How to remove special characters from a string in postgresql?

@orpha 

To remove special characters from a string in PostgreSQL, you can use the regexp_replace function.

Here is an example of how to remove special characters from a string:

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SELECT regexp_replace('Hello, World!#$%^', '[^a-zA-Z0-9 ]', '', 'g');

This query will remove all special characters (non-alphanumeric characters and spaces) from the string 'Hello, World!#$%^' and return 'HelloWorld'.

The ^ in the regular expression pattern [^a-zA-Z0-9 ] means to look for any character that is not alphanumeric or a space.

You can adjust the regular expression pattern to fit your specific needs if you need to remove different special characters.