mongodb match type
The $elemMatch operator matches documents that contain an array field with at least one element that matches all the specified query criteria. copy. copied. ,For comparison of different BSON type values, see the specified BSON ... If the specified <value> is an array, MongoDB matches documents where the <field> ... ,$match takes a document that specifies the query conditions. The query syntax is identical to the read operation query syntax; i.e. $match does not accept raw ... ,Provides regular expression capabilities for pattern matching strings in queries. MongoDB uses Perl compatible regular expressions (i.e. “PCRE” ) version 8.41 ... ,Unlike the $type query operator, which matches array elements based on their BSON type, the $type aggregation operator does not examine array elements. ,A $type expression for a single BSON type has the following syntax: Changed in version 3.2. The above query will match documents where the field value is any of the listed types. The types specified in the array can be either numeric or string aliases. ,BSON is a binary serialization format used to store documents and make remote procedure calls in MongoDB. The BSON specification is located at ... ,Parameter, Type, Description ... Field, Type, Description .... groups the matching documents by the cust_id field and calculates the total for each cust_id field from ... , Actually there is a "gotcha" listed in the documentation for $type specifically about arrays: When applied to arrays, $type matches any inner ..., For comparison of different BSON type values, see the specified BSON ... $gte, Matches values that are greater than or equal to the value ...
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 mongodb match type 相關參考資料
$elemMatch (query) — MongoDB Manual
The $elemMatch operator matches documents that contain an array field with at least one element that matches all the specified query criteria. copy. copied. https://docs.mongodb.com $eq — MongoDB Manual
For comparison of different BSON type values, see the specified BSON ... If the specified <value> is an array, MongoDB matches documents where the <field> ... https://docs.mongodb.com $match (aggregation) — MongoDB Manual
$match takes a document that specifies the query conditions. The query syntax is identical to the read operation query syntax; i.e. $match does not accept raw ... https://docs.mongodb.com $regex — MongoDB Manual
Provides regular expression capabilities for pattern matching strings in queries. MongoDB uses Perl compatible regular expressions (i.e. “PCRE” ) version 8.41 ... https://docs.mongodb.com $type (aggregation) — MongoDB Manual
Unlike the $type query operator, which matches array elements based on their BSON type, the $type aggregation operator does not examine array elements. https://docs.mongodb.com $type — MongoDB Manual
A $type expression for a single BSON type has the following syntax: Changed in version 3.2. The above query will match documents where the field value is any of the listed types. The types specified i... https://docs.mongodb.com BSON Types — MongoDB Manual
BSON is a binary serialization format used to store documents and make remote procedure calls in MongoDB. The BSON specification is located at ... https://docs.mongodb.com db.collection.aggregate() — MongoDB Manual
Parameter, Type, Description ... Field, Type, Description .... groups the matching documents by the cust_id field and calculates the total for each cust_id field from ... https://docs.mongodb.com MongoDB Match an array with $type? - Stack Overflow
Actually there is a "gotcha" listed in the documentation for $type specifically about arrays: When applied to arrays, $type matches any inner ... https://stackoverflow.com MongoDB: 4.MongoDB的條件操作符(1)
For comparison of different BSON type values, see the specified BSON ... $gte, Matches values that are greater than or equal to the value ... http://mongodbcanred.blogspot. |