Multiple choice technology databases What will be the output of- "Select 1 from dual UNION Select 'A' from dual" 1,A A Error 1 Reveal answer Fill a bubble to check yourself C Correct answer Explanation A UNION query requires that corresponding columns in both select statements have compatible data types. Here, the first SELECT returns a numeric value (1) while the second returns a character value ('A'), resulting in a data type mismatch error.