Which of the following is not a restriction for a table to be a relation?
A. The cells of the table must contain a single value
B. All of the entries in any column must be of the same kind
C. The columns must be ordered
D. No two rows in a table may be identical
Answer:A
Which of the following is not a restriction for a table to be a relation?
A. The cells of the table must contain a single value B. All of the entries in any column must be of the same kind C. The columns must be ordered D. No two rows in a table may be identical
Explanation: To format the columns differently, assign a unique alias to each column within the SELECT command itself (do not use the ALIAS clause of the COLUMN command) and enter a COLUMN command for each column’s alias.