Question

In SQL Server, how can I see the number of disk blocks an index or a tables uses?

Answer 1

Using this query, you can determine the number of pages (8 KB blocks of space) a SQL Server table uses:

SELECT 
    t.NAME AS TableName,
    p.rows AS RowCounts,
    SUM(a.total_pages) AS TotalSpace, 
    SUM(a.used_pages) AS UsedSpace
FROM 
    sys.tables t
INNER JOIN      
    sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN 
    sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN 
    sys.allocation_units a ON p.partition_id = a.container_id
WHERE 
    t.NAME = 'YourTableNameHere'
GROUP BY 
    t.Name, p.Rows
ORDER BY 
    t.Name

This sums up all the data and index pages a table uses.