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.
Pregnancy and Hormonal Changes. Foot cramps can occur more frequently in the second and third trimester of pregnancy. They may be the result of hormonal changes or an increase in retained water, which causes edema in the feet and ankles and decreased circulation.