Pregunta de entrevista en Emerson Ecologics: What is the difference between UNION and UNION ALL | Glassdoor

Ir al contenido Ir al pie de página

employer cover photo

Emerson Ecologics

Entrevista para el cargo de Software Developer en Emerson Ecologics

Pregunta de entrevista de Emerson Ecologics

Entrevista para Software Developer

What is the difference between UNION and UNION ALL

Respuestas de entrevistas

Anónimo

23 sep 2019

Union avoid duplicate records AND union all does not check for duplicate records

Anónimo

17 nov 2016

I don't often use unions as I feel they're indicative of bad database design, so I'll be honest and simply say I don't know.

Búsquedas relacionadas: Evaluaciones de Emerson Ecologics | Empleos en Emerson Ecologics | Sueldos en Emerson Ecologics | Prestaciones en Emerson Ecologics

Entrevistas en Emerson Ecologics