【NoSQL数据库技术与应用】【课本代码】【课后题答案】【持续更新】

一、课本代码

第1章 初识NoSQL

第2章 文档存储数据库MongoDB

第3章 MongoDB数据库操作

插入数据

db.comment.insert(
	{"articleid":"100000","content":"今天天气真好，阳光明媚","userid":"1001",
	"nickname":"Rose","age":"20","phone":"18807141995","createdatetime":new Date(),
	"likenum":NumberInt(10),"state":null}
)

db.comment.insertMany([{"_id":"1","articleid":"100001","content":"清晨，我们不该把事件浪费在手机上，健康很重要，喝一杯温水，幸福你我他。","userid":"1002","nickname":"相忘于江湖","age":"25","phone":{"homePhone":"82174911","mobilePhone":"13065840128"},"createdatetime":new Date("2020-01-02 09:08:15"),"likenum":NumberInt(1000),"state":"1"},{"_id":"2","articleid":"100001","content":"我夏天空腹喝凉开水，冬天喝温开水","userid":"1003","nickname":"伊人憔悴","age":"22","phone":"13442031624","createdatetime":new Date("2020-01-02 10:20:40"),"likenum":NumberInt(888),"state":"1"},{"_id":"3","articleid":"100001","content":"夏天和冬天，我都喝凉开水","userid":"1004","nickname":"杰克船长","age":"28","phone":"1393716334","createdatetime":new Date("2020-01-02 19:56:09"),"likenum":NumberInt(666),"state":null},{"_id":"4","articleid":"100001","content":"专家说不能空腹喝冰水，影响健康","userid":"1005","nickname":"罗密欧","age":"18","phone":"15813134403","createdatetime":new Date("2020-01-03 11:26:29"),"likenum":NumberInt(2000),"state":"1"},{"_id":"5","articleid":"100001","content":"研究表明，刚烧开的水千万不要喝，因为烫嘴","userid":"1005","nickname":"罗密欧","age":"18","phone":"15813134403","createdatetime":new Date("2020-01-03 15:10:37"),"likenum":NumberInt(3000),"state":"1"},{"_id":"6","articleid":"100001","content":"喝水是生命体通过口腔摄入水分的方式，人体每天通过口腔摄入的液体大概有2升","userid":"1006","nickname":"爱德华","age":"30","phone":{"homePhone":"62771541","mobilePhone":"13262984142"},"createdatetime":new Date("2020-01-03 15:10:37"),"likenum":NumberInt(3000),"state":"1"}
])

更新数据

db.comment.update({"content":"喝水是生命体通过口腔摄入水分的方式，人体每天通过口腔摄入的液体大概有2升"},{$set:{"content":"喝水增加了尿量，能使有害物质及时排出体内"}})

文档查询

#按条件查询文档
db.comment.find({$and:[{"userid":"1005","nickname":"罗密欧"}]}).pretty()
db.comment.find({$or:[{"userid":"1002","userid":"1003"}]}).pretty()
db.comment.find({"userid":{$gt:"1005"}}).pretty()
db.comment.find({"userid":{$lt:"1004"}}).pretty()
db.comment.find({"userid":{$gte:"1005"}}).pretty()
db.comment.find({"userid":{$lte:"1003"}}).pretty()
db.comment.find({"userid":{$ne:"1005"}}).pretty()
db.comment.find({"_id":{$in:["1","3"]}}).pretty()
db.comment.find({"_id":{$nin:["1","3","5"]}}).pretty()


#按特定类型查询文档
db.comment.find({"state":null}).pretty()
db.comment.find({"content":/^专家/}).pretty()
db.comment.find({"phone":{"homePhone":"62771541","mobilePhone":"13262984142"}}).pretty()
db.comment.find({"phone.homePhone":"82174911"}).pretty()

聚合管道操作

db.comment.aggregate([{$group:{"_id":"$userid"}}]).pretty()
db.comment.aggregate({$limit:3}).pretty()
db.comment.aggregate([{$match:{"nickname":"罗密欧"}}]).pretty()
db.comment.aggregate([{$sort:{"age":-1}}]).pretty()
db.comment.aggregate([{$project:{"_id":0}}]).pretty()
db.comment.aggregate({$skip:4}).pretty()

#创建一个集合product
db.createCollection("product")
show collections
db.product.insertMany([
{"_id":"1","name":"iPhone8","price":3000,"type":"电子通信"},
{"_id":"2","name":"adidas neo","price":700,"type":"服装"},
{"_id":"3","name":"nike air max 90","price":760,"type":"服装"},
{"_id":"4","name":"HuaWei mate30","price":5000,"type":"电子通信"},
{"_id":"5","name":"vivo x27","price":2000,"type":"电子通信"},
])

db.product.aggregate([{$group:{"_id":"$type","price":{$sum:"$price"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","price":{$avg:"$price"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","price":{$min:"$price"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","price":{$max:"$price"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","tags":{$push:"$price"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","product":{$first:"$name"}}}]).pretty()
db.product.aggregate([{$group:{"_id":"$type","product":{$last:"$name"}}}]).pretty()

Map-Reduce操作

db.comment.mapReduce(
	function(){emit(this.nickname,1);},
	function(key,values){return Array.sum(values)},
	{
		query:{state:"1"},
		out:"comment_total"
	}
)

db.comment_total.find()

索引操作

#查看索引
db.comment.getIndexes()

#查看索引大小
db.comment.totalIndexSize()

#创建索引
db.comment.createIndex({userid:1})
db.comment.getIndexes()

db.comment.createIndex({userid:1,nickname:-1})
db.comment.getIndexes()

#删除索引
db.comment.dropIndex({userid:1})
db.comment.getIndexes()

db.comment.createIndex({userid:1})
db.comment.dropIndexes()
db.comment.getIndexes()

第4章 MongoDB副本集

第5章 MongoDB分片

第6章 MongoDB GridFS

第7章 键值对存储数据库Redis

第8章 列式存储数据库HBase

第9章 图形存储数据库Neo4j

第10章 综合案例–二手房交易数据分析系统

二、课后答案

第1章 初识NoSQL

第2章 文档存储数据库MongoDB

第3章 MongoDB数据库操作

第4章 MongoDB副本集

第5章 MongoDB分片

第6章 MongoDB GridFS

第7章 键值对存储数据库Redis

第8章 列式存储数据库HBase

第9章 图形存储数据库Neo4j

第10章 综合案例–二手房交易数据分析系统

Reference

1.NOSQL数据库习题/CSDN@煮酒、

2.NOSQL——第三章/CSDN@煮酒、

3.【NoSQL数据库技术与应用】-- MongoDB数据库操作/CSDN@⚆Pearl