Post by mamun11 on May 16, 2024 3:39:24 GMT
For example, if we want to obtain only the name and price fields of a product collection that has several fields, we can use the $project operator as follows: db.products.aggregate $project: name: 1, price: 1 fields from each document and displays only those fields in the output. 3.Match $match is another operator used to filter documents that meet certain conditions.
For example, if we want to obtain only sales Burkina Faso Email List documents where the amount field is greater than 100, we can use the $match operator as follows: db.sales.aggregate $match: amount: $gt: 100 This example returns only sales documents where the amount field is greater than 100. 4. Sort The $sort operator is used to sort documents based on one or more fields.
For example, if we want to sort the documents of a collection of products by the price field in descending order, we can use the $sort operator as follows: db.products.aggregate $sort: price: -1 This example sorts the documents by the price field in descending order. 5. Limit The $limit operator is used to limit the number of output documents. For example, if we want to get only the first 10 documents of a collection, we can use the $limit operator as follows: db.
For example, if we want to obtain only sales Burkina Faso Email List documents where the amount field is greater than 100, we can use the $match operator as follows: db.sales.aggregate $match: amount: $gt: 100 This example returns only sales documents where the amount field is greater than 100. 4. Sort The $sort operator is used to sort documents based on one or more fields.
For example, if we want to sort the documents of a collection of products by the price field in descending order, we can use the $sort operator as follows: db.products.aggregate $sort: price: -1 This example sorts the documents by the price field in descending order. 5. Limit The $limit operator is used to limit the number of output documents. For example, if we want to get only the first 10 documents of a collection, we can use the $limit operator as follows: db.
