go mod init gin
 
 go mod edit -require github.com/gin-gonic/gin@latest

引入mysql驱动以后，引用包以后，写mysql代码，运行后报错。
mysql.go:6:2: cannot find module providing package github.com/go-sql-driver/mysql: working directory is not part of a mo
dule
用上面两个命令解决。仅供参考。并非万能。
下面是本人具体代码场景

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

func main() {

	db, err := sql.Open("mysql", "xxx:xxx@tcp(localhost:3306)/golang01?charset=utf8")
	if err != nil {
		panic(err)
	}