mongodb and or not
$ne selects the documents where the value of the field is not equal to the specified value . This includes documents that do not contain the field . For comparison ... ,This query will select all documents in the inventory collection where the qty field value does not equal 5 nor 15 . The selected documents will include those ... ,The exception in returning documents that do not contain the field in the $nor expression is when the $nor operator is used with the $exists operator. ,$not performs a logical NOT operation on the specified <operator-expression> and selects the documents that do not match the <operator-expression> . ,$or (aggregation)¶. On this page. Definition; Behavior; Example. Definition¶. $or ¶. Evaluates one or more expressions and returns true if any of the expressions ... ,When executing $or queries with a sort() , MongoDB can now use indexes that support the $or clauses. Previous versions did not use the indexes. ,$not, Inverts the effect of a query expression and returns documents that do not match the query expression. $nor, Joins query clauses with a logical NOR ... , The MongoDB $not operator performs a logical NOT operation on the given expression and fetches selected documents that do not match the expression and the document that do not contain the field as well, specified in the expression.,MongoDB also has a $nor logical operator that "performs a logical NOR operation ... Not the best as that scans a whole collection, but the negation in your logic ... ,If the first expression (e.g. <expression1> ) evaluates to false , MongoDB will not evaluate the remaining expressions. Note. MongoDB provides an implicit AND ...
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 mongodb and or not 相關參考資料
$ne — MongoDB Manual
$ne selects the documents where the value of the field is not equal to the specified value . This includes documents that do not contain the field . For comparison ... https://docs.mongodb.com $nin — MongoDB Manual
This query will select all documents in the inventory collection where the qty field value does not equal 5 nor 15 . The selected documents will include those ... https://docs.mongodb.com $nor — MongoDB Manual
The exception in returning documents that do not contain the field in the $nor expression is when the $nor operator is used with the $exists operator. https://docs.mongodb.com $not — MongoDB Manual
$not performs a logical NOT operation on the specified <operator-expression> and selects the documents that do not match the <operator-expression> . https://docs.mongodb.com $or (aggregation) — MongoDB Manual
$or (aggregation)¶. On this page. Definition; Behavior; Example. Definition¶. $or ¶. Evaluates one or more expressions and returns true if any of the expressions ... https://docs.mongodb.com $or — MongoDB Manual
When executing $or queries with a sort() , MongoDB can now use indexes that support the $or clauses. Previous versions did not use the indexes. https://docs.mongodb.com Logical Query Operators — MongoDB Manual
$not, Inverts the effect of a query expression and returns documents that do not match the query expression. $nor, Joins query clauses with a logical NOR ... https://docs.mongodb.com MongoDB Logical Query Operator - $and & $not - w3resource
The MongoDB $not operator performs a logical NOT operation on the given expression and fetches selected documents that do not match the expression and the document that do not contain the field as we... https://www.w3resource.com MongoDB using NOT and AND together - Stack Overflow
MongoDB also has a $nor logical operator that "performs a logical NOR operation ... Not the best as that scans a whole collection, but the negation in your logic ... https://stackoverflow.com Query Operators - $and — MongoDB Manual
If the first expression (e.g. <expression1> ) evaluates to false , MongoDB will not evaluate the remaining expressions. Note. MongoDB provides an implicit AND ... https://docs.mongodb.com |