MSSQL 查詢資料表大小

SET NOCOUNT ON

--http://msdn.microsoft.com/zh-tw/library/ms188414.aspx
--更新目前資料庫中之所有物件的頁面及 (或) 資料列計數
DBCC UPDATEUSAGE(0)

-- DB size.
EXEC sp_spaceused

-- Table row counts and sizes.
CREATE TABLE #t
(
    [name] NVARCHAR(128),
    [rows] CHAR(11),
    reserved VARCHAR(18),
    data VARCHAR(18),
    index_size VARCHAR(18),
    unused VARCHAR(18)
)

--把每個Table使用的資訊存到#t之中
INSERT #t EXEC sys.sp_MSforeachtable 'EXEC sp_spaceused ''?'''

--依使用空間較大的依序排列並顯示MB
SELECT *, LTRIM(STR(CAST(LEFT(reserved,LEN(reserved)-3) AS NUMERIC(18,0)) / 1024, 18))
AS reservedSize_M
, LTRIM(STR(CAST(LEFT(data,LEN(data)-3) AS NUMERIC(18,0)) / 1024, 18)) + 'MB'
AS dataSize_M
, LTRIM(STR(CAST(LEFT(index_size,LEN(index_size)-3) AS NUMERIC(18,0)) / 1024, 18)) + 'MB'
AS indexSize_M
FROM #t
ORDER BY CAST(LEFT(data,LEN(data)-3) AS NUMERIC(18,0)) DESC

-- 顯示總共筆數及總共使用資訊
SELECT SUM(CAST([rows] AS int)) AS [rows]
, LTRIM(STR(SUM(CAST(LEFT(reserved,LEN(reserved)-3) AS NUMERIC(18,0))) / 1024, 18)) + 'MB'
AS sumOfreservedSize_M
, LTRIM(STR(SUM(CAST(LEFT(data,LEN(data)-3) AS NUMERIC(18,0))) / 1024, 18)) + 'MB'
AS sumOfdataSize_M
, LTRIM(STR(SUM(CAST(LEFT(index_size,LEN(index_size)-3) AS NUMERIC(18,0))) / 1024, 18)) + 'MB'
AS sumOfindexSize_M
FROM #t

DROP TABLE #t