mongodb query equal
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: ... ,Find Documents that Match Query Criteria¶. Query for Equality¶. The following operation returns documents in the bios collection where _id equals ... ,Matches all values that are not equal to a specified value. $nin, Matches none of the values specified in an array. Logical ... ,The $eq operator matches documents where the value of a field equals the specified value. The $eq operator is equivalent to using the form field: <value> } except when the <value> is a regular expression. ,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 ... ,Matches all values that are not equal to a specified value. $nin, Matches none of the values specified in an array. ← Query and ... ,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 ... ,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 ... ,Although you can express this query using the $or operator, choose the $in operator rather than the $or operator when performing equality checks on the same ... ,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 ...
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 mongodb query equal 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 db.collection.find() - MongoDB documentation
Find Documents that Match Query Criteria¶. Query for Equality¶. The following operation returns documents in the bios collection where _id equals ... https://docs.mongodb.com Query and Projection Operators — MongoDB Manual
Matches all values that are not equal to a specified value. $nin, Matches none of the values specified in an array. Logical ... https://docs.mongodb.com eq - MongoDB documentation
The $eq operator matches documents where the value of a field equals the specified value. The $eq operator is equivalent to using the form field: <value> } except when the <value> is a re... 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
Matches all values that are not equal to a specified value. $nin, Matches none of the values specified in an array. ← Query and ... https://docs.mongodb.com gte - 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 $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 $in — MongoDB Manual
Although you can express this query using the $or operator, choose the $in operator rather than the $or operator when performing equality checks on the same ... https://docs.mongodb.com lte - 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 |