Golang接続MySqlデータベースの使用方法

package main

import (
	"database/sql"
	"fmt"
	_ "github.com/go-sql-driver/mysql"
)

var (
	dbhostsip  = "127.0.0.1:3306"//IP  
	dbusername = "root"//   
	dbpassword = "123456"//  
	dbname     = "Test"//  
)

func main() {
	db, err := sql.Open("mysql", "root:123456@tcp(127.0.0.1:3306)/Test?charset=utf8")
	checkErr(err)

	//    
	stmt, err := db.Prepare("INSERT userinfo SET username=?,departname=?,created=?")
	checkErr(err)

	res, err := stmt.Exec("  ", "    ", "2016-03-06")
	checkErr(err)

	id, err := res.LastInsertId()
	checkErr(err)

	fmt.Println(id)
	//    
	stmt, err = db.Prepare("update userinfo set username=? where uid=?")
	checkErr(err)

	res, err = stmt.Exec("    ", id)
	checkErr(err)

	affect, err := res.RowsAffected()
	checkErr(err)

	fmt.Println(affect)

	//    
	rows, err := db.Query("SELECT * FROM userinfo")
	checkErr(err)

	for rows.Next() {
		var uid int
		var username string
		var department string
		var created string
		err = rows.Scan(&uid, &username, &department, &created)
		checkErr(err)
		fmt.Println(uid)
		fmt.Println(username)
		fmt.Println(department)
		fmt.Println(created)
	}

	//    
	stmt, err = db.Prepare("delete from userinfo where uid=?")
	checkErr(err)

	res, err = stmt.Exec(id)
	checkErr(err)

	affect, err = res.RowsAffected()
	checkErr(err)

	fmt.Println(affect)

	db.Close()

}

func checkErr(err error) {
	if err != nil {
		panic(err)
	}
}

SQL:

CREATE TABLE `userinfo` (
    `uid` INT(10) NOT NULL AUTO_INCREMENT,
    `username` VARCHAR(64) NULL DEFAULT NULL,
    `departname` VARCHAR(64) NULL DEFAULT NULL,
    `created` DATE NULL DEFAULT NULL,
    PRIMARY KEY (`uid`)
)

CREATE TABLE `userdetail` (
    `uid` INT(10) NOT NULL DEFAULT '0',
    `intro` TEXT NULL,
    `profile` TEXT NULL,
    PRIMARY KEY (`uid`)
)

Go MySqlパッケージアドレス:github.com/go-sql-driver/mysql
この文書の参照:https://github.com/astaxie/build-web-application-with-golang