如何在PostgreSQL中更改日期样式

Question

I know this has been asked many times but no matter what I try in PostgreSQL 9.4, the datestyle will revert to ISO,MDY within a minute or so. I require the date format:

SET datestyle to SQL,DMY;
Show datesyle;

Eg dd/mm/yyyy ... - After entering this, the 'show' command displays SQL,DMY

SELECT NOW();

Displays the current date in correct format

Each time I apply this setting and look at my date column it still turns my input into yyyy-mm-dd. Then shortly after if i run:

Show datestyle;

It's back to ISO,MDY.

I have applied the datestyles in three other ways:

ALTER DATABASE "database" SET datestyle TO SQL,DMY;

ALTER USER "User" SET datestyle to SQL,DMY;

• postgresql.config - Changed the datestyle variable and restarted the server

I have spent hours looking up advice and tried editing LC_TIME and the results are the same.

Answer 1

I suspect the answer is here: http://www.postgresql.org/docs/current/static/sql-set.html

To quote " SET only affects the value used by the current session. "

But I'm wondering why you are trying to force a default date style. Just use YYYY-MM-DD in all your interactions. It's the ISO standard! When the value is supplied externally, convert it with to_date() and to output format it with to_char() .

Answer 2

What worked for me was to modify the "datestyle" attribute in postgresql.conf. In my case it's located in /etc/postgresql/9.5/main/postgresql.conf

Good luck!