Créer des vues pour des Requêtes Sql

Bonjour;

Cette requête contient une projection et un filtrage et aprés la création de vue et lors de l’exécution du requête j'ai cette erreur :

ERROR 1054 (42S22): Unknown column 'l_quantity' in 'field list'

V1 : Q1_Project_lineitem

Create view Q1_Project_lineitem As select  l_returnflag ,l_linestatus, sum(l_quantity) as sum_qty,sum(l_extendedprice) as sum_base_price,sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,sum(l_extendedprice * (1 - l_discount) * (1 +l_tax)) as sum_charge,avg(l_quantity) as avg_qty,avg(l_extendedprice) as avg_price,avg(l_discount) as avg_disc,count(*) as count_order from lineitem   group by l_returnflag, l_linestatus order by l_returnflag, l_linestatus;

select l_returnflag, l_linestatus, sum(l_quantity) as sum_qty, sum(l_extendedprice) as sum_base_price,  sum(l_extendedprice * (1 - l_discount)) as sum_disc_price, sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
 avg(l_quantity) as avg_qty, avg(l_extendedprice) as avg_price, avg(l_discount) as avg_disc, count(*) as count_order from Q1_Project_lineitem  group by l_returnflag, l_linestatus order by l_returnflag, l_linestatus;

V2 :Q1_Filter_lineitem

 Create view Q1_Filter_lineitem As select * from lineitem where  l_shipdate <= date '1998-12-01' - interval '1' day ;

select * from Q1_Filter_lineitem  where l_shipdate <= date '1998-12-01' - interval '1' day ;

Merci de me répondre a ma question