{"id":152731,"date":"2024-11-02T01:33:20","date_gmt":"2024-11-01T17:33:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152731\/"},"modified":"2024-11-02T01:33:21","modified_gmt":"2024-11-01T17:33:21","slug":"%e5%b8%b8%e8%a6%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%88%86%e9%a0%81%e5%af%a6%e7%8f%be%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152731\/","title":{"rendered":"\u5e38\u898b\u6578\u64da\u5eab\u7684\u5206\u9801\u5be6\u73fe\u65b9\u6848"},"content":{"rendered":"

\u5e38\u898b\u6578\u64da\u5eab\u7684\u5206\u9801\u5be6\u73fe\u65b9\u6848<\/h1>\n

\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5206\u9801\u529f\u80fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u986f\u793a\u6578\u64da\u6210\u70ba\u4e86\u958b\u767c\u8005\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u5e38\u898b\u7684\u6578\u64da\u5eab\u5206\u9801\u5be6\u73fe\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u9078\u64c7\u6700\u9069\u5408\u7684\u6280\u8853\u3002<\/p>\n

1. OFFSET-FETCH \u5206\u9801<\/h2>\n

OFFSET-FETCH \u662f SQL \u6a19\u6e96\u7684\u4e00\u90e8\u5206\uff0c\u9069\u7528\u65bc\u5927\u591a\u6578\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff0c\u5982 MySQL\u3001PostgreSQL \u548c SQL Server\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u904e\u6307\u5b9a\u8981\u8df3\u904e\u7684\u884c\u6578\uff08OFFSET\uff09\u548c\u8981\u8fd4\u56de\u7684\u884c\u6578\uff08FETCH\uff09\u4f86\u5be6\u73fe\u5206\u9801\u3002<\/p>\n

SELECT * FROM \u8868\u540d\nORDER BY \u5217\u540d\nOFFSET 10 ROWS\nFETCH NEXT 10 ROWS ONLY;<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u8a62\u5c07\u8df3\u904e\u524d 10 \u884c\uff0c\u7136\u5f8c\u8fd4\u56de\u63a5\u4e0b\u4f86\u7684 10 \u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u6578\u64da\u91cf\u975e\u5e38\u5927\u7684\u60c5\u6cc1\u4e0b\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u9700\u8981\u8a08\u7b97\u6240\u6709\u8df3\u904e\u7684\u884c\u3002<\/p>\n
2. LIMIT-OFFSET \u5206\u9801<\/h2>\n
\u5728 MySQL \u4e2d\uff0cLIMIT \u548c OFFSET \u4e5f\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u5206\u9801\u3002\u9019\u7a2e\u65b9\u6cd5\u8207 OFFSET-FETCH \u985e\u4f3c\uff0c\u4f46\u8a9e\u6cd5\u7565\u6709\u4e0d\u540c\u3002<\/p>\n
SELECT * FROM \u8868\u540d\nLIMIT 10 OFFSET 10;<\/code><\/pre>\n
\u9019\u88e1\u7684 LIMIT \u6307\u5b9a\u4e86\u8981\u8fd4\u56de\u7684\u884c\u6578\uff0c\u800c OFFSET \u5247\u6307\u5b9a\u4e86\u8981\u8df3\u904e\u7684\u884c\u6578\u3002\u9019\u7a2e\u65b9\u6cd5\u5728 MySQL \u4e2d\u975e\u5e38\u5e38\u898b\uff0c\u4e26\u4e14\u6613\u65bc\u7406\u89e3\u3002<\/p>\n
3. \u4f7f\u7528\u6e38\u6a19\u9032\u884c\u5206\u9801<\/h2>\n
\u6e38\u6a19\u662f\u4e00\u7a2e\u5728\u6578\u64da\u5eab\u4e2d\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\u7684\u65b9\u5f0f\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u9700\u8981\u9010\u6b65\u52a0\u8f09\u6578\u64da\u7684\u60c5\u6cc1\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n
DECLARE my_cursor CURSOR FOR\nSELECT * FROM \u8868\u540d;\n\nOPEN my_cursor;\n\nFETCH NEXT FROM my_cursor; -- \u7372\u53d6\u4e0b\u4e00\u884c\n<\/code><\/pre>\n
\u4f7f\u7528\u6e38\u6a19\u7684\u512a\u52e2\u5728\u65bc\u53ef\u4ee5\u9748\u6d3b\u5730\u63a7\u5236\u6578\u64da\u7684\u52a0\u8f09\uff0c\u4f46\u7f3a\u9ede\u662f\u76f8\u5c0d\u65bc\u5176\u4ed6\u65b9\u6cd5\uff0c\u6027\u80fd\u53ef\u80fd\u8f03\u4f4e\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n
4. \u57fa\u65bc ID \u7684\u5206\u9801<\/h2>\n
\u57fa\u65bc ID \u7684\u5206\u9801\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u5206\u9801\u65b9\u6cd5\uff0c\u7279\u5225\u9069\u5408\u65bc\u6578\u64da\u91cf\u5927\u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u4f7f\u7528\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff08\u5982\u4e3b\u9375\uff09\u4f86\u9032\u884c\u5206\u9801\uff0c\u800c\u4e0d\u662f\u4f7f\u7528 OFFSET\u3002<\/p>\n
SELECT * FROM \u8868\u540d\nWHERE id > \u4e0a\u4e00\u9801\u6700\u5f8c\u4e00\u500bID\nORDER BY id\nLIMIT 10;<\/code><\/pre>\n
\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u52e2\u5728\u65bc\u6027\u80fd\u66f4\u4f73\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u4e0d\u9700\u8981\u8a08\u7b97\u8df3\u904e\u7684\u884c\u6578\u3002\u9019\u5c0d\u65bc\u5927\u6578\u64da\u96c6\u4f86\u8aaa\uff0c\u80fd\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n
5. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5eab<\/h2>\n
\u8a31\u591a\u958b\u767c\u6846\u67b6\u548c ORM\uff08\u5c0d\u8c61\u95dc\u4fc2\u6620\u5c04\uff09\u5de5\u5177\u63d0\u4f9b\u4e86\u5167\u5efa\u7684\u5206\u9801\u529f\u80fd\uff0c\u9019\u4e9b\u5de5\u5177\u901a\u5e38\u6703\u5c01\u88dd\u4e0a\u8ff0\u7684\u5206\u9801\u908f\u8f2f\uff0c\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 Laravel \u7684 Eloquent ORM\uff0c\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u5206\u9801\uff1a<\/p>\n
$users = User::paginate(10);<\/code><\/pre>\n
\u9019\u6a23\u7684\u5c01\u88dd\u4e0d\u50c5\u7c21\u5316\u4e86\u4ee3\u78bc\uff0c\u9084\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u6578\u64da\u5eab\u7684\u5206\u9801\u5be6\u73fe\u65b9\u6848\u6709\u591a\u7a2e\u9078\u64c7\uff0c\u5305\u62ec OFFSET-FETCH\u3001LIMIT-OFFSET\u3001\u6e38\u6a19\u3001\u57fa\u65bc ID \u7684\u5206\u9801\u4ee5\u53ca\u4f7f\u7528\u7b2c\u4e09\u65b9\u5eab\u7b49\u3002\u6bcf\u7a2e\u65b9\u6cd5\u90fd\u6709\u5176\u512a\u7f3a\u9ede\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\uff0c\u57fa\u65bc ID \u7684\u5206\u9801\u901a\u5e38\u662f\u6700\u4f73\u9078\u64c7\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5e38\u898b\u6578\u64da\u5eab\u7684\u5206\u9801\u5be6\u73fe\u65b9\u6848\uff0c\u4e86\u89e3\u4e0d\u540c\u6280\u8853\u5982\u4f55\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\u8207\u7528\u6236\u9ad4\u9a57\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-152731","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152731","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=152731"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152731\/revisions"}],"predecessor-version":[{"id":152732,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152731\/revisions\/152732"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}