Find Largest Tables in your SQL Server database

Anuj Varma — Thu, 21 Nov 2013 16:57:08 +0000

Introduction

This script uses a temp table to store the results of the query. It sorts the results in descending order – showing the largest tables on top.

CREATE TABLE #FindLargeTables 
(
  table_name    sysname ,
  row_count     INT,
  reserved_size VARCHAR(50),
  data_size     VARCHAR(50),
  index_size    VARCHAR(50),
  unused_size   VARCHAR(50)
)
 
SET NOCOUNT ON
 
INSERT #FindLargeTables
 
EXEC sp_msforeachtable 'sp_spaceused ''?'''
 
SELECT 
  a.table_name,
  a.row_count,
  COUNT(*) AS col_count,
  a.data_size
  FROM #FindLargeTables a
     INNER JOIN information_schema.columns b
     ON a.table_name collate database_default
     = b.table_name collate database_default
       GROUP BY a.table_name, a.row_count, a.data_size
       ORDER BY CAST(REPLACE(a.data_size, ' KB', '') AS integer) DESC
 
DROP TABLE #FindLargeTables

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Find Largest Tables in your SQL Server database

Introduction