有时候数据库太大，需要压缩使用

首先查询出，每个表占用的磁盘空间。

https://stackoverflow.com/questions/7892334/get-size-of-all-tables-in-database

In Management Studio 2012 you can do: View-Object Explorer Details (F7) and navigate to "Tables" in Object Explorer. In Details right-click on the header and select size columns.

或者

SELECT 
    t.NAME AS TableName,
    s.Name AS SchemaName,
    p.rows,
    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, t.Name

然后压缩某个表。

https://docs.microsoft.com/en-us/sql/relational-databases/data-compression/data-compression?view=sql-server-ver15

USE [EYDAYYLS22]
ALTER TABLE [dbo].[t_pc_branch_price] REBUILD PARTITION = ALL
WITH 
(DATA_COMPRESSION = ROW
)

最后收缩数据库

https://docs.microsoft.com/en-us/sql/relational-databases/databases/shrink-a-database?view=sql-server-ver15

DBCC SHRINKDATABASE (UserDB, 10);
GO

来源：oschina

链接：https://my.oschina.net/ethanleellj/blog/4300978

标签

rebuild