Golang - Retrieve data from the database continuously.

main.go

package main

import (
	"fmt"
	"time"
)

var data string

func main() {
	// Start a goroutine to periodically retrieve data
	go func() {
		for {
			newData := retrieveData()
			if newData != data {
				data = newData
				fmt.Println("Data updated:", data)
			}
      // 5 second delay
			time.Sleep(time.Second * 5)
		}
	}()

	// Wait forever
	select {}
}

func retrieveData() string {
	// Retrieve data from database or other source
	// ...

	return "retrieved data"
}