Sql server 查询数据库中表的使用空间以及表结构

一 . Sql server 查询数据库中表的使用空间

1.查询单表

EXEC sp_spaceused \'dbo.tablename\'

2. 查询所有表

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  p.rows>80000

GROUP BY
t.Name, s.Name, p.Rows
ORDER BY
t.Name

 二 .查询表结构

SELECT  CASE WHEN col.colorder = 1 THEN obj.name
                  ELSE \'\'
             END AS 表名,
        col.colorder AS 序号 ,
        col.name AS 列名 ,
        ISNULL(ep.[value], \'\') AS 列说明 ,
        t.name AS 数据类型 ,
        col.length AS 长度 ,
        ISNULL(COLUMNPROPERTY(col.id, col.name, \'Scale\'), 0) AS 小数位数 ,
        CASE WHEN COLUMNPROPERTY(col.id, col.name, \'IsIdentity\') = 1 THEN \'√\'
             ELSE \'\'
        END AS 标识 ,
        CASE WHEN EXISTS ( SELECT   1
                           FROM     dbo.sysindexes si
                                    INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id
                                                              AND si.indid = sik.indid
                                    INNER JOIN dbo.syscolumns sc ON sc.id = sik.id
                                                              AND sc.colid = sik.colid
                                    INNER JOIN dbo.sysobjects so ON so.name = si.name
                                                              AND so.xtype = \'PK\'
                           WHERE    sc.id = col.id
                                    AND sc.colid = col.colid ) THEN \'√\'
             ELSE \'\'
        END AS 主键 ,
        CASE WHEN col.isnullable = 1 THEN \'√\'
             ELSE \'\'
        END AS 允许空 ,
        ISNULL(comm.text, \'\') AS 默认值
FROM    dbo.syscolumns col
        LEFT  JOIN dbo.systypes t ON col.xtype = t.xusertype
        inner JOIN dbo.sysobjects obj ON col.id = obj.id
                                         AND obj.xtype = \'U\'
                                         AND obj.status >= 0
        LEFT  JOIN dbo.syscomments comm ON col.cdefault = comm.id
        LEFT  JOIN sys.extended_properties ep ON col.id = ep.major_id
                                                      AND col.colid = ep.minor_id
                                                      AND ep.name = \'MS_Description\'
        LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
                                                         AND epTwo.minor_id = 0
                                                         AND epTwo.name = \'MS_Description\'
WHERE   obj.name = \'T_Contract\'--数据库表名  

ORDER BY col.colorder ;