How to find the size of all tables in SQL Server database

SQL Server gives you everything its stored procedure sp_spaceused. Unfortunately this SP does not support iterating over all tables in a database, so we needed to leverage another (undocumented) Stored Procedure sp_msForEachTable.

SET NOCOUNT ON

DBCC UPDATEUSAGE(0)

-- Find DB size.
EXEC sp_spaceused

-- Create a table to counts row and sizes.
CREATE TABLE #tbl
(
[name] NVARCHAR(128),
[rows] CHAR(11),
reserved VARCHAR(18),
data VARCHAR(18),
index_size VARCHAR(18),
unused VARCHAR(18)
)

INSERT #tbl EXEC sp_msForEachTable 'EXEC sp_spaceused ''?'''

SELECT * FROM #tbl

-- # of rows.
SELECT SUM(CAST([rows] AS int)) AS [rows]
FROM #tbl

DROP TABLE #tbl

After executing this, you will get the size of all tables in your database.