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  • [Database] MongoDB (3) Mongo Query Language 类似Sql语句

    Mongo Query Language 类似 Sql 语句

    $query - 查询类似于sql中的 where
    $orderby - 排序{x:1},1为升序 -1为降序

    $query - 查询类似于sql中的 where
    $orderby - 排序{x:1},1为升序 -1为降序

    //select *from table where name="abeen" order by age asc
    In [
    28]: list(table.find({"$query" : {"name": "abeen"}, "$orderby": { "age": 1 }}))

    //
    select *from table where name="abeen" order by age desc
    In [
    29]: list(table.find({"$query" : {"name": "abeen"}, "$orderby": { "age": -1 }}))

    //select name, address from table where name like '%a%'
    按找指定字段按条件,并可指定排序 1:返回字段,0不返回字段

    In [21]: list(t.find({"name":{"$regex": r".*a.*"}},{"name":1, "address":1}))
    Out[
    23]:
    [{u
    '_id': ObjectId('4c5f9cbc421aa90fb9000000'), u'name': u'abeen'},
    {u
    '_id': ObjectId('4c5f9ccb421aa90fb9000001'), u'name': u'shanshan'},
    {u
    '_id': ObjectId('4c5f9d2d421aa90fb9000002'), u'name': u'shanshan2'},
    {u
    '_id': ObjectId('4c5f9d34421aa90fb9000003'), u'name': u'shanshan3'},
    {u
    '_id': ObjectId('4c5fa2ab421aa90fb9000004'), u'address': u'da zhong si', u'name': u'shanshan3'},
    {u
    '_id': ObjectId('4c5facc6421aa90fb9000005'), u'name': [u'abeen', u'a', u'b', u'e', u'e', u'n']},
    {u
    '_id': ObjectId('4c5fcd7e421aa90fb9000007'), u'name': u'abeen_object'},
    {u
    '_id': ObjectId('4c64b432421aa90697000000'), u'address': u'shandong', u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b438421aa90697000001'), u'address': u'shandong', u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b43d421aa90697000002'), u'address': u'shandong', u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b441421aa90697000003'), u'address': u'shandong', u'name': u'abeen'}]

    0为不返回字段

    In [24]: list(t.find({"name":{"$regex": r".*a.*"}},{"address":0}))
    Out[
    24]:
    [{u
    '_id': ObjectId('4c5f9cbc421aa90fb9000000'), u'age': 27, u'name': u'abeen'},
    {u
    '_id': ObjectId('4c5f9ccb421aa90fb9000001'), u'age': 22, u'name': u'shanshan'},
    {u
    '_id': ObjectId('4c5f9d2d421aa90fb9000002'), u'age': 22, u'name': u'shanshan2'},
    {u
    '_id': ObjectId('4c5f9d34421aa90fb9000003'), u'age': 23, u'name': u'shanshan3'},
    {u
    '_id': ObjectId('4c5fa2ab421aa90fb9000004'), u'age': 23, u'name': u'shanshan3'},
    {u
    '_id': ObjectId('4c5facc6421aa90fb9000005'), u'name': [u'abeen', u'a', u'b', u'e', u'e', u'n']},
    {u
    '_id': ObjectId('4c5fcd7e421aa90fb9000007'), u'name': u'abeen_object'},
    {u
    '_id': ObjectId('4c64b432421aa90697000000'), u'age': 22, u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b438421aa90697000001'), u'age': 23, u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b43d421aa90697000002'), u'age': 24, u'name': u'abeen'},
    {u
    '_id': ObjectId('4c64b441421aa90697000003'), u'age': 18, u'name': u'abeen'}]
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  • 原文地址:https://www.cnblogs.com/abeen/p/1802751.html
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