\u50c5\u50c5\u662f\u6578\u64da\u67e5\u8a62\u7684\u5de5\u5177\uff0c\u5b83\u9084\u80fd\u5e6b\u52a9\u4f60\u9032\u884c\u6578\u64da\u5206\u6790\u3002\u901a\u904e\u805a\u5408\u51fd\u6578\u548c\u5206\u7d44\u67e5\u8a62\uff0c\u4f60\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u898b\u89e3\u3002<\/p>\n
SELECT COUNT(*) FROM orders WHERE order_date >= '2023-01-01';<\/code><\/pre>\n
4. \u8de8\u5e73\u53f0\u517c\u5bb9\u6027<\/h2>\n
SQL\u662f\u4e00\u7a2e\u901a\u7528\u8a9e\u8a00\uff0c\u5e7e\u4e4e\u6240\u6709\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982MySQL\u3001PostgreSQL\u3001Oracle\u7b49\uff09\u90fd\u652f\u6301SQL\u3002\u9019\u610f\u5473\u8457\u4e00\u65e6\u4f60\u5b78\u6703\u4e86SQL\uff0c\u4f60\u5c31\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u9748\u6d3b\u904b\u7528\u3002<\/p>\n
5. \u8077\u696d\u767c\u5c55\u6a5f\u6703<\/h2>\n
\u96a8\u8457\u6578\u64da\u79d1\u5b78\u548c\u6578\u64da\u5206\u6790\u7684\u8208\u8d77\uff0c\u5c0dSQL\u6280\u80fd\u7684\u9700\u6c42\u4e0d\u65b7\u589e\u52a0\u3002\u638c\u63e1SQL\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u4f60\u7684\u8077\u696d\u7af6\u722d\u529b\uff0c\u4e26\u70ba\u4f60\u6253\u958b\u66f4\u591a\u7684\u8077\u696d\u767c\u5c55\u6a5f\u6703\u3002<\/p>\n
6. \u6578\u64da\u9a45\u52d5\u7684\u6c7a\u7b56<\/h2>\n
\u5728\u5546\u696d\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u9a45\u52d5\u7684\u6c7a\u7b56\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u5b78\u7fd2SQL\u80fd\u5e6b\u52a9\u4f60\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u898b\u89e3\uff0c\u652f\u6301\u696d\u52d9\u6c7a\u7b56\uff0c\u5f9e\u800c\u63d0\u9ad8\u4f01\u696d\u7684\u904b\u71df\u6548\u7387\u3002<\/p>\n
7. \u6578\u64da\u53ef\u8996\u5316\u7684\u57fa\u790e<\/h2>\n
\u8a31\u591a\u6578\u64da\u53ef\u8996\u5316\u5de5\u5177\uff08\u5982Tableau\u3001Power BI\u7b49\uff09\u90fd\u652f\u6301SQL\u67e5\u8a62\u3002\u5b78\u6703SQL\u5f8c\uff0c\u4f60\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u5c07\u6578\u64da\u53ef\u8996\u5316\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u5c55\u793a\u6578\u64da\u5206\u6790\u7d50\u679c\u3002<\/p>\n
8. \u793e\u5340\u652f\u6301\u548c\u8cc7\u6e90\u8c50\u5bcc<\/h2>\n
SQL\u64c1\u6709\u4e00\u500b\u9f90\u5927\u7684\u793e\u5340\uff0c\u63d0\u4f9b\u4e86\u5927\u91cf\u7684\u5b78\u7fd2\u8cc7\u6e90\u548c\u652f\u6301\u3002\u7121\u8ad6\u662f\u5728\u7dda\u8ab2\u7a0b\u3001\u66f8\u7c4d\u9084\u662f\u8ad6\u58c7\uff0c\u4f60\u90fd\u80fd\u627e\u5230\u8c50\u5bcc\u7684\u5b78\u7fd2\u6750\u6599\uff0c\u5e6b\u52a9\u4f60\u5feb\u901f\u638c\u63e1SQL\u3002<\/p>\n
9. \u81ea\u52d5\u5316\u548c\u8173\u672c\u7de8\u5beb<\/h2>\n
\u5b78\u7fd2SQL\u9084\u80fd\u5e6b\u52a9\u4f60\u81ea\u52d5\u5316\u6578\u64da\u8655\u7406\u4efb\u52d9\u3002\u901a\u904e\u7de8\u5bebSQL\u8173\u672c\uff0c\u4f60\u53ef\u4ee5\u5b9a\u671f\u57f7\u884c\u6578\u64da\u67e5\u8a62\u548c\u5831\u544a\u751f\u6210\uff0c\u5f9e\u800c\u7bc0\u7701\u6642\u9593\u548c\u7cbe\u529b\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5b78\u7fd2SQL\u4e0d\u50c5\u80fd\u63d0\u9ad8\u4f60\u7684\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u80fd\u529b\uff0c\u9084\u80fd\u70ba\u4f60\u7684\u8077\u696d\u751f\u6daf\u5e36\u4f86\u66f4\u591a\u6a5f\u6703\u3002\u7121\u8ad6\u4f60\u662f\u60f3\u9032\u4e00\u6b65\u767c\u5c55\u81ea\u5df1\u7684\u6280\u80fd\uff0c\u9084\u662f\u5e0c\u671b\u5728\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\u7acb\u8db3\uff0cSQL\u90fd\u662f\u4e00\u9805\u4e0d\u53ef\u6216\u7f3a\u7684\u6280\u80fd\u3002\u5982\u679c\u4f60\u5c0d\u65bc\u5982\u4f55\u5728\u9999\u6e2f\u7372\u5f97\u66f4\u597d\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u4f60\u5728\u6578\u64da\u7ba1\u7406\u4e0a\u66f4\u4e0a\u4e00\u5c64\u6a13\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u4e5d\u500b\u7406\u7531\uff0c\u70ba\u4ec0\u9ebc\u5b78\u7fd2SQL\u5c0d\u65bc\u6578\u64da\u5206\u6790\u3001\u8077\u696d\u767c\u5c55\u548c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u81f3\u95dc\u91cd\u8981\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-164589","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164589","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=164589"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164589\/revisions"}],"predecessor-version":[{"id":164590,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164589\/revisions\/164590"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}