mongodb equal query
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: ... ,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 ... ,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 ... ,The following operation uses $match to perform a simple equality match: copy ... The $match selects the documents where the author field equals dave , and the ... ,This query will select all documents in the inventory collection where the qty field value does not equal 20 , including those documents that do not contain the qty ... ,$gte, Matches values that are greater than or equal to a specified value. $in, Matches any of the values specified in an array. $lt, Matches values that are less ... ,Query for Equality¶. The following operation returns documents in the bios collection where _id equals 5 : copy. copied. db.bios.find( _id: 5 } ). The following ... ,$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 ... ,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 .
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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 |