to_date function with sysdate

Question

select TO_CHAR(to_date(sysdate, \'DD-MON-YYYY\'), \'DAY\') FROM DUAL; 

When I run this query the output was : SUNDAY. But we know today is Tuesday(

Answer 1

To_date is used to convert a strin to date. As sysdate is already a date, one must not add add to_date.

Answer 2

use this:

 select TO_CHAR(sysdate, 'DAY') FROM DUAL;

you are using this :

 to_date(sysdate, 'DD-MON-YYYY') 

which is giving you date=1/1/0013 which is sunday

Answer 3

Please refer the documentation for sysdate here. Sysdate is already a date data type.

Your example query is inappropriate as to_date function takes first parameter as String not date.

Try the simple query below:

     select TO_CHAR(sysdate, 'DAY') FROM DUAL; 

This should return TUESDAY as output.