PostgreSQL – How to Convert String to Date

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You can convert a string to a date using the TO_DATE function in PostgreSQL. This function allows you to specify the input string, the format of the string, and it will return a date accordingly.

The general syntax of the TO_DATE function is as follows:

TO_DATE(input_string, format_string)

Here’s an example of using 

SELECT TO_DATE('2023-08-31', 'YYYY-MM-DD');

In this example, the input string '2023-08-31' is converted to a date using the format 'YYYY-MM-DD'.

Here are some common format specifiers you can use in the format string:

  • YYYY – 4 digit Year
  • MM – Month (01-12)
  • DD – Day of the month (01-31)

You can adjust the format string to match the format of your input string. For example, if your input string is in a different format like ’31-08-2023′, you would use 'DD-MM-YYYY' as the format string.

Using the TO_DATE function requires the format string to match the input string’s format exactly. If the formats don’t match, the function won’t be able to correctly parse the string and will result in an error.

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