[英]Show only records with count greater than certain number using aggregation
I am trying to only show the records which have a sum greater than or equal to four.我试图只显示总和大于或等于四的记录。 This isn't working.这是行不通的。
const bookings = await Booking.aggregate([
{
$group: {
_id: { $dateToString: { format: "%Y-%m-%d", date: "$bookingDate" } },
totalBookings: {
$sum: 1,
},
},
$match: {
sum: { $gte: 4 },
},
},
]);
db.collection.aggregate([
{
$group: {
_id: {
$dateToString: {
format: "%Y-%m-%d",
date: "$bookingDate",
},
},
totalBookings: {
$sum: 1,
},
}
},
{
$match: {
totalBookings: {
$gte: 4,
},
},
},
])
There is a mismatch.存在不匹配。 Your key is totalBookings
but not sum
您的关键是totalBookings
但不是sum
EDIT:编辑:
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.