~~~ package main import ( "fmt" _ "github.com/go-sql-driver/mysql" "github.com/jmoiron/sqlx" ) type Person struct { UserId int `db:"user_id"` Username string `db:"username"` Sex string `db:"sex"` Email string `db:"email"` } type Place struct { Country string `db:"country"` City string `db:"city"` TelCode int `db:"telcode"` } var Db *sqlx.DB func init() { database, err := sqlx.Open("mysql", "root:root@tcp(127.0.0.1:3306)/test") if err != nil { fmt.Println("open mysql failed,", err) return } Db = database } func main() { res, err := Db.Exec("update person set username=? where user_id=?", "stu0003", 1) if err != nil { fmt.Println("exec failed, ", err) return } row, err := res.RowsAffected() if err != nil { fmt.Println("rows failed, ",err) } fmt.Println("update succ:",row) } ~~~ 运行结果： 第一次运行： ~~~ update succ: 1 #受影响的行数 1 ~~~ 第二次运行： ~~~ update succ: 0 #受影响的行数 0 ~~~