add revenue now workd through shell command

internal/database/company.go

@@ -0,0 +1,25 @@
+package database
+
+import (
+	"Portifolio/internal/model"
+	"database/sql"
+	"fmt"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func GetCompanyByID(db *sql.DB, id int) (*model.Company, error) {
+	var c model.Company
+	err := db.QueryRow(
+		`SELECT id, name, shares_outstanding, price, currency_id FROM companies WHERE id = ?`,
+		id,
+	).Scan(&c.ID, &c.Name, &c.SharesOutstanding, &c.Price, &c.CurrencyID)
+
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, fmt.Errorf("query company: %w", err)
+	}
+	return &c, nil
+}