{"id":2451,"date":"2025-03-07T22:48:46","date_gmt":"2025-03-07T14:48:46","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2451"},"modified":"2025-03-07T22:48:46","modified_gmt":"2025-03-07T14:48:46","slug":"mongodb-limit-%e4%b8%8e-skip-%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/07\/mongodb-limit-%e4%b8%8e-skip-%e6%96%b9%e6%b3%95\/","title":{"rendered":"MongoDB Limit \u4e0e Skip \u65b9\u6cd5"},"content":{"rendered":"\n

MongoDB limit()<\/code> \u4e0e skip()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n

\u5728 MongoDB \u67e5\u8be2\u4e2d\uff0climit()<\/code> \u548c skip()<\/code> \u4e3b\u8981\u7528\u4e8e\u5206\u9875\u67e5\u8be2<\/strong>\u548c\u9650\u5236\u8fd4\u56de\u7ed3\u679c<\/strong>\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u5e76\u51cf\u5c11\u670d\u52a1\u5668\u8d1f\u8f7d\u3002<\/p>\n\n\n\n

\n\n\n\n

1. limit(n)<\/code> \u9650\u5236\u67e5\u8be2\u7ed3\u679c\u6570\u91cf<\/strong><\/h2>\n\n\n\n

limit(n)<\/code> \u65b9\u6cd5\u7528\u4e8e\u9650\u5236\u67e5\u8be2\u7ed3\u679c\u7684\u6570\u91cf\uff0cn<\/code> \u4ee3\u8868\u8fd4\u56de\u7684\u6587\u6863\u6570\u91cf\u3002<\/p>\n\n\n\n

\u793a\u4f8b<\/strong><\/h3>\n\n\n\n

\u67e5\u8be2 products<\/code> \u96c6\u5408\u4e2d\u7684\u524d 5 \u6761\u6570\u636e<\/strong><\/h4>\n\n\n\n
db.products.find().limit(5)<\/code><\/pre>\n\n\n\n
\u67e5\u8be2 price<\/code> \u5927\u4e8e 50 \u7684\u5546\u54c1\uff0c\u6700\u591a\u8fd4\u56de 10 \u6761<\/strong><\/h4>\n\n\n\n
db.products.find({ price: { $gt: 50 } }).limit(10)<\/code><\/pre>\n\n\n\n
\n\n\n\n
2. skip(n)<\/code> \u8df3\u8fc7\u6307\u5b9a\u6570\u91cf\u7684\u6587\u6863<\/strong><\/h2>\n\n\n\n
skip(n)<\/code> \u65b9\u6cd5\u7528\u4e8e\u8df3\u8fc7\u524d n<\/code> \u6761\u67e5\u8be2\u7ed3\u679c\uff0c\u4ece\u800c\u5b9e\u73b0\u5206\u9875\u529f\u80fd\u3002<\/p>\n\n\n\n
\u793a\u4f8b<\/strong><\/h3>\n\n\n\n
\u8df3\u8fc7\u524d 5 \u6761\u6570\u636e\uff0c\u8fd4\u56de\u540e\u7eed\u7684\u6570\u636e<\/strong><\/h4>\n\n\n\n
db.products.find().skip(5)<\/code><\/pre>\n\n\n\n
\u67e5\u8be2 price<\/code> \u5927\u4e8e 50 \u7684\u5546\u54c1\uff0c\u8df3\u8fc7\u524d 10 \u6761\uff0c\u8fd4\u56de\u540e\u7eed\u7684 10 \u6761<\/strong><\/h4>\n\n\n\n
db.products.find({ price: { $gt: 50 } }).skip(10).limit(10)<\/code><\/pre>\n\n\n\n
\n\n\n\n
3. limit()<\/code> \u548c skip()<\/code> \u7528\u4e8e\u5206\u9875<\/strong><\/h2>\n\n\n\n
\u5728\u5206\u9875\u67e5\u8be2\u4e2d\uff1a<\/p>\n\n\n\n
    \n
  • limit(n)<\/code>: \u63a7\u5236\u6bcf\u9875\u663e\u793a\u7684\u6761\u6570<\/li>\n\n\n\n
  • skip(n)<\/code>: \u8df3\u8fc7\u524d n<\/code> \u6761\u6570\u636e<\/li>\n<\/ul>\n\n\n\n
    \u5047\u8bbe\uff1a<\/p>\n\n\n\n
      \n
    • \u6bcf\u9875\u663e\u793a pageSize = 10<\/code> \u6761\u6570\u636e<\/li>\n\n\n\n
    • \u5f53\u524d\u67e5\u8be2\u7684\u662f\u7b2c page = 3<\/code> \u9875<\/li>\n\n\n\n
    • \u8ba1\u7b97\u8df3\u8fc7\u7684\u6570\u636e\u91cf skipCount = (page - 1) * pageSize<\/code><\/li>\n<\/ul>\n\n\n\n
      \u793a\u4f8b<\/strong><\/h3>\n\n\n\n
      \u67e5\u8be2 products<\/code> \u96c6\u5408\u4e2d\u7b2c 3 \u9875\u6570\u636e<\/strong>\uff0c\u6bcf\u9875 10 \u6761\uff1a<\/p>\n\n\n\n
      db.products.find().skip((3 - 1) * 10).limit(10)<\/code><\/pre>\n\n\n\n
      \u6216\u8005\u76f4\u63a5\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
      db.products.find().skip(20).limit(10)<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      4. limit()<\/code>\u3001skip()<\/code> \u7ed3\u5408 sort()<\/code><\/strong><\/h2>\n\n\n\n
      \u901a\u5e38\uff0c\u5206\u9875\u67e5\u8be2\u9700\u8981\u6392\u5e8f<\/strong>\uff0c\u5426\u5219 skip()<\/code> \u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u987a\u5e8f\u4e0d\u7a33\u5b9a\u3002<\/p>\n\n\n\n
      \u793a\u4f8b<\/strong><\/h3>\n\n\n\n
      \u67e5\u8be2 products<\/code> \u96c6\u5408\u4e2d\u7b2c 2 \u9875\uff08\u6bcf\u9875 5 \u6761\uff09\uff0c\u6309 price<\/code> \u4ece\u9ad8\u5230\u4f4e\u6392\u5e8f\uff1a<\/p>\n\n\n\n
      db.products.find().sort({ price: -1 }).skip(5).limit(5)<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      5. limit()<\/code> \u4e0e skip()<\/code> \u7684\u6027\u80fd\u6ce8\u610f\u4e8b\u9879<\/strong><\/h2>\n\n\n\n
        \n
      • skip(n)<\/code> \u4f1a\u8df3\u8fc7 n<\/code> \u6761\u6570\u636e\uff0c\u6570\u636e\u91cf\u5927\u65f6\u53ef\u80fd\u5f71\u54cd\u67e5\u8be2\u6548\u7387\u3002<\/li>\n\n\n\n
      • limit(n)<\/code> \u9002\u7528\u4e8e\u51cf\u5c11\u8fd4\u56de\u6570\u636e\u91cf\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n\n\n\n
      • \u5728\u6570\u636e\u91cf\u8f83\u5927\u65f6\uff0c\u4f7f\u7528\u7d22\u5f15<\/strong>\u53ef\u4ee5\u4f18\u5316 skip()<\/code> \u6027\u80fd\uff0c\u5982 sort()<\/code> \u7ed3\u5408\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u67e5\u8be2\u3002<\/li>\n<\/ul>\n\n\n\n
        \u5982\u679c\u6570\u636e\u91cf\u5f88\u5927\uff0c\u6bd4\u5982\u9700\u8981\u8df3\u8fc7 10,000+<\/strong> \u6761\u8bb0\u5f55\uff0c\u63a8\u8350\u4f7f\u7528\u8303\u56f4\u67e5\u8be2<\/strong>\u66ff\u4ee3 skip()<\/code>\uff1a<\/p>\n\n\n\n
        db.products.find({ _id: { $gt: last_id } }).limit(10)<\/code><\/pre>\n\n\n\n
        \u5176\u4e2d last_id<\/code> \u662f\u4e0a\u4e00\u9875\u6700\u540e\u4e00\u6761\u6570\u636e\u7684 _id<\/code>\uff0c\u8fd9\u6837\u80fd\u907f\u514d skip()<\/code> \u5bfc\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
        \u65b9\u6cd5<\/th>\u4f5c\u7528<\/th><\/tr><\/thead>
        limit(n)<\/code><\/td>\u9650\u5236\u8fd4\u56de\u6587\u6863\u6570\u91cf<\/td><\/tr>
        skip(n)<\/code><\/td>\u8df3\u8fc7\u524d n<\/code> \u6761\u6570\u636e<\/td><\/tr>
        sort()<\/code><\/td>\u5bf9\u67e5\u8be2\u7ed3\u679c\u6392\u5e8f<\/td><\/tr>
        limit()<\/code> + skip()<\/code><\/td>\u5206\u9875\u67e5\u8be2<\/td><\/tr>
        skip()<\/code> \u5f71\u54cd\u6027\u80fd<\/td>\u5927\u6570\u636e\u5206\u9875\u63a8\u8350\u7528\u8303\u56f4\u67e5\u8be2\u4ee3\u66ff skip()<\/code><\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        MongoDB limit() \u4e0e skip() \u65b9\u6cd5 \u5728 MongoDB \u67e5\u8be2\u4e2d\uff0climit() \u548c ski […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77],"tags":[],"class_list":["post-2451","post","type-post","status-publish","format-standard","hentry","category-mongodb"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2451"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2451\/revisions"}],"predecessor-version":[{"id":2452,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2451\/revisions\/2452"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}