Notice: Undefined index: asiento in C:\Apache24\htdocs\test\ventas\muestraplan.php on line 138

Fatal error: Uncaught PDOException: SQLSTATE[42000]: [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Incorrect syntax near the keyword 'ORDER'. in C:\Apache24\htdocs\test\ventas\muestraplan.php:88 Stack trace: #0 C:\Apache24\htdocs\test\ventas\muestraplan.php(88): PDOStatement->execute() #1 C:\Apache24\htdocs\test\ventas\muestraplan.php(143): calcInt('') #2 {main} thrown in C:\Apache24\htdocs\test\ventas\muestraplan.php on line 88