查询

此示例显示如何使用 database/sql 查​​询数据库，以 MySql 数据库为例。

package main

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

func main() {
    dsn := "mysql_username:CHANGEME@tcp(localhost:3306)/dbname"

    db, err := sql.Open("mysql", dsn)
    if err != nil {
        log.Fatal(err)
    }
    defer sql.Close()

    rows, err := db.Query("select id, first_name from user limit 10")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()

    for rows.Next() {
        var id int
        var username string
        if err := rows.Scan(&id, &username); err != nil {
            log.Fatal(err)
        }
        fmt.Printf("%d-%s\n", id, username)
    }
}