该 delete 命令用于从集合中删除文档。 可以根据指定的查询筛选器删除单个文档或多个文档。
语法
命令的基本语法 delete 如下所示：
db.collection.deleteOne(
<filter>,
<options>
)
db.collection.deleteMany(
<filter>,
<options>
)
参数
| 参数 | DESCRIPTION |
|---|---|
<filter> |
指定删除条件的文档。 仅删除与筛选器匹配的文档 |
options |
可选。 一个指定删除操作选项的文档。 常见选项包括 writeConcern 和排序规则 |
示例
请查看 StoreData 数据库中 stores 集合的这个示例文档。
{
"_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
}
]
}
]
}
示例 1 - 删除集合中的所有文档
db.stores.deleteMany({})
示例 2 - 删除与指定查询筛选器匹配的文档
db.stores.deleteOne({"_id": "68471088-4d45-4164-ae58-a9428d12f310"})
示例 3 - 删除与指定查询筛选器匹配的所有文档
db.stores.deleteMany({"promotionEvents.discounts.discountPercentage": 21}, {"limit": 0})
示例 3 - 仅删除与指定查询筛选器匹配的许多文档之一
db.stores.deleteMany({"promotionEvents.discounts.discountPercentage": 21}, {"limit": 1})