go语言学习----mysql的操作

package mainimport (    "database/sql"    "fmt"    _ "github.com/go-sql-driver/mysql"    "log")func main() {    db, err := sql.Open("mysql", "chenxun:123456@tcp(202.120.1.1:330)/ppserver?charset=utf8")    if err != nil {        log.Fatalf("Open database error: %s\n", err)    }    defer db.Close()    rows, err := db.Query("SELECT userId, nickName FROM userInfo where userId = 1")    if err != nil {        log.Println(err)    }    defer rows.Close()    var userId int    var nickName string    for rows.Next() {        err := rows.Scan(&userId, &nickName)        if err != nil {            log.Fatal(err)        }        log.Println(userId, nickName)    }    err = rows.Err()    if err != nil {        log.Fatal(err)    }}func checkErr(err error) {    if err != nil {        panic(err)    }}