DBI202Xuất hiện trong 1 đề thi
Which of the following is true about A UNION query?
Các lựa chọn
ACombines the output from multiple queries and must include the same number of columns and data types.
BCombines the output from no more than two queries and must include the same number of columns and data types.
CCombines the output from no more than two queries and does not include the same number of columns and data types.
DCombines the output from multiple queries and does not include the same number of columns and data types.