Point out the wrong statement :
A. Table constraints must be used when more than one column must be included in a constraint
B. A column constraint is specified as part of a column definition and applies only to that column
C. A table constraint is declared independently from a column definition and can apply to more than one column in a table.
D. Primary keys allow for NULL as one of the unique values
Answer:A
Point out the wrong statement :
A. Table constraints must be used when more than one column must be included in a constraint B. A column constraint is specified as part of a column definition and applies only to that column C. A table constraint is declared independently from a column definition and can apply to more than one column in a table. D. Primary keys allow for NULL as one of the unique values
Explanation:Primary keys also enforce uniqueness, but primary keys do not allow for NULL as one of the unique values.