Fatal error: Uncaught mysqli_sql_exception: 'siwer_siclon.boleta_det.ID_LIBRO' isn't in GROUP BY in /home/siclondellibro/public_html/config/conexion.php:22
Stack trace:
#0 /home/siclondellibro/public_html/config/conexion.php(22): mysqli->query('SELECT boleta_d...')
#1 /home/siclondellibro/public_html/index.php(49): ejecutarConsulta('SELECT boleta_d...')
#2 {main}
thrown in /home/siclondellibro/public_html/config/conexion.php on line 22