使用

package main

import (
	"context"
	"fmt"
	"os"

	"github.com/jackc/pgx/v5/pgxpool"
)

func main() {
// # Example Keyword/Value
	// user=jack password=secret host=pg.example.com port=5432 dbname=mydb sslmode=verify-ca pool_max_conns=10
	// # Example URL
	// postgres://jack:secret@pg.example.com:5432/mydb?sslmode=verify-ca&pool_max_conns=10
	url := "postgres://root:msdnmm@103.71.69.12:5432/bank?sslmode=disable&pool_max_conns=10"
	dbpool, err := pgxpool.New(context.Background(), url)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Unable to create connection pool: %v\n", err)
		os.Exit(1)
	}
	defer dbpool.Close()

	var greeting string
	err = dbpool.QueryRow(context.Background(), "select 'Hello, world!'").Scan(&greeting)
	if err != nil {
		fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
		os.Exit(1)
	}

	fmt.Println(greeting)
}