src/database/sql/example_test.go

// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package sql_test

import (
	"database/sql"
	"fmt"
	"log"
)

var db *sql.DB

func ExampleDB_Query() {
	age := 27
	rows, err := db.Query("SELECT name FROM users WHERE age=?", age)
	if err != nil {
		log.Fatal(err)
	}
	defer rows.Close()
	for rows.Next() {
		var name string
		if err := rows.Scan(&name); err != nil {
			log.Fatal(err)
		}
		fmt.Printf("%s is %d\n", name, age)
	}
	if err := rows.Err(); err != nil {
		log.Fatal(err)
	}
}

func ExampleDB_QueryRow() {
	id := 123
	var username string
	err := db.QueryRow("SELECT username FROM users WHERE id=?", id).Scan(&username)
	switch {
	case err == sql.ErrNoRows:
		log.Printf("No user with that ID.")
	case err != nil:
		log.Fatal(err)
	default:
		fmt.Printf("Username is %s\n", username)
	}
}