MongoDB查询-使用组和项目以及匹配和限制展开 [英] MongoDB query - Unwind with group and project and match and limit

查看：122
本文介绍了MongoDB查询-使用组和项目以及匹配和限制展开的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我具有以下数据类型:

    {
        "_id" : "HCCIDM1234567A",
        "RecordT" : "THISAPTC",
        "history" : [ 
    {
        "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
        "APTCChange" : 1200,"PremChange" : 1300,"MbrRespChg" : 100,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
        "APTCChange" : 16,"PremChange" : 0,"MbrRespChg" : -200,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
        "APTCChange" : -16,"PremChange" : 0,
        "MbrRespChg" : -224,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : 15,
        "MbrRespChg" : -224,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : -15,
        "MbrRespChg" : -70,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
        "APTCChange" : -10,"PremChange" : -15,
        "MbrRespChg" : -77, "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : 1,
        "MbrRespChg" : 77,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
        "PremChange" : 0,"APTCChange" : 16,
        "MbrRespChg" : -200,"NPN" : "U65"
    }
]
},
{
"_id" : "HCCIDM1234567B",
"RecordT" : "THISAPTC",
"history" : [ 
    {
        "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
        "APTCChange" : 1200,
        "PremChange" : 1300,
        "MbrRespChg" : 100,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
        "APTCChange" : 16,
        "PremChange" : 0,
        "MbrRespChg" : -200,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
        "APTCChange" : -16,
        "PremChange" : 0,
        "MbrRespChg" : -224,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : 15,
        "MbrRespChg" : -224,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : -15,
        "MbrRespChg" : -70,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
        "APTCChange" : -10,
        "PremChange" : -15,
        "MbrRespChg" : -77,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : 1,
        "MbrRespChg" : 77,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
        "PremChange" : 0,
        "APTCChange" : 16,
        "MbrRespChg" : -200,
        "NPN" : "U65"
    }
]
}, 
{
    "_id" : "HCCIDM1234567C",
    "RecordT" : "THISAPTC",
    "history" : [ 
        {
            "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
            "APTCChange" : 1200,
            "PremChange" : 1300,
            "MbrRespChg" : 100,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
            "APTCChange" : 16,
            "PremChange" : 0,
            "MbrRespChg" : -200,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
            "APTCChange" : -16,
            "PremChange" : 0,
            "MbrRespChg" : -224,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : 15,
            "MbrRespChg" : -224,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : -15,
            "MbrRespChg" : -70,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
            "APTCChange" : -10,
            "PremChange" : -15,
            "MbrRespChg" : -77,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : 1,
            "MbrRespChg" : 77,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
            "PremChange" : 0,
            "APTCChange" : 16,
            "MbrRespChg" : -200,
            "NPN" : "U65"
        }
    ]
}

需要满足以下条件:

  1. startDate $ gte ISODate('2018-01-15T11:13:14.000Z')& endDate $ lte ISODate('2018-02-12T11:13:14.000Z')

  2. 需要根据以下类别对它们进行分组

    PremChange> 10-条记录将在一组中有限制
    APTCChange> 10-条记录将限制在一组中 MbrRespChg> 10-条记录将限制在一组中

预期结果:

    {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-14T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
      "APTCChange" : 1200,
      "PremChange" : 1300,
      "MbrRespChg" : 100,
      "NPN" : "U65"
     }
     -------- 
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-15T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
      "APTCChange" : 16,
      "PremChange" : 0,
      "MbrRespChg" : -200,
       "NPN" : "U65"
     }
     ---------
     {
       id: PremChange,
      "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-16T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 15,
      "MbrRespChg" : -224,
      "NPN" : "U65"
     } 
    -----
   {
       id: MbrRespChg,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-18T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 1,
      "MbrRespChg" : 77,
      "NPN" : "U65"
     }
     ---
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-14T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
      "APTCChange" : 1200,
      "PremChange" : 1300,
      "MbrRespChg" : 100,
      "NPN" : "U65"
     }
     -------- 
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-15T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
      "APTCChange" : 16,
      "PremChange" : 0,
      "MbrRespChg" : -200,
       "NPN" : "U65"
     }
     ---------
     {
       id: PremChange,
      "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-16T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 15,
      "MbrRespChg" : -224,
      "NPN" : "U65"
     } 
    -----
   {
       id: MbrRespChg,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-18T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 1,
      "MbrRespChg" : 77,
      "NPN" : "U65"
     }

请建议我如何编写mongodb查询，我写了一个
使用匹配，展开和项目查询，但我没有得到渴望 输出.

解决方案

您可以尝试以下聚合.不确定为什么需要在这里分组.

$match 将历史记录数组过滤到至少一个元素在指定的日期范围内.

$unwind 来扁平化历史记录数组. /p>

$match 可以过滤元素匹配的历史文档指定的日期范围.

$match 可以过滤历史文档，其中关键值大于10.

db.col.aggregate([
  {"$match":{
  "history":{
    "$elemMatch":{
      "startDate":{"$gte":ISODate("2018-01-15T11:13:14.000Z")},
      "endDate":{"$lte":ISODate("2018-02-12T11:13:14.000Z")}
     }
   }
 }},
 {"$unwind":"$history"},
 {"$match":{
   "history.startDate":{"$gte":ISODate("2018-01-15T11:13:14.000Z")}, 
   "history.endDate":{"$lte":ISODate("2018-02-12T11:13:14.000Z")}
 }},
 {"$match":{
   "$or":[
     {"history.APTCChange":{"$gt":10}},
     {"history.PremChange":{"$gt":10}},
     {"history.MbrRespChg":{"$gt":10}}
    ]
 }}
])

I have below type of data: 

    {
        "_id" : "HCCIDM1234567A",
        "RecordT" : "THISAPTC",
        "history" : [ 
    {
        "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
        "APTCChange" : 1200,"PremChange" : 1300,"MbrRespChg" : 100,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
        "APTCChange" : 16,"PremChange" : 0,"MbrRespChg" : -200,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
        "APTCChange" : -16,"PremChange" : 0,
        "MbrRespChg" : -224,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : 15,
        "MbrRespChg" : -224,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : -15,
        "MbrRespChg" : -70,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
        "APTCChange" : -10,"PremChange" : -15,
        "MbrRespChg" : -77, "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
        "APTCChange" : 0,"PremChange" : 1,
        "MbrRespChg" : 77,"NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
        "PremChange" : 0,"APTCChange" : 16,
        "MbrRespChg" : -200,"NPN" : "U65"
    }
]
},
{
"_id" : "HCCIDM1234567B",
"RecordT" : "THISAPTC",
"history" : [ 
    {
        "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
        "APTCChange" : 1200,
        "PremChange" : 1300,
        "MbrRespChg" : 100,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
        "APTCChange" : 16,
        "PremChange" : 0,
        "MbrRespChg" : -200,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
        "APTCChange" : -16,
        "PremChange" : 0,
        "MbrRespChg" : -224,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : 15,
        "MbrRespChg" : -224,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : -15,
        "MbrRespChg" : -70,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
        "APTCChange" : -10,
        "PremChange" : -15,
        "MbrRespChg" : -77,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
        "APTCChange" : 0,
        "PremChange" : 1,
        "MbrRespChg" : 77,
        "NPN" : "U65"
    }, 
    {
        "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
        "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
        "PremChange" : 0,
        "APTCChange" : 16,
        "MbrRespChg" : -200,
        "NPN" : "U65"
    }
]
}, 
{
    "_id" : "HCCIDM1234567C",
    "RecordT" : "THISAPTC",
    "history" : [ 
        {
            "startDate" : ISODate("2018-01-14T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
            "APTCChange" : 1200,
            "PremChange" : 1300,
            "MbrRespChg" : 100,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-15T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-10T11:13:14.000Z"),
            "APTCChange" : 16,
            "PremChange" : 0,
            "MbrRespChg" : -200,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-16T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
            "APTCChange" : -16,
            "PremChange" : 0,
            "MbrRespChg" : -224,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-17T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : 15,
            "MbrRespChg" : -224,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-18T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-06T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : -15,
            "MbrRespChg" : -70,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-19T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-05T11:13:14.000Z"),
            "APTCChange" : -10,
            "PremChange" : -15,
            "MbrRespChg" : -77,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-20T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
            "APTCChange" : 0,
            "PremChange" : 1,
            "MbrRespChg" : 77,
            "NPN" : "U65"
        }, 
        {
            "startDate" : ISODate("2018-01-12T11:13:14.000Z"),
            "endDate" : ISODate("2018-02-23T11:13:14.000Z"),
            "PremChange" : 0,
            "APTCChange" : 16,
            "MbrRespChg" : -200,
            "NPN" : "U65"
        }
    ]
}

Below conditions needs to apply:

  1. startDate $gte ISODate('2018-01-15T11:13:14.000Z') & endDate $lte ISODate('2018-02-12T11:13:14.000Z')

  2. need to group them based on below category

    PremChange>10- records will in one set with limit
    APTCChange>10- records will in one set with limit MbrRespChg>10- records will in one set with limit

Expected result: 

    {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-14T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
      "APTCChange" : 1200,
      "PremChange" : 1300,
      "MbrRespChg" : 100,
      "NPN" : "U65"
     }
     -------- 
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-15T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
      "APTCChange" : 16,
      "PremChange" : 0,
      "MbrRespChg" : -200,
       "NPN" : "U65"
     }
     ---------
     {
       id: PremChange,
      "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-16T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 15,
      "MbrRespChg" : -224,
      "NPN" : "U65"
     } 
    -----
   {
       id: MbrRespChg,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567A',
      'startDate': ISODate("2018-01-18T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 1,
      "MbrRespChg" : 77,
      "NPN" : "U65"
     }
     ---
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-14T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-09T11:13:14.000Z"),
      "APTCChange" : 1200,
      "PremChange" : 1300,
      "MbrRespChg" : 100,
      "NPN" : "U65"
     }
     -------- 
     {
       id: APTCChange,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-15T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-08T11:13:14.000Z"),
      "APTCChange" : 16,
      "PremChange" : 0,
      "MbrRespChg" : -200,
       "NPN" : "U65"
     }
     ---------
     {
       id: PremChange,
      "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-16T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-07T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 15,
      "MbrRespChg" : -224,
      "NPN" : "U65"
     } 
    -----
   {
       id: MbrRespChg,
       "RecordT" : "THISAPTC",
       "hccid':'HCCIDM1234567B',
      'startDate': ISODate("2018-01-18T11:13:14.000Z"),
      "endDate" : ISODate("2018-02-04T11:13:14.000Z"),
      "APTCChange" : 0,
      "PremChange" : 1,
      "MbrRespChg" : 77,
      "NPN" : "U65"
     }

please suggest me how i need to write mongodb query, i wrote a
query using match, unwind and project but i am not getting desire output.

解决方案

You can try below aggregation. Not sure why you need grouping here.

$match to filter histories array to where atleast one element is in the specified date range.

$unwind to flatten the history array.

$match to filter history documents where element matches the specified date range.

$match to filter history documents where key values are greater than 10. 

db.col.aggregate([
  {"$match":{
  "history":{
    "$elemMatch":{
      "startDate":{"$gte":ISODate("2018-01-15T11:13:14.000Z")},
      "endDate":{"$lte":ISODate("2018-02-12T11:13:14.000Z")}
     }
   }
 }},
 {"$unwind":"$history"},
 {"$match":{
   "history.startDate":{"$gte":ISODate("2018-01-15T11:13:14.000Z")}, 
   "history.endDate":{"$lte":ISODate("2018-02-12T11:13:14.000Z")}
 }},
 {"$match":{
   "$or":[
     {"history.APTCChange":{"$gt":10}},
     {"history.PremChange":{"$gt":10}},
     {"history.MbrRespChg":{"$gt":10}}
    ]
 }}
])

这篇关于MongoDB查询-使用组和项目以及匹配和限制展开的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文
相关文章
JavaScript最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆