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How to Change Format Date In Postgresql?

4 minutes read

In PostgreSQL, you can change the format of a date by using the TO_CHAR function. This function allows you to format a date in a specific way by specifying a template that represents the desired format. For example, to change the format of a date to YYYY-MM-DD, you can use the following query:

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SELECT TO_CHAR(your_date_column, 'YYYY-MM-DD') AS formatted_date
FROM your_table_name;


This query will convert the date stored in the your_date_column column of your_table_name to the YYYY-MM-DD format. You can customize the format further by using different placeholders such as MM for month, DD for day, YY for two digit year, and so on.


By using the TO_CHAR function with the appropriate template, you can easily change the format of a date in PostgreSQL to suit your requirements.


How to format dates in PostgreSQL?

In PostgreSQL, dates can be formatted using the to_char() function. Here is an example on how to format a date in PostgreSQL:

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SELECT to_char(current_date, 'YYYY-MM-DD') AS formatted_date;


This will format the current date in the YYYY-MM-DD format. You can replace the format parameter with any other valid date format pattern.


Some commonly used formatting options include:

  • YYYY - 4-digit year
  • MM - month (01-12)
  • DD - day of month (01-31)
  • HH - hour (00-23)
  • MI - minute (00-59)
  • SS - second (00-59)


You can also use other characters such as dashes, slashes, or spaces to separate the date components.


For more possible date and time format patterns, you can refer to the PostgreSQL documentation: https://www.postgresql.org/docs/current/functions-formatting.html.


How to alter date format in PostgreSQL?

To alter the date format in PostgreSQL, you can use the to_char() function to format the date according to your requirements. Here's an example of how you can alter the date format:

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SELECT to_char(your_date_column, 'DD/MM/YYYY') AS new_date_format
FROM your_table_name;


In the to_char() function, the first parameter is the date column you want to format, and the second parameter is the desired format. In this example, 'DD/MM/YYYY' represents the format of day/month/year.


You can use different format patterns in the to_char() function to customize the date format according to your needs. Some common format patterns include:

  • YYYY-MM-DD: Year-month-day
  • MM/DD/YYYY: Month/day/year
  • Mon DD, YYYY: Month day, year


You can refer to the PostgreSQL documentation for more options and formatting patterns for the to_char() function.


How to transform date format in PostgreSQL?

You can transform the date format in PostgreSQL by using the TO_CHAR() function.


Here's an example of how you can transform the date format from 'YYYY-MM-DD' to 'DD/MM/YYYY':

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SELECT TO_CHAR(your_date_column, 'DD/MM/YYYY') AS transformed_date
FROM your_table_name;


You can change the date format pattern in the TO_CHAR() function to suit your needs. You can refer to the PostgreSQL documentation for more information on formatting options: https://www.postgresql.org/docs/current/functions-formatting.html


How to update date format in PostgreSQL?

To update the date format in PostgreSQL, you can use the to_char() function to convert the date to a different format. Here's an example query to update the date format:

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UPDATE table_name
SET date_column = to_char(date_column, 'YYYY-MM-DD')
WHERE condition;


In this example, table_name is the name of the table where the date column is located, date_column is the name of the column containing the date values, and 'YYYY-MM-DD' is the desired date format (you can use any valid date format specifier in PostgreSQL).


Make sure to replace table_name, date_column, and the condition in the WHERE clause with your actual table name, date column name, and conditions for the update.


How to convert date strings to a different format in PostgreSQL?

To convert date strings to a different format in PostgreSQL, you can use the TO_DATE function. Here is an example of how you can convert a date string from one format to another:

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SELECT TO_DATE('2021-12-25', 'YYYY-MM-DD') AS new_date_format;


In this example, the date string '2021-12-25' is converted from the format 'YYYY-MM-DD' to another format specified in the TO_DATE function.


You can also use the TO_CHAR function to convert a date string to a different format. Here is an example:

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SELECT TO_CHAR(TO_DATE('2021-12-25', 'YYYY-MM-DD'), 'Mon DD, YYYY') AS new_date_format;


In this example, the date string '2021-12-25' is converted to the format 'Mon DD, YYYY' using the TO_CHAR function after converting it to a date data type with the TO_DATE function.


How to convert timestamp to date format in PostgreSQL?

In PostgreSQL, you can convert a timestamp to a date format by using the TO_CHAR function. Here is an example query to convert a timestamp to a date format:

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SELECT TO_CHAR(timestamp_column, 'YYYY-MM-DD') AS date_column
FROM your_table;


In this query, timestamp_column is the name of the column storing the timestamp value, and date_column is the alias for the converted date value. The 'YYYY-MM-DD' format specifier represents the desired format for the date. You can change it to any other format you prefer.


You can also use other date format specifiers provided by PostgreSQL. Here are some commonly used format specifiers:

  • YYYY-MM-DD: Year, month, and day
  • MM/DD/YYYY: Month, day, and year
  • DD/MM/YYYY: Day, month, and year


Remember to replace your_table in the query with the actual name of the table you are working with.

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