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3-sql-prepare.go
52 lines (42 loc) · 1.05 KB
/
3-sql-prepare.go
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package main
import "fmt"
import "database/sql"
import _ "github.com/go-sql-driver/mysql"
type student struct {
id string
name string
age int
grade int
}
func connect() (*sql.DB, error) {
db, err := sql.Open("mysql", "root:@tcp(127.0.0.1:3306)/db_belajar_golang")
if err != nil {
return nil, err
}
return db, nil
}
func sqlPrepare() {
db, err := connect()
if err != nil {
fmt.Println(err.Error())
return
}
defer db.Close()
stmt, err := db.Prepare("select name, grade from tb_student where id = ?")
if err != nil {
fmt.Println(err.Error())
return
}
var result1 = student{}
stmt.QueryRow("E001").Scan(&result1.name, &result1.grade)
fmt.Printf("name: %s\ngrade: %d\n", result1.name, result1.grade)
var result2 = student{}
stmt.QueryRow("W001").Scan(&result2.name, &result2.grade)
fmt.Printf("name: %s\ngrade: %d\n", result2.name, result2.grade)
var result3 = student{}
stmt.QueryRow("B001").Scan(&result3.name, &result3.grade)
fmt.Printf("name: %s\ngrade: %d\n", result3.name, result3.grade)
}
func main() {
sqlPrepare()
}