Unir dos columnas en una tabla en SQL

Question

Tengo un problema que es bastante simple de entender, pero para mí no es tan simple de implementar.

tengo una tabla llamada Tiempo:

----------------------------------- 
DAY  TIME1  TIME2 
----------------------------------- 
1  08.00  09.40 
1  09.40  10.00 
1  10.00  11.40 
2  08.00  08.50 
2  08.50  10.40 
---------------------------------- 

Lo que quiero conseguir es como:

------------------- 
DAY  TIME  
------------------- 
1  08.00  
1  09.40  
1  10.00  
1  11.00  
2  08.00  
2  08.50  
2  10.40  
------------------ 

He probado este código:

SELECT DISTINCT sub.val FROM (
    SELECT Time1 AS val FROM Time 
    UNION ALL 
    SELECT Time2 AS val FROM Time 
) AS sub 

Y solo devuelve la columna Hora. No tengo idea de unirme a la columna "Día". Mientras intento agregar el "Día" después del "SUB.valor DISTINCT", aparece el error. ¿Cómo hacerlo?

Muchas gracias.

Answer 1

select distinct day, time1 from mytab 
union 
select distinct day, time2 from mytab 

Answer 2

SELECT DISTINCT sub.Day, sub.val as Time FROM (
    SELECT Day, Time1 AS val FROM Time 
    UNION ALL 
    SELECT Day, Time2 AS val FROM Time 
) AS sub 

Answer 3

probar esto

SELECT DISTINCT * 
FROM (
    SELECT day, time1 FROM Time 
    UNION ALL SELECT day, time2 FROM Time 
) AS x 
ORDER BY x.day 

Answer 4

Esto podría ayudar:

SELECT 
    DAY, 
    TIME1 
FROM 
    YourTable AS T 
UNION 
SELECT 
    DAY, 
    TIME2 
FROM 
    YourTable AS T 
ORDER BY DAY,TIME1