The Postgres Query select date('22-02-2022')
is showing Error message.
I need to save date in a column of a table, but the input date can be any format. Please suggest how to save date in YYYY-MM-DD format.
Following is the Error screenshot:
A date has no format at all. But if you specify a date literal (constant) the way you tried, it has to be in yyyy-mm-dd format:
select date '2022-02-22'
If you want to specify the value in a different format, use the to_date() function:
select to_date('22-02-2022', 'dd-mm-yyyyy');
If the column in the table is defined with the date data type, the way you specify the actually value is irrelevant as it will be stored as a binary value without any format.
If you need a specific format when selecting (displaying) those values, you can use the to_char() function.
If all your dates and timestamps are going to come in this way then as the HINT suggests you need to change the DateStyle.
Run SHOW DateStyle, I'm guessing it will return something like ISO, MDY.
Change it SET DateStyle = 'ISO, DMY', then your example will work.
Example:
show datestyle ;
DateStyle
-----------
ISO, MDY
select date('22-02-2022');
ERROR: date/time field value out of range: "22-02-2022"
LINE 1: select date('22-02-2022');
^
HINT: Perhaps you need a different "datestyle" setting.
set datestyle = 'ISO,DMY';
select date '22-02-2022';
date
------------
2022-02-22
Related
I have table ABC in which I have column Z of datatype Date. The format of the data is YYYYMMDD. Now I am looking to convert the above format to YYYY-MON-DD format. Can someone help?
You can use to_char
TO_CHAR(Z,'YYYY-MON-DD')
Depending on what the purpose of the reformatting is, you can either explicitly cast it to a VARCHAR/CHAR and define the format, or you can change your display format to however you'd like to see all dates:
ALTER SESSION SET DATE_OUTPUT_FORMAT = 'YYYY-MON-DD';
It's important to understand that if the data is in a DATE field, then it is stored as a date, and the format of the date is dependent on your viewing preferences, not how it is stored.
Since the value of the date field is stored as a number, you have to convert it to date.
ALTER SESSION SET DATE_OUTPUT_FORMAT = 'YYYY-MON-DD';
select to_date(to_char( z ), 'YYYYMMDD');
(adding this answer to summarize and resolve the question - since the clues and answers are scattered through comments)
The question stated that column Z is of type DATE, but it really seems to be a NUMBER.
Then before parsing a number like 20201017 to a date, first you need to transform it to a STRING.
Once the original number is parsed to a date, it can be represented as a new string formatted as desired.
WITH data AS (
SELECT 20201017 AS z
)
SELECT TO_CHAR(TO_DATE(TO_CHAR(z), 'YYYYMMDD'), 'YYYY-MON-DD')
FROM data;
# 2020-Oct-17
I'm trying to add only the current date in "DD/MM/YYYY" format in a field of type ' timestamp in PostgreSQL' .
I try:
select to_char(now(),'DD/MM/YYYY') as date;
But PostgreSQL return me:
TIP : You will need to rewrite the expression or apply a type conversion.
There is no such thing as "only the date" in a timestamp field. A timestamp field will store timestamps.
Try using the date type instead. Please read about this here.
Also, please consider using the ISO 8601 format instead. Getting used to it helps in a lot of cases.
Human-readable formats like "DD/MM/YYYY" should only be used for presentation.
If you want to use timestamp fields and insert a human-readable formatted dates, then you are looking for:
to_timestamp('05/04/2016', 'DD/MM/YYYY')
If it is about the current date, then Postgres provides the CURRENT_DATE function, which you may use:
SELECT CURRENT_DATE;
INSERT INTO t (timestamp_field) VALUES (CURRENT_DATE);
I need to change the date format from yyyy-mm-dd to dd/mm/yyyy, but I need to keep the date type for the column. So far, I have used this method that changes the format correctly but transforms the column type from date to text.
TO_CHAR(mydate::TIMESTAMP WITH TIME ZONE, 'dd/mm/yyyy'::TEXT) ;
How can I do it with keeping the date type?
This is a misunderstanding.
If your data type is date, then it is stored without format. It's just a 4-byte integer counting seconds since 2000.
You can format it any way when displaying to the client.
SELECT to_char(mydate, 'yyyy-mm-dd') AS one_way
,to_char(mydate, 'dd/mm/yyyy') AS other_way
'yyyy-mm-dd' happens to be ISO 8601 format, which is the default text representation in many locales.
You can always create a VIEW with a text representation of the date:
CREATE VIEW v_tbl_with_date_foramt AS
SELECT id, some_column, to_char(mydate, 'dd/mm/yyyy') AS mydate_text
FROM tbl;
But now it's a text column, not a date column.
datestyle is responsible for how input date literals are interpreted.
LC_TIME regulates how date/time functions behave.
Formatting Date(YY:MM:DD:Time) in Excel
The default display is the ISO 8601: 'yyyy-mm-dd'.
In postgres I have a table with date column. Now postgres allows me to write date in Y-m-d format. But I need date in d/m/Y format. How to change it?
When I do:
show datestyle;
I get:
"ISO, DMY"
And input date in table in this format 13/02/2009
But when I close and open table again I see this 2009-02-13. JDBC gives me date in this format too. What am I doing wrong?
you also can use the command
set datestyle to [your new datestyle];
in the console of postgreSQL.
yyyy-mm-dd is the recommended format for date field, its the ISO 8601 format.
You can change the format in the postgresql.conf file.
The document states
The date/time styles can be selected by the user using the SET
datestyle command, the DateStyle parameter in the postgresql.conf
configuration file, or the PGDATESTYLE environment variable on the
server or client. The formatting function to_char is
also available as a more flexible way to format date/time output.
Hope this helps!
Use the to_char function with your date as follows:
select to_char(date_column1, 'Mon/DD/YYYY');
If at all possible, don't use DATESTYLE. It'll affect all code in your session, including things like stored procedures that might not be expecting it and might not have set an explicit overriding DATESTYLE in their definitions.
If you can, use to_char for date output, and to_timestamp for date input whenever you need to use any date formats that might be ambiguous, like D/M/Y. Use ISO dates the rest of the time.
I'm getting the following error message
ERROR: date/time field value out of range: "13/01/2010"
HINT: Perhaps you need a different "datestyle" setting.
I want to get my date in the format DD/MM/YYYY
SHOW datestyle;
DateStyle
-----------
ISO, MDY
(1 row)
INSERT INTO container VALUES ('13/01/2010');
ERROR: date/time field value out of range: "13/01/2010"
HINT: Perhaps you need a different "datestyle" setting.
SET datestyle = "ISO, DMY";
SET
INSERT INTO container VALUES ('13/01/2010');
INSERT 0 1
SET datestyle = default;
SET
http://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-DATESTYLE
DateStyle - Sets the display format
for date and time values, as well as
the rules for interpreting ambiguous
date input values.
For historical reasons, this variable
contains two independent components:
the output format specification (ISO,
Postgres, SQL, or German) and the
input/output specification for
year/month/day ordering (DMY, MDY, or
YMD).
Of course it's best to use unambiguous input format (ISO 8601), but there is no problem to adjust it as you need.
You could set the date style to European dd/mm/yyyy:
SET DateStyle TO European;
I'd advise against this though. I generally try to convert between formats, and keep ISO formatted dates in the data source. After all, it's only a matter of representation, not a matter of different data.
Edit:
When using this COPY, the valid input format is defined by the server configuration and can either be changed for the current session using the SET command as described by Berry or by adjusting the server configuration.
DateStyle description in the manual:
http://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-DATESTYLE
The following is not valid for the real situation, but I'm keeping it for reference anyway
When using date (or timestamp) literals always specify a format mask to convert them. Otherwise your statements aren't portable and won't necessarily run on every installation.
The ANSI SQL standard for date literals is like this:
UPDATE some_table
SET date_column = DATE '2011-05-25'
WHERE pk_column = 42;
If you cannot change the literal format, you need to apply the to_date() function
UPDATE some_table
SET date_column = to_date('13/01/2010', 'dd/mm/yyyy')
WHERE pk_column = 42;
If this is not what you are doing you should show us the full SQL statement that generated the error.