How to get the week day name from a date?

问题

Given 03/09/1982 how can we say it is which week day. In this case it will be Tue.

Is it possible to get in a single query?

回答1:

SQL> SELECT TO_CHAR(date '1982-03-09', 'DAY') day FROM dual;

DAY
---------
TUESDAY

SQL> SELECT TO_CHAR(date '1982-03-09', 'DY') day FROM dual;

DAY
---
TUE

SQL> SELECT TO_CHAR(date '1982-03-09', 'Dy') day FROM dual;

DAY
---
Tue

(Note that the queries use ANSI date literals, which follow the ISO-8601 date standard and avoid date format ambiguity.)

回答2:

Sorry for a too late answer. but someone might come to this post and see this .

Use

You can use other options in 2nd parameter as it has a lot of variety.

来源：https://stackoverflow.com/questions/8004645/how-to-get-the-week-day-name-from-a-date