psql show size of database code example

Example 1: postgres check size table

SELECT pg_size_pretty( pg_total_relation_size('tablename') );

Example 2: how to get the size of the database in postgresql

SELECT pg_size_pretty( pg_database_size('dbname') );

Example 3: find size of all DB's postgres

CopySELECT pg_database.datname as "database_name", pg_database_size(pg_database.datname)/1024/1024 AS size_in_mb FROM pg_database ORDER by size_in_mb DESC;