[转]sqlserver查询系统表统计表行数和占用空间

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

1.查询表行数

SELECT object_name (i.id) TableName, 
       rows as RowCnt 
FROM sysindexes i 
INNER JOIN sysObjects o 
    ON (o.id = i.id AND o.xType = 'U ') 
WHERE indid < 2   
and object_name (i.id)='IOData' --去掉此条件查询当前数据库的所有表信息

更快的方法如下:

select sum (spart.rows) as Count

from sys.partitions spart

where spart.object_id = object_id('tableName')

and spart.index_id < 2

https://itknowledgeexchange.techtarget.com/sql-server/why-is-my-select-count-running-so-slow/

2.查询占用空间等信息

SELECT 
    t.NAME AS TableName,
    s.Name AS SchemaName,
    p.rows AS RowCounts,
    SUM(a.total_pages) * 8 AS TotalSpaceKB, 
    CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
    SUM(a.used_pages) * 8 AS UsedSpaceKB, 
    CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB, 
    (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 > 255 
    AND t.Name='IOData'  --去掉此条件 查询当前数据库的所有表信息
GROUP BY 
    t.Name, s.Name, p.Rows
ORDER BY 
    t.Name