{"id":1088,"date":"2023-03-12T11:23:50","date_gmt":"2023-03-12T03:23:50","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1088"},"modified":"2023-04-29T11:28:38","modified_gmt":"2023-04-29T03:28:38","slug":"mongodb-document-basic-operations","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/12\/mongodb-document-basic-operations\/","title":{"rendered":"MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c"},"content":{"rendered":"

MongoDB\u63d2\u5165\u6587\u6863<\/h2>\n

\u6587\u6863\u7684\u6570\u636e\u7ed3\u6784\u548cJSON\u57fa\u672c\u4e00\u6837\u3002\u6240\u6709\u5b58\u50a8\u5728\u96c6\u5408\u4e2d\u7684\u6570\u636e\u90fd\u662fBSON\u683c\u5f0f\u3002<\/p>\n

BSON\u662f\u4e00\u79cd\u7c7bJSON\u7684\u4e00\u79cd\u4e8c\u8fdb\u5236\u5f62\u5f0f\u7684\u5b58\u50a8\u683c\u5f0f\uff0c\u7b80\u79f0Binary JSON\u3002<\/p>\n

<\/p>\n

\u63d2\u5165\u6587\u6863\u8bed\u6cd5<\/h3>\n

MongoDB \u4f7f\u7528 insert() \u6216 save() \u65b9\u6cd5\u5411\u96c6\u5408\u4e2d\u63d2\u5165\u6587\u6863\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

db.COLLECTION_NAME.insert(document)<\/code><\/pre>\n
\u63d2\u5165\u6587\u6863\u5b9e\u4f8b<\/h3>\n
\u4ee5\u4e0b\u6587\u6863\u53ef\u4ee5\u5b58\u50a8\u5728 MongoDB \u7684 appblog \u6570\u636e\u5e93 \u7684 site \u96c6\u5408\u4e2d\uff1a<\/p>\n
> db.site.insert({title: 'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c', \n    description: 'MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['MongoDB', 'database', 'NoSQL'],\n    likes: 100\n})<\/code><\/pre>\n
\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d site \u662f\u6211\u4eec\u7684\u96c6\u5408\u540d\uff0c\u5982\u679c\u8be5\u96c6\u5408\u4e0d\u5728\u8be5\u6570\u636e\u5e93\u4e2d\uff0cMongoDB \u4f1a\u81ea\u52a8\u521b\u5efa\u8be5\u96c6\u5408\u5e76\u63d2\u5165\u6587\u6863\u3002<\/p>\n
\u67e5\u770b\u5df2\u63d2\u5165\u6587\u6863\uff1a<\/p>\n
> db.site.find()\n{ "_id" : ObjectId("5aebc8fd851561202b93df06"), "title" : "MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c", "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "MongoDB", "database", "NoSQL" ], "likes" : 100 }\n> <\/code><\/pre>\n
\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u6570\u636e\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u53d8\u91cf\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
> document = ({title: 'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c', \n    description: 'MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['MongoDB', 'database', 'NoSQL'],\n    likes: 100\n});<\/code><\/pre>\n
\u6267\u884c\u540e\u663e\u793a\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{\n    "title" : "MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c",\n    "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93",\n    "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2",\n    "url" : "http:\/\/www.appblog.cn",\n    "tags" : [\n        "MongoDB",\n        "database",\n        "NoSQL"\n    ],\n    "likes" : 100\n}<\/code><\/pre>\n
\u6267\u884c\u63d2\u5165\u64cd\u4f5c\uff1a<\/p>\n
> db.site.insert(document)\nWriteResult({ "nInserted" : 1 })<\/code><\/pre>\n
\n
\u63d2\u5165\u6587\u6863\u4e5f\u53ef\u4ee5\u4f7f\u7528 db.col.save(document)<\/code> \u547d\u4ee4\u3002\u5982\u679c\u4e0d\u6307\u5b9a _id \u5b57\u6bb5 save() \u65b9\u6cd5\u7c7b\u4f3c\u4e8e insert() \u65b9\u6cd5\u3002\u5982\u679c\u6307\u5b9a _id \u5b57\u6bb5\uff0c\u5219\u4f1a\u66f4\u65b0\u8be5 _id \u7684\u6570\u636e\u3002<\/p>\n<\/blockquote>\n
MongoDB 3.2 \u7248\u672c\u540e\u63d0\u4f9b\u53ef\u7528\u4e8e\u63d2\u5165\u6587\u6863\u7684\u8bed\u6cd5<\/h3>\n
db.collection.insertOne()<\/code>\uff1a\u5411\u6307\u5b9a\u96c6\u5408\u4e2d\u63d2\u5165\u4e00\u6761\u6587\u6863\u6570\u636e
\ndb.collection.insertMany()<\/code>\uff1a\u5411\u6307\u5b9a\u96c6\u5408\u4e2d\u63d2\u5165\u591a\u6761\u6587\u6863\u6570\u636e<\/p>\n
    \n
  • \u63d2\u5165\u5355\u6761\u6570\u636e<\/li>\n<\/ul>\n
    > var document = db.collection.insertOne({"a": 3})\n> document\n{\n    "acknowledged" : true,\n    "insertedId" : ObjectId("5aebcafb851561202b93df08")\n}<\/code><\/pre>\n
      \n
    • \u63d2\u5165\u591a\u6761\u6570\u636e<\/li>\n<\/ul>\n
      > var res = db.collection.insertMany([{"b": 1}, {'c': 2}])\n> res\n{\n    "acknowledged" : true,\n    "insertedIds" : [\n        ObjectId("5aebcb6c851561202b93df09"),\n        ObjectId("5aebcb6c851561202b93df0a")\n    ]\n}<\/code><\/pre>\n
      MongoDB\u66f4\u65b0\u6587\u6863<\/h2>\n
      MongoDB \u4f7f\u7528 update() \u548c save() \u65b9\u6cd5\u6765\u66f4\u65b0\u96c6\u5408\u4e2d\u7684\u6587\u6863\u3002<\/p>\n
      update() \u65b9\u6cd5<\/h3>\n
      \u8bed\u6cd5<\/h4>\n
      update() \u65b9\u6cd5\u7528\u4e8e\u66f4\u65b0\u5df2\u5b58\u5728\u7684\u6587\u6863\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
      db.collection.update(\n   <query>,\n   <update>,\n   {\n     upsert: <boolean>,\n     multi: <boolean>,\n     writeConcern: <document>\n   }\n)<\/code><\/pre>\n
      \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n
        \n
      • query<\/code>\uff1aupdate\u7684\u67e5\u8be2\u6761\u4ef6\uff0c\u7c7b\u4f3csql update\u67e5\u8be2\u5185where\u540e\u9762\u7684\u3002<\/li>\n
      • update<\/code>\uff1aupdate\u7684\u5bf9\u8c61\u548c\u4e00\u4e9b\u66f4\u65b0\u7684\u64cd\u4f5c\u7b26\uff08\u5982$,$inc…\uff09\u7b49\uff0c\u4e5f\u53ef\u4ee5\u7406\u89e3\u4e3asql update\u67e5\u8be2\u5185set\u540e\u9762\u7684\u3002<\/li>\n
      • upsert<\/code>\uff1a\u53ef\u9009\uff0c\u8fd9\u4e2a\u53c2\u6570\u7684\u610f\u601d\u662f\uff0c\u5982\u679c\u4e0d\u5b58\u5728update\u7684\u8bb0\u5f55\uff0c\u662f\u5426\u63d2\u5165objNew\u3002true\u4e3a\u63d2\u5165\uff0c\u9ed8\u8ba4\u662ffalse\uff0c\u4e0d\u63d2\u5165\u3002<\/li>\n
      • multi<\/code>\uff1a\u53ef\u9009\uff0cMongoDB \u9ed8\u8ba4\u662ffalse\uff0c\u53ea\u66f4\u65b0\u627e\u5230\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\uff0c\u5982\u679c\u8fd9\u4e2a\u53c2\u6570\u4e3atrue\uff0c\u5c31\u628a\u6309\u6761\u4ef6\u67e5\u51fa\u6765\u591a\u6761\u8bb0\u5f55\u5168\u90e8\u66f4\u65b0\u3002<\/li>\n
      • writeConcern<\/code>\uff1a\u53ef\u9009\uff0c\u629b\u51fa\u5f02\u5e38\u7684\u7ea7\u522b\u3002<\/li>\n
      • \n
          \n
        • WriteConcern.NONE\uff1a\u6ca1\u6709\u5f02\u5e38\u629b\u51fa<\/li>\n<\/ul>\n<\/li>\n
        • \n
            \n
          • WriteConcern.NORMAL\uff1a\u4ec5\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\uff0c\u6ca1\u6709\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38<\/li>\n<\/ul>\n<\/li>\n
          • \n
              \n
            • WriteConcern.SAFE\uff1a\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\u3001\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38\uff1b\u5e76\u7b49\u5f85\u670d\u52a1\u5668\u5b8c\u6210\u5199\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n
            • \n
                \n
              • WriteConcern.MAJORITY\uff1a\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\u3001\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38\uff1b\u5e76\u7b49\u5f85\u4e00\u4e2a\u4e3b\u670d\u52a1\u5668\u5b8c\u6210\u5199\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n
              • \n
                  \n
                • WriteConcern.FSYNC_SAFE\uff1a\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\u3001\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38\uff1b\u5199\u64cd\u4f5c\u7b49\u5f85\u670d\u52a1\u5668\u5c06\u6570\u636e\u5237\u65b0\u5230\u78c1\u76d8<\/li>\n<\/ul>\n<\/li>\n
                • \n
                    \n
                  • WriteConcern.JOURNAL_SAFE\uff1a\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\u3001\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38\uff1b\u5199\u64cd\u4f5c\u7b49\u5f85\u670d\u52a1\u5668\u63d0\u4ea4\u5230\u78c1\u76d8\u7684\u65e5\u5fd7\u6587\u4ef6<\/li>\n<\/ul>\n<\/li>\n
                  • \n
                      \n
                    • WriteConcern.REPLICAS_SAFE\uff1a\u629b\u51fa\u7f51\u7edc\u9519\u8bef\u5f02\u5e38\u3001\u670d\u52a1\u5668\u9519\u8bef\u5f02\u5e38\uff1b\u7b49\u5f85\u81f3\u5c112\u53f0\u670d\u52a1\u5668\u5b8c\u6210\u5199\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                      \u5b9e\u4f8b<\/h4>\n
                      \u6211\u4eec\u5728\u96c6\u5408 col \u4e2d\u63d2\u5165\u5982\u4e0b\u6570\u636e\uff1a<\/p>\n
                      > db.col.insert({title: 'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c', \n    description: 'MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['mongodb', 'database', 'NoSQL'],\n    likes: 100\n})<\/code><\/pre>\n
                      \u63a5\u7740\u6211\u4eec\u901a\u8fc7 update() \u65b9\u6cd5\u6765\u66f4\u65b0\u6807\u9898(title)\uff1a<\/p>\n
                      > db.col.update({'title':'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c'}, {$set:{'title':'MongoDB\u6587\u6863\u66f4\u65b0\u64cd\u4f5c'}})\nWriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })\n> db.col.find().pretty()\n{\n    "_id" : ObjectId("5aebcfa8851561202b93df0c"),\n    "title" : "MongoDB\u6587\u6863\u66f4\u65b0\u64cd\u4f5c",\n    "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93",\n    "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2",\n    "url" : "http:\/\/www.appblog.cn",\n    "tags" : [\n        "mongodb",\n        "database",\n        "NoSQL"\n    ],\n    "likes" : 100\n}\n> <\/code><\/pre>\n
                      \u53ef\u4ee5\u770b\u5230\u6807\u9898(title)\u7531\u539f\u6765\u7684 "MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c" \u66f4\u65b0\u4e3a "MongoDB\u6587\u6863\u66f4\u65b0\u64cd\u4f5c"\u3002<\/p>\n
                      \u4ee5\u4e0a\u8bed\u53e5\u53ea\u4f1a\u4fee\u6539\u7b2c\u4e00\u6761\u53d1\u73b0\u7684\u6587\u6863\uff0c\u5982\u679c\u9700\u8981\u4fee\u6539\u591a\u6761\u76f8\u540c\u7684\u6587\u6863\uff0c\u5219\u9700\u8981\u8bbe\u7f6e multi \u53c2\u6570\u4e3a true\u3002<\/p>\n
                      > db.col.update({'title':'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c'}, {$set:{'title':'MongoDB\u6587\u6863\u66f4\u65b0\u64cd\u4f5c'}}, {multi:true})<\/code><\/pre>\n
                      save() \u65b9\u6cd5<\/h3>\n
                      \u8bed\u6cd5<\/h4>\n
                      save() \u65b9\u6cd5\u901a\u8fc7\u4f20\u5165\u7684\u6587\u6863\u6765\u66ff\u6362\u5df2\u6709\u6587\u6863\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
                      db.collection.save(\n   <document>,\n   {\n     writeConcern: <document>\n   }\n)<\/code><\/pre>\n
                      \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n
                        \n
                      • document\uff1a\u6587\u6863\u6570\u636e\u3002<\/li>\n
                      • writeConcern\uff1a\u53ef\u9009\uff0c\u629b\u51fa\u5f02\u5e38\u7684\u7ea7\u522b\u3002<\/li>\n<\/ul>\n
                        \u5b9e\u4f8b<\/h4>\n
                        \u4ee5\u4e0b\u5b9e\u4f8b\u4e2d\u6211\u4eec\u66ff\u6362\u4e86 _id \u4e3a 5aebcfa8851561202b93df0c \u7684\u6587\u6863\u6570\u636e\uff1a<\/p>\n
                        > db.col.save({\n    "_id" : ObjectId("5aebcfa8851561202b93df0c"),\n    "title" : "MongoDB",\n    "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93",\n    "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2",\n    "url" : "http:\/\/www.appblog.cn",\n    "tags" : [\n        "MongoDB",\n        "NoSQL"\n    ],\n    "likes" : 110\n})<\/code><\/pre>\n
                        \u66ff\u6362\u6210\u529f\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 find() \u547d\u4ee4\u6765\u67e5\u770b\u66ff\u6362\u540e\u7684\u6570\u636e<\/p>\n
                        > db.col.find().pretty()\n{\n        "_id" : ObjectId("56064f89ade2f21f36b03136"),\n        "title" : "MongoDB",\n        "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93",\n        "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2",\n        "url" : "http:\/\/www.appblog.cn",\n        "tags" : [\n            "MongoDB",\n            "NoSQL"\n        ],\n        "likes" : 110\n}<\/code><\/pre>\n
                        \u66f4\u591a\u5b9e\u4f8b<\/h4>\n
                        \u53ea\u66f4\u65b0\u7b2c\u4e00\u6761\u8bb0\u5f55\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $set : { "test" : "OK"} } );<\/code><\/pre>\n
                        \u5168\u90e8\u66f4\u65b0\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $set : { "test" : "OK"} }, false, true );<\/code><\/pre>\n
                        \u53ea\u6dfb\u52a0\u7b2c\u4e00\u6761\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $set : { "test" : "OK"} }, true, false );<\/code><\/pre>\n
                        \u5168\u90e8\u6dfb\u52a0\u8fdb\u53bb\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $set : { "test" : "OK"} }, true, true );<\/code><\/pre>\n
                        \u5168\u90e8\u66f4\u65b0\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $inc : { "count" : 1} }, false, true );<\/code><\/pre>\n
                        \u53ea\u66f4\u65b0\u7b2c\u4e00\u6761\u8bb0\u5f55\uff1a<\/p>\n
                        db.col.update( { "count" : { $gt : 8 } } , { $inc : { "count" : 1} }, false, false );<\/code><\/pre>\n
                        MongoDB 3.2\u7248\u672c\u5f00\u59cb\uff0cMongoDB\u63d0\u4f9b\u66f4\u65b0\u96c6\u5408\u6587\u6863\u7684\u65b9\u6cd5<\/h3>\n
                          \n
                        • db.collection.updateOne()<\/code>\uff1a\u5411\u6307\u5b9a\u96c6\u5408\u66f4\u65b0\u5355\u4e2a\u6587\u6863<\/li>\n
                        • db.collection.updateMany()<\/code>\uff1a\u5411\u6307\u5b9a\u96c6\u5408\u66f4\u65b0\u591a\u4e2a\u6587\u6863<\/li>\n<\/ul>\n
                          \u9996\u5148\u6211\u4eec\u5728test\u96c6\u5408\u91cc\u63d2\u5165\u6d4b\u8bd5\u6570\u636e<\/p>\n
                          use test\ndb.test_collection.insert([\n  {"name":"china","age":"20","status":"a"},\n  {"name":"america","age":"19","status":"b"},\n  {"name":"russia","age":"18","status":"c"},\n])<\/code><\/pre>\n
                          \u66f4\u65b0\u5355\u4e2a\u6587\u6863<\/p>\n
                          > db.test_collection.updateOne({"name":"china"},{$set:{"age":"28"}})\n{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }\n> db.test_collection.find()\n{ "_id" : ObjectId("59c8ba673b92ae498a5716af"), "name" : "china", "age" : "28", "status" : "a" }\n{ "_id" : ObjectId("59c8ba673b92ae498a5716b0"), "name" : "america", "age" : "19", "status" : "b" }\n{ "_id" : ObjectId("59c8ba673b92ae498a5716b1"), "name" : "russia", "age" : "18", "status" : "c" }\n><\/code><\/pre>\n
                          \u66f4\u65b0\u591a\u4e2a\u6587\u6863<\/p>\n
                          > db.test_collection.updateMany({"age":{$gt:"10"}},{$set:{"status":"xyz"}})\n{ "acknowledged" : true, "matchedCount" : 3, "modifiedCount" : 3 }\n> db.test_collection.find()\n{ "_id" : ObjectId("59c8ba673b92ae498a5716af"), "name" : "china", "age" : "28", "status" : "xyz" }\n{ "_id" : ObjectId("59c8ba673b92ae498a5716b0"), "name" : "america", "age" : "19", "status" : "xyz" }\n{ "_id" : ObjectId("59c8ba673b92ae498a5716b1"), "name" : "russia", "age" : "18", "status" : "xyz" }\n><\/code><\/pre>\n
                          MongoDB\u5220\u9664\u6587\u6863<\/h2>\n
                          remove() \u65b9\u6cd5<\/h3>\n
                          MongoDB remove()\u51fd\u6570\u662f\u7528\u6765\u79fb\u9664\u96c6\u5408\u4e2d\u7684\u6570\u636e\u3002<\/p>\n
                          MongoDB\u6570\u636e\u66f4\u65b0\u53ef\u4ee5\u4f7f\u7528update()\u51fd\u6570\u3002\u5728\u6267\u884cremove()\u51fd\u6570\u524d\u5148\u6267\u884cfind()\u547d\u4ee4\u6765\u5224\u65ad\u6267\u884c\u7684\u6761\u4ef6\u662f\u5426\u6b63\u786e\uff0c\u8fd9\u662f\u4e00\u4e2a\u6bd4\u8f83\u597d\u7684\u4e60\u60ef\u3002<\/p>\n
                          \u8bed\u6cd5<\/h4>\n
                          remove() \u65b9\u6cd5\u7684\u57fa\u672c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
                          db.collection.remove(\n   <query>,\n   <justOne>\n)<\/code><\/pre>\n
                          \u5982\u679c MongoDB \u662f 2.6 \u7248\u672c\u4ee5\u540e\u7684\uff0c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
                          db.collection.remove(\n   <query>,\n   {\n     justOne: <boolean>,\n     writeConcern: <document>\n   }\n)<\/code><\/pre>\n
                          \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n
                            \n
                          • query\uff1a\uff08\u53ef\u9009\uff09\u5220\u9664\u7684\u6587\u6863\u7684\u6761\u4ef6\u3002<\/li>\n
                          • justOne\uff1a\uff08\u53ef\u9009\uff09\u5982\u679c\u8bbe\u4e3a true \u6216 1\uff0c\u5219\u53ea\u5220\u9664\u4e00\u4e2a\u6587\u6863\u3002<\/li>\n
                          • writeConcern\uff1a\uff08\u53ef\u9009\uff09\u629b\u51fa\u5f02\u5e38\u7684\u7ea7\u522b\u3002<\/li>\n<\/ul>\n
                            \u5b9e\u4f8b<\/h4>\n
                            \u4ee5\u4e0b\u6587\u6863\u6211\u4eec\u6267\u884c\u4e24\u6b21\u63d2\u5165\u64cd\u4f5c\uff1a<\/p>\n
                            > db.col.insert({title: 'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c', \n    description: 'MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['mongodb', 'database', 'NoSQL'],\n    likes: 100\n})<\/code><\/pre>\n
                            \u4f7f\u7528 find() \u51fd\u6570\u67e5\u8be2\u6570\u636e\uff1a<\/p>\n
                            > db.col.find()\n{ "_id" : ObjectId("5aebc8fd851561202b93df06"), "title" : "MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c", "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }\n{ "_id" : ObjectId("5aebca2c851561202b93df07"), "title" : "MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c", "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }\n> <\/code><\/pre>\n
                            \u63a5\u4e0b\u6765\u6211\u4eec\u79fb\u9664 title \u4e3a ‘MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c’ \u7684\u6587\u6863\uff1a<\/p>\n
                            > db.col.remove({'title':'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c'})\nWriteResult({ "nRemoved" : 2 })           # \u5220\u9664\u4e86\u4e24\u6761\u6570\u636e\n> db.col.find()\n\u2026\u2026                                        # \u6ca1\u6709\u6570\u636e<\/code><\/pre>\n
                            \u5982\u679c\u53ea\u60f3\u5220\u9664\u7b2c\u4e00\u6761\u627e\u5230\u7684\u8bb0\u5f55\u53ef\u4ee5\u8bbe\u7f6e justOne \u4e3a 1\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
                            > db.col.remove({'title':'MongoDB\u6587\u6863\u57fa\u672c\u64cd\u4f5c'}, {justOne:1})<\/code><\/pre>\n
                            \u5982\u679c\u60f3\u5220\u9664\u6240\u6709\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\uff08\u7c7b\u4f3c\u5e38\u89c4 SQL \u7684 truncate \u547d\u4ee4\uff09\uff1a<\/p>\n
                            > db.col.remove({})<\/code><\/pre>\n
                            deleteOne() \u548c deleteMany() \u65b9\u6cd5<\/h3>\n
                            remove() \u65b9\u6cd5\u5df2\u7ecf\u8fc7\u65f6\uff0c\u73b0\u5728\u5b98\u65b9\u63a8\u8350\u4f7f\u7528 deleteOne() \u548c deleteMany() \u65b9\u6cd5\u3002<\/p>\n
                            \u5982\u5220\u9664\u96c6\u5408\u4e0b\u5168\u90e8\u6587\u6863\uff1a<\/p>\n
                            db.inventory.deleteMany({})\n\n\u5220\u9664 status \u7b49\u4e8e A \u7684\u5168\u90e8\u6587\u6863\uff1a\n\n```javascript\ndb.inventory.deleteMany({ status : \"A\" })<\/code><\/pre>\n
                            \u5220\u9664 status \u7b49\u4e8e D \u7684\u4e00\u4e2a\u6587\u6863\uff1a<\/p>\n
                            db.inventory.deleteOne( { status: \"D\" } )<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                            MongoDB\u63d2\u5165\u6587\u6863 \u6587\u6863\u7684\u6570\u636e\u7ed3\u6784\u548cJSON\u57fa\u672c\u4e00\u6837\u3002\u6240\u6709\u5b58\u50a8\u5728\u96c6\u5408\u4e2d\u7684\u6570\u636e\u90fd\u662fBSON\u683c\u5f0f\u3002 BSON\u662f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[300],"tags":[],"class_list":["post-1088","post","type-post","status-publish","format-standard","hentry","category-mongodb"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1088"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1088\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}