环境
MacOS10.14.4
安装
brew tap mongodb/brew
brew install mongodb-community@4.0
运行
in the foreground
mongod --config /usr/local/etc/mongod.conf
as a macOS service
brew services start mongodb-community@4.0
连接并使用
mongo
基本操作
Create 增
插入一个
db.inventory.insertOne(
{ item: "canvas", qty: 100, tags: ["cotton"], size: { h: 28, w: 35.5, uom: "cm" } }
)
插入多个
db.inventory.insertMany([
{ item: "journal", qty: 25, tags: ["blank", "red"], size: { h: 14, w: 21, uom: "cm" } },
{ item: "mat", qty: 85, tags: ["gray"], size: { h: 27.9, w: 35.5, uom: "cm" } },
{ item: "mousepad", qty: 25, tags: ["gel", "blue"], size: { h: 19, w: 22.85, uom: "cm" } }
])
Read 查
查询单个
db.inventory.find( { item: "canvas" } )
查询所有
db.inventory.find( {} )
利用操作符指定查询条件
db.inventory.find( { status: { $in: [ "A", "D" ] } } )
含义等价于
SELECT * FROM inventory WHERE status in ("A", "D")
AND
db.inventory.find( { status: "A", qty: { $lt: 30 } } )
含义等价于
SELECT * FROM inventory WHERE status = "A" AND qty < 30
OR
db.inventory.find( { $or: [ { status: "A" }, { qty: { $lt: 30 } } ] } )
含义等价于
SELECT * FROM inventory WHERE status = "A" OR qty < 30
AND OR
db.inventory.find( {
status: "A",
$or: [ { qty: { $lt: 30 } }, { item: /^p/ } ]
} )
含义等价于
SELECT * FROM inventory WHERE status = "A" AND ( qty < 30 OR item LIKE "p%")
Update 改
update one
db.inventory.updateOne(
{ item: "paper" },
{
$set: { "size.uom": "cm", status: "P" },
$currentDate: { lastModified: true }
}
)
update many
db.inventory.updateMany(
{ "qty": { $lt: 50 } },
{
$set: { "size.uom": "in", status: "P" },
$currentDate: { lastModified: true }
}
)
replace one
db.inventory.replaceOne(
{ item: "paper" },
{ item: "paper", instock: [ { warehouse: "A", qty: 60 }, { warehouse: "B", qty: 40 } ] }
)
Delete 删
delete all
db.inventory.deleteMany({})
delete many
db.inventory.deleteMany({ status : "A" })
delete one
db.inventory.deleteOne( { status: "D" } )