此 delete 指令用於從集合中移除文件。 根據指定的查詢篩選條件，可以刪除單一或多份文件。
語法
指令 delete 的基本語法如下：
db.collection.deleteOne(
<filter>,
<options>
)
db.collection.deleteMany(
<filter>,
<options>
)
參數
| 參數 | Description |
|---|---|
<filter> |
一份明確規定刪除標準的文件。 只有符合篩選條件的文件會被刪除 |
options |
選擇性。 一份指定刪除操作選項的文件。 常見的選項包括 writeConcern 和 collation |
範例
請參考 StoreData 資料庫中 stores collection 的這份範例文件。
{
"_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
}
]
}
]
}
範例 1 - 刪除集合中的所有文件
db.stores.deleteMany({})
範例 2 - 刪除符合指定查詢過濾器的文件
db.stores.deleteOne({"_id": "68471088-4d45-4164-ae58-a9428d12f310"})
範例 3 - 刪除所有符合指定查詢過濾器的文件
db.stores.deleteMany({"promotionEvents.discounts.discountPercentage": 21}, {"limit": 0})
範例 3 - 只刪除符合指定查詢過濾器的眾多文件中的一份
db.stores.deleteMany({"promotionEvents.discounts.discountPercentage": 21}, {"limit": 1})