import oracledb

try:
    conn = oracledb.connect(user='sisvietnam', password='sisvietnam', dsn='localhost:1521/sisvietnam')
    cursor = conn.cursor()
    cursor.execute("SELECT COUNT(*) FROM sis_doctor")
    print(f"Doctors in Oracle: {cursor.fetchone()[0]}")
    conn.close()
except Exception as e:
    print(f"Oracle error: {e}")