In order for two queries to be UNION-compatible, they must:
A) both have the same number of lines in their SQL statements.
B) both output compatible data types for each column and return the same number of rows.
C) both return at least one row.
D) both return exactly one row.

Question

Quizplus · Accepted Answer

For two queries to be UNION-compatible, they must have the same number of columns with compatible data types in each corresponding column. The number of rows returned does not need to be the same.

In Order for Two Queries to Be UNION-Compatible, They Must