查看MS SQL SERVER数据库中表的大小

前段时间IT反馈数据库备份很慢，原因是我们的数据库太大了，需要删除一些历史数据，因此需要查一下，哪些表太大，需要删除，因此在网上找到这句SQL，很好用。

SELECT
db_name() as DbName,
t.NAME AS TableName,
s.Name AS SchemaName,
format(p.rows ,'N0') AS RowCounts,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00 / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceGB,
SUM(a.used_pages) * 8 AS UsedSpaceKB,
CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00 / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceGB,
(SUM(a.total_pages) - SUM(a.used_pages)) * 8 AS UnusedSpaceKB,
CAST(ROUND(((SUM(a.total_pages) - SUM(a.used_pages)) * 8) / 1024.00, 2) AS NUMERIC(36, 2)) AS UnusedSpaceMB
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
LEFT OUTER JOIN
sys.schemas s ON t.schema_id = s.schema_id
WHERE
t.NAME NOT LIKE 'dt%'
AND t.is_ms_shipped = 0
AND i.OBJECT_ID > 0
GROUP BY
t.Name, s.Name, p.Rows
ORDER BY
TotalSpaceGB desc