Golang Mysql 增刪改查

package main

import (

    "database/sql"

    "fmt"

    _ "github.com/go-sql-driver/mysql"

)

func main() {

 

//連接數據庫

    db, err := sql.Open("mysql", "root:@tcp(127.0.0.1:3306)/gupiao?charset=utf8")

    if err != nil {

        panic(err)

    }

//關閉數據庫
defer db.Close()

 

//增加數據

    stmt, err := db.Prepare(`INSERT student (name,age) values (?,?)`)

    res, err := stmt.Exec("wangwu", 26)

    id, err := res.LastInsertId()

    fmt.Println("自增id=", id)

 

//修改數據

    stmt, _ = db.Prepare(`UPDATE student SET age=? WHERE id=?`)

    res, err = stmt.Exec(21, 5)

    num, err := res.RowsAffected() //影響行數

    fmt.Println(num)

 

//刪除數據

    stmt, err = db.Prepare(`DELETE FROM student WHERE id=?`)

    res, err = stmt.Exec(5)

    num, err = res.RowsAffected()

    fmt.Println(num)

 

//查詢數據

    rows, err := db.Query("SELECT userId,userName,userAge,userSex FROM student")

    for rows.Next() {

        var userId int

        var userName string

        var userAge int

        var userSex int

        rows.Columns()

        err = rows.Scan(&userId, &userName, &userAge, &userSex)

        fmt.Println(userId)

        fmt.Println(userName)

        fmt.Println(userAge)

        fmt.Println(userSex)

    }

}