golang操作mysql

1. 安装mysql驱动库和sqlx基于官方sql库的扩展库

go get github.com/go-sql-driver/mysql
go get github.com/jmoiron/sqlx

　　

2.  链接mysql

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql"  // 初始化mysql驱动
	"github.com/jmoiron/sqlx" // sqlx是一个库，为go标准库database/sql提供了一组扩展
)

var db *sqlx.DB

func init() {
	// 初始化
	database, err := sql.Open("mysql", "username:password@protocal(host:port)/db_name")
	if err != nil {
		fmt.Println("open mysql field", err)
		return
	}

	db = database
}

　　

3.  insert

func main() {
	defer db.Close()

	result, err := db.Exec("insert into person(username, sex, email)values(?,?,?)", "abc", "男", "myn_cn@163.com")
	if err != nil {
		fmt.Println("Exec failed", err)
		return
	}

	lastId, err := result.LastInsertId()
	if err != nil {
		fmt.Println("exec failed", err)
		return
	}

	fmt.Println("insert success", lastId)

}

　　

4.  select

type Person struct {
	Userid int `db:"user_id"`
	Username string `db:"username"`
	Sex string `db:"sex"`
	Email string `db:"email"`
}

func main() {
	defer db.Close()

	var person []Person
	if err := db.Select(&person, "select user_id, username, sex, email from person where user_id = ?;", 2); err != nil {
		fmt.Println("select failed", err)
		return
	}

	fmt.Println("select success", person)

}

　　

5.  update

func main() {
	result, err := db.Exec("update person set username = ? where user_id = ?", "嘿嘿2", 2)
	if err != nil {
		fmt.Println("exec failed", err)
		return
	}

	rows, err := result.RowsAffected()
	if err != nil {
		fmt.Println("exec failed", err)
	}

	fmt.Println("update success", rows)

}

　　

6. delete

func main() {
	result, err := db.Exec("delete from person where user_id = ?", 2)
	if err != nil {
		fmt.Println("exec failed", err)
		return
	}

	rows, err := result.RowsAffected()
	if err != nil {
		fmt.Println("exec failed", err)
	}

	fmt.Println("delete success", rows)

}

　　

7.  mysql事务

func main() {
	conn, err := db.Begin()  // 开启事务

	if err != nil {
		fmt.Println("begin err", err)
		return
	}

	result, err := conn.Exec("insert into person(username, sex, email)values(?,?,?)", "张三", "女", "1341935532@qq.com")
	if err != nil {
		fmt.Println("exec failed", err)
		conn.Rollback()  // 回滚事务
		return
	}

	rows, err := result.RowsAffected()
	if err != nil {
		fmt.Println("exec failed", err)
		conn.Rollback()  // 回滚事务
		return
	}

	conn.Commit()  // 提交事务
	fmt.Println("delete success", rows)

}