I faced a situation where I had to change a column type from Boolean to Integer. And I wanted to rename the column name. For example, we have table that has a boolean column "bDeleted". I have to remane "dDeleted" to "iDeleted" and all boolean values need to convert into 0 and 1. Then you have to run below PostgreSQL queries.

PostgreSQL: to_char Function: The PostgreSQL to_char function converts a number or date to a string.

I just installed PostgreSQL in my local machine, since I am using XAMP. It is easy to integrate into XAMPP. This article helps you to install and integrate PostgreSQL in XAMPP.