How to convert column type from varchar to date in PostgreSQL?

Question

I have varchar data type column and date data type column.

I have to update varchar column data into date column

Answer 1

syntax for typecasting:

alter table table_name alter column_name 
   type converting_data_type using(column_name::converting_data_type)

converting from varchar to date

alter table table_name 
  alter column_name type date using(column_name::date)