Oracle SQL Developer中日期格式的正确语法是什么

Question

Oracle SQL Developer Version 18.2.0.183, Build 183.1748 (READ ONLY ACCESS TO DB FOR QUERIES)

My query is as follows:

SELECT 
DBSTAGE.DATE_FORMAT(DBSTAGE.OAWOM.CHECKINDATE) "Checked In Date MM/DD/YYYY"
FROM 
DBSTAGE.OAWOM
WHERE
DBSTAGE.OAWOM.WOSTATUS = 'CP'

In the CHECKINDATE field portion of My query it returns data in the date format of 15-FEB-19 which is a DD-MM-YY format. I need it to instead be in the format of MM/DD/YYYY. I don't know how to accomplish that, Please help.

Answer 1

In Oracle, you use to_char() to convert the date to a string in the format you want:

select to_char(datecol, 'MM/DD/YYYY')

For specifying literals in a query, I strongly recommend the date keyword with YYYY-MM-DD standard format:

select date '1776-07-04'

You seem to want:

SELECT TO_CHAR(o.CHECKINDATE, 'MM/DD/YYYY') as checkindate_mmddyyyy
FROM DBSTAGE.OAWOM o
WHERE o.WOSTATUS = 'CP';

EDIT:

You may need the function DBSTAGE.DATE_FORMAT() to convert your column to a valid date format:

SELECT TO_CHAR(DBSTAGE.DATE_FORMAT(o.CHECKINDATE), 'MM/DD/YYYY') as checkindate_mmddyyyy
FROM DBSTAGE.OAWOM o
WHERE o.WOSTATUS = 'CP';