该 $nor 运算符对表达式数组执行逻辑 NOR 运算，并选择所有指定表达式失败的文档。
{
$nor: [{
< expression1 >
}, {
< expression2 >
}, ..., {
< expressionN >
}]
}
| 参数 | DESCRIPTION |
|---|---|
expression |
表达式数组，所有这些表达式都必须为 false 才能包含文档 |
请考虑存储集合中的此示例文档。
{
"_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
"name": "First Up Consultants | Beverage Shop - Satterfieldmouth",
"location": {
"lat": -89.2384,
"lon": -46.4012
},
"staff": {
"totalStaff": {
"fullTime": 8,
"partTime": 20
}
},
"sales": {
"totalSales": 75670,
"salesByCategory": [
{
"categoryName": "Wine Accessories",
"totalSales": 34440
},
{
"categoryName": "Bitters",
"totalSales": 39496
},
{
"categoryName": "Rum",
"totalSales": 1734
}
]
},
"promotionEvents": [
{
"eventName": "Unbeatable Bargain Bash",
"promotionalDates": {
"startDate": {
"Year": 2024,
"Month": 6,
"Day": 23
},
"endDate": {
"Year": 2024,
"Month": 7,
"Day": 2
}
},
"discounts": [
{
"categoryName": "Whiskey",
"discountPercentage": 7
},
{
"categoryName": "Bitters",
"discountPercentage": 15
},
{
"categoryName": "Brandy",
"discountPercentage": 8
},
{
"categoryName": "Sports Drinks",
"discountPercentage": 22
},
{
"categoryName": "Vodka",
"discountPercentage": 19
}
]
},
{
"eventName": "Steal of a Deal Days",
"promotionalDates": {
"startDate": {
"Year": 2024,
"Month": 9,
"Day": 21
},
"endDate": {
"Year": 2024,
"Month": 9,
"Day": 29
}
},
"discounts": [
{
"categoryName": "Organic Wine",
"discountPercentage": 19
},
{
"categoryName": "White Wine",
"discountPercentage": 20
},
{
"categoryName": "Sparkling Wine",
"discountPercentage": 19
},
{
"categoryName": "Whiskey",
"discountPercentage": 17
},
{
"categoryName": "Vodka",
"discountPercentage": 23
}
]
}
]
}
若要查找没有超过 15 名全职员工和 20 多名兼职员工的商店，请在这两个条件中与 $nor 操作员运行查询。 然后，仅投影结果集中存储区的名称和员工字段。
db.stores.find({
$nor: [{
"staff.totalStaff.fullTime": {
$gt: 15
}
}, {
"staff.totalStaff.partTime": {
$gt: 20
}
}]
}, {
"name": 1,
"staff": 1
})
此查询返回的前两个结果为：
[
{
"_id": "a715ab0f-4c6e-4e9d-a812-f2fab11ce0b6",
"name": "Lakeshore Retail | Holiday Supply Hub - Marvinfort",
"staff": {
"totalStaff": {
"fullTime": 9,
"partTime": 18
}
}
},
{
"_id": "923d2228-6a28-4856-ac9d-77c39eaf1800",
"name": "Lakeshore Retail | Home Decor Hub - Franciscoton",
"staff": {
"totalStaff": {
"fullTime": 7,
"partTime": 6
}
}
}
]
若要在 2024 年 9 月查找销售超过 10 万美元的商店，而不销售“数字手表”，或者在 2024 年 9 月没有促销的情况下，请在所有三个条件下使用 $nor 操作员运行查询。 最后，仅投影结果集中商店的名称、销售和促销事件。
db.stores.find({
$nor: [{
"sales.totalSales": {
$gt: 100000
}
}, {
"sales.salesByCategory.categoryName": "Digital Watches"
}, {
"promotionEvents": {
$elemMatch: {
"promotionalDates.startDate.Month": 9,
"promotionalDates.startDate.Year": 2024
}
}
}]
}, {
"name": 1,
"sales": 1,
"promotionEvents": 1
})
此查询返回的结果之一是：
[
{
"_id": "7954bd5c-9ac2-4c10-bb7a-2b79bd0963c5",
"name": "Lakeshore Retail | DJ Equipment Stop - Port Cecile",
"sales": {
"salesByCategory": [
{
"categoryName": "DJ Headphones",
"totalSales": 35921
}
],
"fullSales": 3700
},
"promotionEvents": [
{
"eventName": "Bargain Blitz Days",
"promotionalDates": {
"startDate": {
"Year": 2024,
"Month": 3,
"Day": 11
},
"endDate": {
"Year": 2024,
"Month": 2,
"Day": 18
}
},
"discounts": [
{
"categoryName": "DJ Turntables",
"discountPercentage": 18
},
{
"categoryName": "DJ Mixers",
"discountPercentage": 15
}
]
}
]
}
]