mongodb and or not
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.
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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 |