/
main.go
executable file
·72 lines (55 loc) · 1.59 KB
/
main.go
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// Example code for Chapter 5.3 from "Build Web Application with Golang"
// Purpose: Shows how to run simple CRUD operations using a sqlite driver
package main
import (
"database/sql"
"fmt"
_ "github.com/mattn/go-sqlite3"
"time"
)
const DB_PATH = "./foo.db"
func main() {
db, err := sql.Open("sqlite3", DB_PATH)
checkErr(err)
defer db.Close()
fmt.Println("Inserting")
stmt, err := db.Prepare("INSERT INTO userinfo(username, department, created) values(?,?,?)")
checkErr(err)
res, err := stmt.Exec("astaxie", "software developement", time.Now().Format("2006-01-02"))
checkErr(err)
id, err := res.LastInsertId()
checkErr(err)
fmt.Println("id of last inserted row =", id)
fmt.Println("Updating")
stmt, err = db.Prepare("update userinfo set username=? where uid=?")
checkErr(err)
res, err = stmt.Exec("astaxieupdate", id)
checkErr(err)
affect, err := res.RowsAffected()
checkErr(err)
fmt.Println(affect, "row(s) changed")
fmt.Println("Querying")
rows, err := db.Query("SELECT * FROM userinfo")
checkErr(err)
for rows.Next() {
var uid int
var username, department, created string
err = rows.Scan(&uid, &username, &department, &created)
checkErr(err)
fmt.Println("uid | username | department | created")
fmt.Printf("%3v | %6v | %8v | %6v\n", uid, username, department, created)
}
fmt.Println("Deleting")
stmt, err = db.Prepare("delete from userinfo where uid=?")
checkErr(err)
res, err = stmt.Exec(id)
checkErr(err)
affect, err = res.RowsAffected()
checkErr(err)
fmt.Println(affect, "row(s) changed")
}
func checkErr(err error) {
if err != nil {
panic(err)
}
}