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How to write script to Get table and index sizes in PostgreSQL ?

    pg_size_pretty(table_size) AS table_size,
    pg_size_pretty(indexes_size) AS indexes_size,
    pg_size_pretty(total_size) AS total_size
        pg_table_size(table_name) AS table_size,
        pg_indexes_size(table_name) AS indexes_size,
        pg_total_relation_size(table_name) AS total_size
    FROM (
        SELECT table_name AS table_name
        FROM information_schema.tables
        WHERE table_schema = 'public'
    ) AS all_tables
    ORDER BY total_size DESC, table_name
) AS pretty_sizes

if you want to get the data from all schemas, delete WHERE table_schema = 'public'


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