PSQL查询当前数据库信息

查询当前数据库的大小和表的数量

SELECT
  current_database() AS "数据库名",
  pg_size_pretty(pg_database_size(current_database())) AS "总容量",
  (
    SELECT
      COUNT(*)
    FROM
      pg_tables
    WHERE
      schemaname NOT IN ('pg_catalog', 'information_schema')
  ) AS "表数量";

结果

image.png

查询当前数据库的大小和格表的大小

SELECT 
    tablename AS "表名",
    pg_size_pretty(pg_total_relation_size(schemaname || '.' || tablename)) AS "总大小",
    pg_size_pretty(pg_relation_size(schemaname || '.' || tablename)) AS "数据大小",
    pg_size_pretty(pg_indexes_size(schemaname || '.' || tablename)) AS "索引大小"
FROM 
    pg_tables
WHERE 
    schemaname NOT IN ('pg_catalog', 'information_schema')
ORDER BY 
    pg_total_relation_size(schemaname || '.' || tablename) DESC;

结果

image.png
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