sql SQL片段

Posted 2021-05-13

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

Select object_schema_name(UStat.object_id) 
        + '.' + object_name(UStat.object_id) As [Object Name] 
    ,Case
        When Sum(User_Updates + User_Seeks + User_Scans + User_Lookups) = 0 Then Null
        Else Cast(Sum(User_Seeks + User_Scans + User_Lookups) As Decimal)
                    / Cast(Sum(User_Updates 
                                + User_Seeks 
                                + User_Scans
                                + User_Lookups) As Decimal(19,2))
        End As [Proportion of Reads] 
    , Case
        When Sum(User_Updates + User_Seeks + User_Scans + User_Lookups) = 0 Then Null
        Else Cast(Sum(User_Updates) As Decimal)
                / Cast(Sum(User_Updates 
                            + User_Seeks 
                            + User_Scans
                            + User_Lookups) As Decimal(19,2))
        End As [Proportion Of Writes] 
    , Sum(User_Seeks + User_Scans + User_Lookups) As [Total Read Ops] 
    , Sum(User_Updates) As [Total Write Ops]
From sys.dm_db_Index_Usage_Stats As UStat
    Join Sys.Indexes As I 
        On UStat.object_id = I.object_id
            And UStat.index_Id = I.index_Id
    Join sys.tables As T
        On T.object_id = UStat.object_id
Where I.Type_Desc In ( 'Clustered', 'Heap' )
Group By UStat.object_id
Order By object_schema_name(UStat.object_id) 
        + '.' + object_name(UStat.object_id)

ALTER DATABASE MYDB SET RECOVERY SIMPLE
GO

USE MYDB
GO

DBCC SHRINKFILE ('MYDB_LOG', 1)
GO

DBCC SHRINKFILE ('MYDB', 1)
GO