Explanation: An unqualified column name is. ambiguous if more than one table or view identified in. the FROM clause has a column with that name, or if. more than one column of a nested table expression has. that name.
The exact cause of clubfoot is unknown, but doctors agree that a family history of clubfoot increases the likelihood that a child will be born with the condition. In addition, mothers who smoke and drink during pregnancy are more likely to give birth to a child with a clubfoot or clubfeet.
Clubfoot (congenital talipes equinovarus) is a deformity that is present at birth in about one in every 1,000 children. It occurs in males more often than females and can affect one or both feet. The feet of an infant with clubfoot point down and inward.