sql查询数据库中所有表的记录条数，以及占用磁盘空间大小。

SELECT
TableName = obj.name,
TotalRows = prt.rows,
[SpaceUsed(KB)] = SUM(alloc.used_pages)*8
FROM sys.objects obj
JOIN sys.indexes idx on obj.object_id = idx.object_id
JOIN sys.partitions prt on obj.object_id = prt.object_id
JOIN sys.allocation_units alloc on alloc.container_id = prt.partition_id
WHERE
obj.type = 'U' AND idx.index_id IN (0, 1)
GROUP BY obj.name, prt.rows
ORDER BY SUM(alloc.used_pages)*8 DESC

SELECT 
    t.NAME AS '表名称',
    s.Name AS '架构',
    p.rows AS '数据条数',
    SUM(a.total_pages) * 8 AS '总分配空间KB', 
    CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS '总分配空间MB',
    SUM(a.used_pages) * 8 AS '数据使用空间KB', 
    CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS '数据使用空间MB', 
    (SUM(a.total_pages) - SUM(a.used_pages)) * 8 AS '未使用空间KB',
    CAST(ROUND(((SUM(a.total_pages) - SUM(a.used_pages)) * 8) / 1024.00, 2) AS NUMERIC(36, 2)) AS '未使用空间MB'
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 > 255 
GROUP BY 
    t.Name, s.Name, p.Rows
ORDER BY 
    t.Name

转自这里：

https://blog.csdn.net/yuxuac/article/details/79204910

--统计表占用空间大小MB
select tableName,SUM([UseSize(MB)]) as [UseSize(MB)] from (
SELECT 
    t.NAME AS 'tableName'
    ,p.rows AS 'rows',
    CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS 'UseSize(MB)'
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 t.is_ms_shipped = 0 AND i.OBJECT_ID > 255 
    AND t.name = 'b_zbsj' -- 表名称
GROUP BY t.Name, p.Rows)
tempTable 
group by tableName