純sql api操作MySQL的go實踐，防丟失

1、直接上代碼：

package main

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

func main() {
	fmt.Println("Test MySQL")
	//
	sqlstr := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4", "root", "", "127.0.0.1:3306", "mydata")
	db, err := sql.Open("mysql", sqlstr)
	if err!=nil {
		fmt.Println("", err)
		return
	}
	defer db.Close()
	//查詢
	Query(db)
	//執行
	Exec(db)
	//查詢
	Query(db)
}

//Query
func Query(db *sql.DB)  {
	if db == nil {
		return
	}
	//
	rows, err := db.Query("select * from student")
	for rows.Next() {
		var Uid,Name,Age,ClassId string
		err = rows.Scan(&Uid,&Name,&Age,&ClassId)
		if err != nil {
			panic(err.Error())
		}
		fmt.Println("Uid", "Name", "Age", "ClassId");
		fmt.Println(Uid, Name, Age, ClassId);
	}
}

//Exec
func Exec(db *sql.DB)  {
	if db == nil {
		return
	}
	//
	rs,err := db.Exec("update student set Age=9527 where Name='houwenbin'")
	if err != nil {
		panic(err.Error())
	}
	fmt.Println(rs.RowsAffected())
}

2、運行結果：

Test MySQL
Uid Name Age ClassId
123456                               houwenbin 9527 1
0 <nil>
Uid Name Age ClassId
123456                               houwenbin 9527 1

Process finished with exit code 0