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.
Lung cancer is the most common cause of clubbing. Clubbing often occurs in heart and lung diseases that reduce the amount of oxygen in the blood. These may include: Heart defects that are present at birth (congenital)