How can we remove duplicate counts in SQL?

In SQL, you can use COUNT(DISTINCT column_name) to count the number of unique values in a column after removing duplicates. This is explained as follows:

1. The COUNT() function is used to count the number of rows that meet specific criteria.
2. The DISTINCT keyword is used to return unique values, eliminating duplicates.
3. You can perform a distinct count on a column by passing the column name as a parameter to COUNT(DISTINCT column_name).

For example, to count the number of unique values (after deduplication) in the column_name field of a table, you can use the following SQL query:

SELECT COUNT(DISTINCT column_name) FROM table_name;

This will return the unique count of the column_name field.