{"id":29646,"date":"2023-01-11T17:03:59","date_gmt":"2023-06-03T12:43:49","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cmongodb%ef%bd%9e%e8%81%9a%e5%90%88%e6%93%8d%e4%bd%9c%e7%af%87%ef%bd%9e\/"},"modified":"2025-08-12T15:10:00","modified_gmt":"2025-08-12T07:10:00","slug":"%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cmongodb%ef%bd%9e%e8%81%9a%e5%90%88%e6%93%8d%e4%bd%9c%e7%af%87%ef%bd%9e","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cmongodb%ef%bd%9e%e8%81%9a%e5%90%88%e6%93%8d%e4%bd%9c%e7%af%87%ef%bd%9e\/","title":{"rendered":"\u4f7f\u7528Python\u64cd\u4f5cMongoDB\uff5e\u805a\u5408\u64cd\u4f5c\u7bc7\uff5e"},"content":{"rendered":"

\u53ea\u9700\u8981\u4e00\u79cd\u9009\u62e9\u5373\u53ef:\u6587\u7ae0\u7684\u8303\u56f4<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306fPython\u3067mongodb\u306b\u63a5\u7d9a\u3057\u3066\u304b\u3089\u3001aggregate\uff08SQL\u3067\u8a00\u3046\u3068\u3053\u308d\u306e\u96c6\u8a08\u95a2\u6570\uff09\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8a18\u8f09\u3057\u307e\u3059\u3002
\nmongodb\u306e\u8d77\u52d5\u3084pymongo\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u3054\u89a7\u3044\u305f\u3060\u3051\u308c\u3070\u5e78\u3044\u3067\u3059\u3002
\nhttps:\/\/qiita.com\/bc_yuuuuuki\/items\/2b92598434f6cc320112<\/p>\n

\u51c6\u5907\u6570\u636e\u6e96\u5099\u8cc7\u6599\u5c07\u4f7f\u7528\u4ee5\u4e0b\u6587\u7ae0\uff1a[Python] Qiita\u6587\u7ae0\u8cc7\u8a0a\u5b58\u5165mongoDB\u7684Qiita\u6587\u7ae0\u8cc7\u8a0a\u3002<\/p>\n

\u6c47\u603b\u7684\u7528\u6cd5 de\u5bf9\u4e8e\u719f\u6089SQL\u7684\u4eba\u6765\u8bf4\uff0c\u4f7f\u7528MongoDB\u7684\u805a\u5408\uff08aggregate\uff09\u529f\u80fd\u53ef\u80fd\u4e0d\u592a\u5bb9\u6613\u7406\u89e3\u3002\u4e0b\u8868\u5c55\u793a\u4e86SQL\u548cMongoDB\u805a\u5408\u7684\u5bf9\u6bd4\u3002<\/p>\n
\n
SQLaggregateWHERE$matchGROUP BY$groupHAVING$matchSELECT$projectORDER BY$sortLIMIT$limitSUM()$sumCOUNT()$sum<\/p>\n

MongoDB\u64cd\u4f5c\u7c7b\u6211\u6b63\u5728\u4f7f\u7528pymongo\u521b\u5efa\u4e00\u4e2a\u4f7f\u7528\u5404\u79cdmongoDB\u64cd\u4f5c\u7684\u7c7b\u3002<\/p>\n
from<\/span> pymongo<\/span> import<\/span> MongoClient<\/span>\r\n\r\nclass<\/span> MongoSample<\/span>(<\/span>object<\/span>):<\/span>\r\n\r\n    def<\/span> __init__<\/span>(<\/span>self<\/span>,<\/span> dbName<\/span>,<\/span> collectionName<\/span>):<\/span>\r\n        self<\/span>.<\/span>client<\/span> =<\/span> MongoClient<\/span>()<\/span>\r\n        self<\/span>.<\/span>db<\/span> =<\/span> self<\/span>.<\/span>client<\/span>[<\/span>dbName<\/span>]<\/span> #DB\u540d\u3092\u8a2d\u5b9a\r\n<\/span>        self<\/span>.<\/span>collection<\/span> =<\/span> self<\/span>.<\/span>db<\/span>.<\/span>get_collection<\/span>(<\/span>collectionName<\/span>)<\/span>\r\n\r\n    def<\/span> aggregate<\/span>(<\/span>self<\/span>,<\/span> filter<\/span>,<\/span> **<\/span>keyword<\/span>):<\/span>\r\n        return<\/span> self<\/span>.<\/span>collection<\/span>.<\/span>aggregate<\/span>(<\/span>filter<\/span>,<\/span> keyword<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u6211\u53ea\u662f\u5728\u4e3a\u8c03\u7528aggregate\u7684\u51fd\u6570\u505a\u51c6\u5907\u3002<\/p>\n
\u901a\u8fc7MongoDB\u83b7\u53d6\u6570\u636e
\n\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u4ee3\u7801\u3002<\/p>\n
from<\/span> mongo_sample<\/span> import<\/span> MongoSample<\/span>\r\nimport<\/span> pprint<\/span>\r\n# arg1:DB Name\r\n# arg2:Collection Name\r\n<\/span>mongo<\/span> =<\/span> MongoSample<\/span>(<\/span>\"db\"<\/span>,<\/span> \"qiita\"<\/span>)<\/span>\r\n\r\n# \u6700\u5927\u5024\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span> \"_id\"<\/span>:<\/span>\"title\"<\/span>,<\/span>\"page_max_view\"<\/span>:{<\/span>\"$max\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\nresults<\/span> =<\/span> mongo<\/span>.<\/span>aggregate<\/span>(<\/span>pipeline<\/span>)<\/span>\r\nprint<\/span>(<\/span>\"------------------------\u6700\u5927\u5024-----------------------------\"<\/span>)<\/span>\r\npprint<\/span>.<\/span>pprint<\/span>(<\/span>list<\/span>(<\/span>results<\/span>))<\/span>\r\n\r\n# \u6700\u5c0f\u5024\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span> \"_id\"<\/span>:<\/span>\"title\"<\/span>,<\/span>\"page_min_view\"<\/span>:{<\/span>\"$min\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\nresults<\/span> =<\/span> mongo<\/span>.<\/span>aggregate<\/span>(<\/span>pipeline<\/span>)<\/span>\r\nprint<\/span>(<\/span>\"------------------------\u6700\u5c0f\u5024-----------------------------\"<\/span>)<\/span>\r\npprint<\/span>.<\/span>pprint<\/span>(<\/span>list<\/span>(<\/span>results<\/span>))<\/span>\r\n\r\n# \u5e73\u5747\u5024\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span> \"_id\"<\/span>:<\/span>\"average\"<\/span>,<\/span>\"page_average_view\"<\/span>:{<\/span>\"$avg\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\n\r\n# \u5408\u8a08\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span>\"_id\"<\/span>:<\/span>\"page_total_count\"<\/span>,<\/span>\"total\"<\/span>:{<\/span>\"$sum\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\nresults<\/span> =<\/span> mongo<\/span>.<\/span>aggregate<\/span>(<\/span>pipeline<\/span>)<\/span>\r\nprint<\/span>(<\/span>\"------------------------\u5e73\u5747\u5024-----------------------------\"<\/span>)<\/span>\r\npprint<\/span>.<\/span>pprint<\/span>(<\/span>list<\/span>(<\/span>results<\/span>))<\/span>\r\n\r\n# tag\u6bce\u306e\u51fa\u73fe\u56de\u6570\u30ab\u30a6\u30f3\u30c8\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span> \"$unwind\"<\/span>:<\/span> \"$tag_list\"<\/span>},<\/span> \r\n    {<\/span> \"$group\"<\/span>:<\/span> {<\/span> \"_id\"<\/span>:<\/span> \"$tag_list\"<\/span>,<\/span> \"count\"<\/span>:<\/span> {<\/span> \"$sum\"<\/span>:<\/span>1<\/span>}}},<\/span>\r\n    {<\/span> \"$sort\"<\/span>:<\/span> {<\/span>\"count\"<\/span>:<\/span> -<\/span>1<\/span>,<\/span> \"_id\"<\/span>:<\/span>1<\/span>}}<\/span>\r\n]<\/span>\r\n\r\nresults<\/span> =<\/span> mongo<\/span>.<\/span>aggregate<\/span>(<\/span>pipeline<\/span>)<\/span>\r\nprint<\/span>(<\/span>\"------------------------\u96c6\u8a08\u5024-----------------------------\"<\/span>)<\/span>\r\npprint<\/span>.<\/span>pprint<\/span>(<\/span>list<\/span>(<\/span>results<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u6211\u6240\u505a\u7684\u6ca1\u6709\u4ec0\u4e48\u4e86\u4e0d\u8d77\u7684\u4e8b\u60c5\u3002\u6b63\u5728\u83b7\u53d6\u6700\u5927\u503c\u3001\u6700\u5c0f\u503c\u3001\u5e73\u5747\u503c\uff0c\u4ee5\u53ca\u6309\u6807\u7b7e\u8ba1\u6570\u7684\u6570\u636e\u3002<\/p>\n
\u9700\u8981\u5b89\u88c5pprint\u3002<\/p>\n
pip install pprint\r\n<\/code><\/pre>\n
\u305d\u308c\u305e\u308c\u3001mongoDB\u306e\u64cd\u4f5c\u65b9\u6cd5\u3068\u898b\u6bd4\u3079\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u6700\u5927\u503c\/\u6700\u5c0f\u503c\/\u5e73\u5747\u503c\/\u603b\u548c
\n\u9996\u5148\uff0c\u9700\u8981\u4e86\u89e3MongoDB\u7684\u547d\u4ee4\u3002
\n\u4ee5\u6700\u5927\u503c\u4e3a\u4f8b\u3002\u5982\u679c\u5c06max\u6539\u4e3amin\u3001avg\u6216sum\uff0c\u5219\u53ef\u4ee5\u5f97\u5230\u6700\u5c0f\u503c\/\u5e73\u5747\u503c\/\u6700\u5927\u503c\u3002<\/p>\n
db.qiita.aggregate([{$group:{_id:\"page_max_views\",total:{$max:\"$page_views_count\"}}}])\r\n<\/code><\/pre>\n
pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span> \"_id\"<\/span>:<\/span>\"title\"<\/span>,<\/span>\"page_max_view\"<\/span>:{<\/span>\"$max\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u7ed3\u679c<\/p>\n
[{'_id': 'title', 'page_max_view': 2461}]\r\n<\/code><\/pre>\n
\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u5c06”_id”\u56fa\u5b9a\u4e3a”title”\uff0c\u7136\u540e\u83b7\u53d6\u6240\u6709\u8bb0\u5f55\u4e2d\u7684\u6700\u5927\u503c\u3002<\/p>\n
\u4f46\u662f\uff0c\u6211\u60f3\u77e5\u9053\u54ea\u7bc7\u6587\u7ae0\u88ab\u9605\u8bfb\u5f97\u6700\u591a\uff0c\u6240\u4ee5\u5e0c\u671b\u663e\u793a\u6587\u7ae0\u7684\u6807\u9898\u3002<\/p>\n
MongoDB\u547d\u4ee4<\/p>\n
> db.qiita.aggregate([{$project:{title:1,page_views_count:1}},{$group:{_id:\"$title\", total:{$max:\"$page_views_count\"}}},{$sort:{total:-1}}])\r\n{ \"_id\" : \"Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff12\uff1afind\u7de8\uff5e\", \"total\" : 2461 }\r\n{ \"_id\" : \"Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff13\uff1aupdate\u7de8\uff5e\", \"total\" : 1137 }\r\n{ \"_id\" : \"Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff14\uff1ainsert\u7de8\uff5e\", \"total\" : 1102 }\r\n{ \"_id\" : \"pymongo\u3092\u4f7f\u3063\u305f\u69d8\u3005\u306a\u691c\u7d22\u6761\u4ef6\uff08AND\uff0fOR\uff0f\u90e8\u5206\u4e00\u81f4\uff0f\u7bc4\u56f2\u691c\u7d22\uff09\", \"total\" : 1019 }\r\n\uff08\u7565\uff09\r\n<\/code><\/pre>\n
\u4f7f\u7528\u8fd9\u4e2a\u547d\u4ee4\uff0c\u60a8\u53ef\u4ee5\u67e5\u770b\u6587\u7ae0\u7684\u6807\u9898\u548c\u9875\u9762\u6d4f\u89c8\u6b21\u6570\u3002
\n\u6beb\u65e0\u7591\u95ee\uff0c\u7531\u4e8e\u6309\u6587\u7ae0\u540d\u79f0\u5206\u7ec4\uff0c\u6240\u4ee5\u8fd9\u79cd\u7edf\u8ba1\u6ca1\u6709\u592a\u591a\u610f\u4e49\u3002
\n\u5982\u679c\u4e0d\u9700\u8981\u8fdb\u884c\u5206\u7ec4\uff0c\u6700\u597d\u7684\u65b9\u6cd5\u662f\u5728find\u4e2d\u8fdb\u884c\u6392\u5e8f\u5e76\u8bbe\u7f6e\u9650\u5236\u3002<\/p>\n
\u8ba9\u6211\u4eec\u83b7\u53d6\u6bcf\u4e2a\u6807\u7b7e\u7684\u6700\u5927\u503c\u3002<\/p>\n
> db.qiita.aggregate([{$group:{_id:\"$tag1\", total:{$max:\"$page_views_count\"}}},{$sort:{total:-1}}])\r\n{ \"_id\" : \"Python\", \"total\" : 2461 }\r\n{ \"_id\" : \"Vagrant\", \"total\" : 946 }\r\n{ \"_id\" : \"Java\", \"total\" : 617 }\r\n{ \"_id\" : \"Hyperledger\", \"total\" : 598 }\r\n{ \"_id\" : \"solidity\", \"total\" : 363 }\r\n{ \"_id\" : \"Ethereum\", \"total\" : 347 }\r\n{ \"_id\" : \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"total\" : 232 }\r\n{ \"_id\" : \"Blockchain\", \"total\" : 201 }\r\n{ \"_id\" : \"coverage\", \"total\" : 199 }\r\n<\/code><\/pre>\n
\u597d\u7684\u3002\u53d6\u5f97\u5f97\u8fd8\u4e0d\u9519\u3002<\/p>\n
\u6682\u4e14\uff0c\u6211\u8bd5\u7740\u6539\u53d8\u4e00\u4e0bPython\u7684\u4ee3\u7801\u3002<\/p>\n
# \u6700\u5927\u5024\r\n<\/span>pipeline<\/span> =<\/span> [<\/span>\r\n    {<\/span>\"$group\"<\/span>:{<\/span> \"_id\"<\/span>:<\/span>\"$tag1\"<\/span>,<\/span>\"page_max_view\"<\/span>:{<\/span>\"$max\"<\/span>:<\/span>\"$page_views_count\"<\/span>}}}<\/span>\r\n]<\/span>\r\nresults<\/span> =<\/span> mongo<\/span>.<\/span>aggregate<\/span>(<\/span>pipeline<\/span>)<\/span>\r\nprint<\/span>(<\/span>\"------------------------\u6700\u5927\u5024-----------------------------\"<\/span>)<\/span>\r\npprint<\/span>.<\/span>pprint<\/span>(<\/span>list<\/span>(<\/span>results<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u6839\u636e\u6807\u7b7e\u8fdb\u884c\u7edf\u8ba1\u3002
\n\u6211\u60f3\u5bf9\u6bcf\u4e2a\u6807\u7b7e\u5199\u4e86\u591a\u5c11\u7bc7\u6587\u7ae0\u8fdb\u884c\u7edf\u8ba1\u3002
\n\u7edf\u8ba1\u5c06\u4f7f\u7528\u6807\u7b7e\u5217\u8868\u4f5c\u4e3a\u9879\u76ee\uff0c\u5728\u8fd9\u4e2a\u6570\u636e\u4e2d\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
> db.qiita.find({},{_id:0,tag_list:1})\r\n{ \"tag_list\" : [ \"Python\", \"MongoDB\", \"Python3\", \"pymongo\" ] }\r\n{ \"tag_list\" : [ \"Python\", \"Python3\" ] }\r\n{ \"tag_list\" : [ \"Python\", \"Python3\", \"Blockchain\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"Blockchain\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"Blockchain\", \"Ethereum\", \"Hyperledger\", \"Hyperledger-sawtooth\" ] }\r\n{ \"tag_list\" : [ \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger\", \"Hyperledger-sawtooth\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"Hyperledger\", \"Hyperledger-Iroha\" ] }\r\n{ \"tag_list\" : [ \"Hyperledger\", \"Hyperledger-Iroha\", \"Hyperledger-burrow\", \"Hyperledger-sawtooth\", \"Hyperledger-besu\" ] }\r\n{ \"tag_list\" : [ \"Vagrant\", \"VirtualBox\", \"Hyper-V\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"solidity\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"solidity\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Java\", \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"web3j\" ] }\r\n{ \"tag_list\" : [ \"Ethereum\", \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\" ] }\r\n<\/code><\/pre>\n
\u5728SQL\u4e2d\u5bf9\u4ee5\u8fd9\u79cd\u683c\u5f0f\u5b58\u50a8\u7684\u6570\u636e\u8fdb\u884c\u805a\u5408\u786e\u5b9e\u76f8\u5f53\u9ebb\u70e6\u5427\u3002\u3002<\/p>\n
\u901a\u8fc7\u4f7f\u7528 MongoDB \u4e2d\u7684 unwind \u529f\u80fd\uff0c\u53ef\u4ee5\u5c06\u5217\u8868\u5f62\u5f0f\u7684\u6570\u636e\u62c6\u5206\u5e76\u8fdb\u884c\u805a\u5408\u3002<\/p>\n
> db.qiita.aggregate( { $project:{tag_list:1}}, { $unwind: \"$tag_list\"}, { $group: { _id: \"$tag_list\", count: { $sum:1}}},{ $sort: {\"count\": -1, \"_id\":1}} )\r\n{ \"_id\" : \"\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\", \"count\" : 16 }\r\n{ \"_id\" : \"Ethereum\", \"count\" : 11 }\r\n{ \"_id\" : \"Java\", \"count\" : 10 }\r\n{ \"_id\" : \"Python\", \"count\" : 9 }\r\n{ \"_id\" : \"Python3\", \"count\" : 9 }\r\n{ \"_id\" : \"Hyperledger\", \"count\" : 7 }\r\n{ \"_id\" : \"Hyperledger-Iroha\", \"count\" : 7 }\r\n{ \"_id\" : \"MongoDB\", \"count\" : 7 }\r\n{ \"_id\" : \"web3j\", \"count\" : 7 }\r\n{ \"_id\" : \"solidity\", \"count\" : 4 }\r\n{ \"_id\" : \"Blockchain\", \"count\" : 3 }\r\n{ \"_id\" : \"Hyperledger-sawtooth\", \"count\" : 3 }\r\n{ \"_id\" : \"Hyper-V\", \"count\" : 1 }\r\n{ \"_id\" : \"Hyperledger-besu\", \"count\" : 1 }\r\n{ \"_id\" : \"Hyperledger-burrow\", \"count\" : 1 }\r\n{ \"_id\" : \"Vagrant\", \"count\" : 1 }\r\n{ \"_id\" : \"VirtualBox\", \"count\" : 1 }\r\n{ \"_id\" : \"coverage\", \"count\" : 1 }\r\n{ \"_id\" : \"pymongo\", \"count\" : 1 }\r\n{ \"_id\" : \"truffle\", \"count\" : 1 }\r\n<\/code><\/pre>\n
\u8fd9\u4e2aPython\u4ee3\u7801\u6ca1\u6709\u52a0\u5165”{ “$project”: {“tag_list”: 1}}”\u3002
\n\u65e0\u8bba\u6709\u6ca1\u6709\u8fd9\u4e2a\u4ee3\u7801\uff0c\u7ed3\u679c\u90fd\u6ca1\u6709\u6539\u53d8\u3002
\n\u5bf9\u4e8e\u8fd9\u4e2aproject\u7684\u4f7f\u7528\u65b9\u6cd5\u6211\u4e0d\u592a\u6e05\u695a\u3002<\/p>\n
\u5370\u8c61\u719f\u6089SQL\u540e\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u4e00\u4e9b\u96be\u4ee5\u7406\u89e3\u7684\u90e8\u5206\uff0c\u4f46\u901a\u8fc7\u4f7f\u7528unwind\u7b49\u529f\u80fd\u53ef\u4ee5\u5b9e\u73b0\u7075\u6d3b\u7684\u805a\u5408\u67e5\u8be2\u3002<\/p>\n
\u76f8\u5173\u6587\u7ae0<\/p>\n
    \n
  • \n
      Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff11\uff5e<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff12\uff1afind\u7de8\uff5e<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff13\uff1aupdate\u7de8\uff5e<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \n
              • \n
                  Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff14\uff1ainsert\u7de8\uff5e<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    \n
                  • \n
                      Python\u3067mongodb\u3092\u64cd\u4f5c\u3059\u308b\uff5e\u305d\u306e\uff15\uff1adelete\u7de8\uff5e<\/ul>\n<\/li>\n<\/ul>\n
                       <\/p>\n
                        pymongo\u3092\u4f7f\u3063\u305f\u69d8\u3005\u306a\u691c\u7d22\u6761\u4ef6\uff08AND\uff0fOR\uff0f\u90e8\u5206\u4e00\u81f4\uff0f\u7bc4\u56f2\u691c\u7d22\uff09<\/ul>\n","protected":false},"excerpt":{"rendered":"
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