MongoDB 数据库的概念以增删改查

// 插入多条数据用{},{}隔开
db.xiaopangpang.insertMany([{
    "name":"xuexue",
    "age":29,
    "hobby":["继继","帅爆太阳的男人","帅爆太阳那人"]
}])
db.xiaopangpang.insertMany([{
    "name":"xiaoxue",
    "age":28,
    "hobby":["帅爆太阳的men", "帅爆太阳的gentleman","帅爆太阳的行者"]
}])
db.xiaopangpang.insertMany([{
    "name":"xueren",
    "age":27,
    "hobby":["多想再见你","哪怕匆匆一眼","就离去"]
}])

db.xiaopangpang.insertOne({
    "name":"miss",
    "age":26,
    
})

})
// 更新编辑数据的操作
db.xiaopangpang.updateOne({"name":"xiaoxueza"},{$set:{"name":"laingxue"}})
db.xiaopangpang.updateMany({"age":{$gt:28}},{$set:{"age":30}})
db.xiaopangpang.find()

// 删除数据remove({})什么都不加把表里的数据都删除
db.xiaopangpang.remove({})
db.xiaopangpang.find({
    "name":"miss"
})
// 删除表里边的数据
db.xiaopangpang.deleteOne({"name":"xiaoxue"})
db.xiaopangpang.find()
db.xiaopangpang.insertOne({
    "name":"jdhjasfho",
    "age":23,
    "hobby":["fmkljfl","daf"]
})

// 大胖胖的表的增删该查
// 查看所有的表
show tables
db.dapangpang.find({})

// 修改器
db.dapangpang.updateOne({"name":"雪雪"},{$set:{"name":"雪雪"}})
//$unset 简单粗暴的删除字段
db.dapangpang.updateOne({"name":"雪雪"},{$unset:{"name":"雪雪"}})
db.dapangpang.insertOne({
    "name":"雪人",
    "hobby":[
        "me", 
        "my", 
        "i", 
        "miss"
        ]
})
// 插入年龄的字段
db.dapangpang.updateMany({},{$set:{"age":26}})
// $inc引用增加
db.dapangpang.updateMany({"name":"雪ren"},{$inc:{"age":2}})
db.dapangpang.remove({})
db.dapangpang.insertMany([{
    "name":"雪雪",
    "hobby":[
        "帅爆太阳的男人", "帅爆太阳那人", "帅爆太阳的men"
        ],
        "age":27
}, 
{
    "name":"小雪",
    "hobby":[
        "花落翩翩", "时光旋转","慢慢沦陷"
        ],
        "age":26
}])

// array操作,在array中添加一个新的元素
db.dapangpang.updateOne({"name":"雪人"},{$push:{"hobby":"miss"}})

// pull在array中删除一个的元素
db.dapangpang.updateOne({"name":"雪雪"},{$pull:{"hobby":"帅爆太阳那人"}})

//pop不含索引-1,从前往后, 1从后往前
db.dapangpang.updateOne({"name":"小雪"},{$pop:{"hobby":1}})
db.dapangpang.updateOne({"name":"小雪"},{$pop:{"hobby":-1}})

//保留索引条件数据的下标,实际是定位到那个字典或者列表
db.dapangpang.updateOne({"hobby":"me"},{$set:{"hobby.$":"it‘s ok!"}})

// Object字典的操作
db.dapangpang.updateOne({"name":"雪雪"},{$set:{feature:["perfect", "lovely","stubborn"]}})
db.dapangpang.updateOne({"name":"雪雪"},{$set:{feature:{"size":32,}}})
db.dapangpang.updateOne({"name":"雪雪"},{$inc:{"feature.size":5}})

// 修改hobby中的big
db.dapangpang.updateOne({"hobby.depth":6},{$set:{"hobby.$.big":26}})

//limit表示从当前位置选择若干个
db.dapangpang.find({}).limit(2)
// skip跳过
db.dapangpang.find({}).skip(2)
// sort排序
db.dapangpang.find({}).sort({age:-1})
db.dapangpang.find({}).sort({"name":1})
// limit + skip + sort 分页
// 优先级最高的为sort
// 其次为skip
// 最低级为limit
db.dapangpang.find({}).limit(1).sort({age:-1}).skip(1)

import pymongo
from bson import ObjectId

# 连接mongo服务器
mongo_client = pymongo.MongoClient(host="127.0.0.1", port=27017)
MONGO = mongo_client.get_database("xuexue")
tb = MONGO.get_collection("dapangpang")
print(tb)

# 查询数据库
res = tb.find()
print(res, type(res))
for data in res:
    print(data)
res1 = tb.find_one({"name": "雪雪"})
print(res1)
res2 = tb.find({"$or":[{"name":"小雪"}, {"hobby": "帅爆太阳的男人"}]})
for data in res2:
    print(data)

res_obj = tb.find_one({"_id":ObjectId(res1["_id"])})
print(res_obj)

# 增加数据
# res = tb.insert_one({"name": "雷子", "age": 24,"hobby":["健身", "学习", "小说"]})
# print(res,res.inserted_id)
# ret = tb.find_one({"name":"雷子"})
# print(ret)
# res1 = tb.insert_many([{
#     "name": "郝哥", "age": 27, "hobby":["宋 ", "振", "中"]},
#     {"name": "佳丽", "age": 27, "hobby": ["还真不了解", "也不知道为什么", "  可能是鬼迷心窍了吧 "]}
# ])
# print(res1)
# ret1 = tb.find_one({"name": "郝哥"})
# ret2 = tb.find_one({"name": "佳丽"})
# print(ret1, ret2)
# ret3 = tb.find()
# for data in ret3:
#     print(data)

# 修改数据
res = tb.update_one({"name": "佳丽"}, {"$set": {"age": 27}})
print(res,dir(res), res.raw_result)
ret = tb.find_one({"name": "佳丽"})
print(ret)

# 删除数据
# res = tb.delete_one({"name": "雷子"})
# print(res, dir(res), res.raw_result)
# res1 = tb.delete_many({"name": "郝哥"})
# print(res1, res1.raw_result)
# res = tb.find()
# for data in res:
#     print(data)
# print(res)