Identify Total Row Count for Databases

Learn how to identify your total row count for different databases in order to help estimate your MAR. You can roughly estimate your MAR by taking 10-20% of the total rows in your database, though your actual MAR will vary depending on the specifics of your database use case.

Sample scripts

Use the sample scripts for your database type to find your database's total row count.

Oracle

Run the following command to find row counts for all tables in a schema:

exec dbms_stats.gather_schema_stats('SCHEMANAME')

select table_name, num_rows
  from user_tables;

SQL Server

Run the following command to find row counts for all tables in a SQL Server database:

SELECT
      QUOTENAME(SCHEMA_NAME(sOBJ.schema_id)) + '.' + QUOTENAME(sOBJ.name) AS [TableName]
      , SUM(sPTN.Rows) AS [RowCount]
FROM
      sys.objects AS sOBJ
      INNER JOIN sys.partitions AS sPTN
            ON sOBJ.object_id = sPTN.object_id
WHERE
      sOBJ.type = 'U'
      AND sOBJ.is_ms_shipped = 0x0
      AND index_id < 2 -- 0:Heap, 1:Clustered
GROUP BY
      sOBJ.schema_id
      , sOBJ.name
ORDER BY [TableName]
GO

PostgreSQL

Run the following command to find row counts for all tables in a single schema:

SELECT schemaname,relname,n_live_tup
  FROM pg_stat_user_tables
  WHERE schemaname = 'PUBLIC'
  ORDER BY n_live_tup DESC;

Or run the following command to find row counts for all tables in all schemas:

SELECT schemaname,relname,n_live_tup
  FROM pg_stat_user_tables
  ORDER BY n_live_tup DESC;

MySQL

Run the following command to find row counts for all tables in a MySQL database:

SELECT
    TABLE_NAME,
    TABLE_ROWS
FROM
    `information_schema`.`tables`
WHERE
    `table_schema` = 'YOUR_DB_NAME';