Is there a way to remove all non-ASCII string values or those in non-English locales from the database in PostgreSQL?

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Yes, you can remove all non-ASCII string values or those in non-English locales from the database in PostgreSQL using the following steps:

1. First, create a new database backup before performing any deletion operations.

2. Use the following SQL query to identify all rows with non-ASCII characters in a particular column:

SELECT * FROM my_table WHERE my_column ~ '[^[:ascii:]]';

Replace my_table with the name of your table and my_column with the name of the column you want to search.

1. To delete all the rows that have non-ASCII characters in a particular column, use the following SQL query:

DELETE FROM my_table WHERE my_column ~ '[^[:ascii:]]';

Again, replace my_table with the name of your table and my_column with the name of the column you want to delete rows from.

1. In case you want to delete all rows from the table that have non-ASCII characters in any column, you can use the following SQL query:

DELETE FROM my_table WHERE my_table::text ~ '[^[:ascii:]]';

This will convert the entire row to a text value and check for non-ASCII characters before deleting it.

Note: Be careful while deleting rows as this operation is irreversible. It is recommended to create a backup before deleting any data.