Domanda di colloquio di Infosys
What is the difference between UNION and UNION ALL?
Risposta di colloquio
Anonimo
7 mag 2018
While UNION doesn't select duplicate rows, UNION ALL selects duplicate rows too.
What is the difference between UNION and UNION ALL?
Anonimo
While UNION doesn't select duplicate rows, UNION ALL selects duplicate rows too.