Monday, June 2, 2014

How to find the biggest table in MS SQL

If you need to find out the biggest table in MS SQL, you can use below command:

SELECT
    t.NAME AS TableName,
    i.name as indexName,
    sum(p.rows) as RowCounts,
    sum(a.total_pages) as TotalPages,
    sum(a.used_pages) as UsedPages,
    sum(a.data_pages) as DataPages,
    (sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
    (sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,
    (sum(a.data_pages) * 8) / 1024 as DataSpaceMB
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 NOT LIKE 'dt%' AND
    i.OBJECT_ID > 255 AND  
    i.index_id <= 1
GROUP BY
    t.NAME, i.object_id, i.index_id, i.name
ORDER BY
    --object_name(i.object_id) -- sort by id
    --SUM(p.rows) DESC -- sort by number of rows
    SUM(a.total_pages) DESC -- sort by TotalSpaceMB

Thanks for the instruction from marc_s guy here.
Subscribe to RSS Feed Follow me on Twitter!