go语言:数据库操作之MySql

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package main

import (
	"database/sql"
	_ "github.com/Go-SQL-Driver/MySQL"
	"log"
)

func initMysql() *sql.DB {
	//打开数据库连接Open(驱动名,连接字符串)
	db, err := sql.Open("mysql", "root:root@tcp(127.0.0.1:3306)/test?charset=utf8")
	if err != nil {
		log.Fatal(err)
	}
	return db
}
func query() {
	db := initMysql()
	defer db.Close()
	row, err := db.Query("select * from user")
	if err != nil {
		log.Fatal(err)
	}
	var name string = ""
	var id int = 0
	var password string = ""
	for row.Next() {
		row.Scan(&name, &id, &password)
		log.Println("id:", id, ",name:", name, "password:", password)
	}
}
func insert() {
	db := initMysql()
	defer db.Close()
	result, _ := db.Exec("insert into user values(?,?,?)", "test", 2, "test")
	c, _ := result.RowsAffected()
	log.Println("add affected rows:", c)

}
func delete() {
	db := initMysql()
	defer db.Close()
	result, _ := db.Exec("delete from user where id = ?", 2)
	c, _ := result.RowsAffected()
	log.Println("delete affected rows:", c)
}
func update() {
	db := initMysql()
	defer db.Close()
	result, _ := db.Exec("update user set password = ? where id = ?", "kk", 1)
	c, _ := result.RowsAffected()
	log.Println("update affected rows:", c)
}
func main() {
	insert()
	query()
	delete()
	update()
}

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