How does the golang framework interact with NoSQL databases?

package main

import (
    "context"
    "fmt"
    "log"
    "time"

    "gopkg.in/mgo.v2"
)

func main() {
    // 建立连接
    session, err := mgo.Dial("mongodb://localhost:27017")
    if err != nil {
        log.Fatal(err)
    }
    defer session.Close()

    // 获取所选数据库和集合
    db := session.DB("test")
    collection := db.C("users")

    // 插入文档
    if err := collection.Insert(map[string]interface{}{"name": "Alice", "age": 30}); err != nil {
        log.Fatal(err)
    }

    // 查找文档
    result := &struct{ Name string }{Name: ""}
    if err := collection.Find(nil).One(result); err != nil {
        log.Fatal(err)
    }
    fmt.Println("Name:", result.Name)

    // 更新文档
    if _, err := collection.Update(map[string]interface{}{"name": "Alice"}, map[string]interface{}{"age": 31}); err != nil {
        log.Fatal(err)
    }

    // 删除文档
    if err := collection.Remove(map[string]interface{}{"name": "Alice"}); err != nil {
        log.Fatal(err)
    }

}

package main

import (
    "fmt"
    "log"

    "github.com/garyburd/redigo/redis"
)

func main() {
    // 建立连接
    conn, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        log.Fatal(err)
    }
    defer conn.Close()

    // 设置键值对
    if _, err := conn.Do("SET", "name", "Alice"); err != nil {
        log.Fatal(err)
    }

    // 获取值
    name, err := redis.String(conn.Do("GET", "name"))
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println("Name:", name)

    // 删除键
    if _, err := conn.Do("DEL", "name"); err != nil {
        log.Fatal(err)
    }
}

package main

import (
    "fmt"
    "log"
    "time"

    "github.com/gocql/gocql"
)

func main() {
    // 建立连接
    cluster := gocql.NewCluster("localhost:9042")
    session, err := cluster.CreateSession()
    if err != nil {
        log.Fatal(err)
    }
    defer session.Close()

    // 创建表
    if err := session.Query(`CREATE TABLE users (name text, age int, PRIMARY KEY (name))`).Exec(); err != nil {
        log.Fatal(err)
    }

    // 插入数据
    if err := session.Query(`INSERT INTO users (name, age) VALUES (?, ?)`).Bind("Alice", 30).Exec(); err != nil {
        log.Fatal(err)
    }

    // 查询数据
    iter := session.Query(`SELECT * FROM users`).Iter()
    var name string
    var age int
    for iter.Scan(&name, &age) {
        fmt.Println("Name:", name, "Age:", age)
    }
    if err := iter.Close(); err != nil {
        log.Fatal(err)
    }

    // 更新数据
    if err := session.Query(`UPDATE users SET age = ? WHERE name = ?`).Bind(31, "Alice").Exec(); err != nil {
        log.Fatal(err)
    }

    // 删除数据
    if err := session.Query(`DELETE FROM users WHERE name = ?`).Bind("Alice").Exec(); err != nil {
        log.Fatal(err)
    }
}