How can you determine the total number of records in a PostgreSQL database table?

To determine the total number of records in a PostgreSQL table, an SQL query with the aggregate function COUNT is used:

SELECT COUNT(*) FROM table_name;

This query returns the number of rows in the specified table.

If you are using Python, for example with the psycopg2 library, you can execute the query like this:

import psycopg2

conn = psycopg2.connect(dbname='your_db', user='user', password='pass', host='localhost')
cur = conn.cursor()
cur.execute('SELECT COUNT(*) FROM table_name;')
count = cur.fetchone()[0]
print(f'Total records: {count}')
cur.close()
conn.close()

This is a simple and effective way to get the number of records in a table.