mongodb equal query
Specifies equality condition. The $eq operator matches documents where the value of a field equals the specified value. The $eq expression is equivalent to field: <value> } . ,This query would select all documents in inventory where the qty field value is greater than or equal to 20 . Consider the following example which uses the $gte ...
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 mongodb equal query 相關參考資料
$eq (aggregation) — MongoDB Manual
The following operation uses the $eq operator to determine if qty equals 250 : copy. copied. db.inventory.aggregate( [ $project: item: 1, qty: 1, qtyEq250: $eq: ... https://docs.mongodb.com $eq — MongoDB Manual - MongoDB Documentation
Specifies equality condition. The $eq operator matches documents where the value of a field equals the specified value. The $eq expression is equivalent to field: <value> } . https://docs.mongodb.com $gte — MongoDB Manual - MongoDB Documentation
This query would select all documents in inventory where the qty field value is greater than or equal to 20 . Consider the following example which uses the $gte ... https://docs.mongodb.com $lte — MongoDB Manual - MongoDB Documentation
This query will select all documents in the inventory collection where the qty field value is less than or equal to 20 . Consider the following example which uses ... https://docs.mongodb.com $match (aggregation) — MongoDB Manual
The following operation uses $match to perform a simple equality match: copy ... The $match selects the documents where the author field equals dave , and the ... https://docs.mongodb.com $ne — MongoDB Manual
This query will select all documents in the inventory collection where the qty field value does not equal 20 , including those documents that do not contain the qty ... https://docs.mongodb.com Comparison Query Operators — MongoDB Manual
$gte, Matches values that are greater than or equal to a specified value. $in, Matches any of the values specified in an array. $lt, Matches values that are less ... https://docs.mongodb.com db.collection.find() — MongoDB Manual
Query for Equality¶. The following operation returns documents in the bios collection where _id equals 5 : copy. copied. db.bios.find( _id: 5 } ). The following ... https://docs.mongodb.com Query and Projection Operators — MongoDB Manual
$gte, Matches values that are greater than or equal to a specified value. $in, Matches any of the values specified in an array. $lt, Matches values that are less ... https://docs.mongodb.com Query Operators - MongoDB Documentation
This query will select all documents in the inventory collection where either the quantity field value is less than 20 or the price field value equals 10 . https://docs.mongodb.com |