A Database Error Occurred

Error Number: 1054

Unknown column 'ayuda' in 'where clause'

SELECT *, 1 AS cantidad FROM subcategorias WHERE id_categoria = ayuda and id_subcategoria IN (SELECT id_subcategoria FROM productos) UNION SELECT *, 0 AS cantidad FROM subcategorias WHERE id_categoria = ayuda and id_subcategoria NOT IN (SELECT id_subcategoria FROM productos) ORDER BY nombre_subcategoria;