sql 的PostgreSQLでレコード数とサイズ（物理容量）を调べる

Posted 2021-05-14

SELECT
  T2.relname,  
  cast (T2.reltuples as int) as rows,
  (relpages * 8192) as bytes 
 FROM pg_stat_user_tables AS T1 INNER JOIN pg_class AS T2 ON T1.relname = T2.relname 
 ORDER BY T2.relname;