试试这个-

SELECT 
      d.server_name
    , d.sversion_name
    , d.edition
    , max_db_size_in_gb = 
        CASE WHEN engine_edition = 4 
            THEN 
                CASE 
                    WHEN d.sversion_name LIKE '%2012%' THEN 10
                    WHEN d.sversion_name LIKE '%2008 R2%' THEN 10
                    WHEN d.sversion_name LIKE '%2008%' THEN 4 
                    WHEN d.sversion_name LIKE '%2005%' THEN 4
                END
            ELSE -1 
        END
FROM (
    SELECT 
          sversion_name = SUBSTRING(v.ver, 0, CHARINDEX('-', v.ver) - 1)
        , engine_edition = SERVERPROPERTY('EngineEdition')
        , edition = SERVERPROPERTY('Edition')
        , server_name = SERVERPROPERTY('ServerName')
    FROM (SELECT ver = @@VERSION) v
) d

另外，请尝试使用此查询来获取有关DB的扩展信息-

IF EXISTS(
    SELECT 1 
    FROM tempdb.dbo.sysobjects 
    WHERE id = OBJECT_ID('tempdb.dbo.#DBObj')
) DROP TABLE #DBObj

CREATE TABLE #DBObj
(
      [DB] SYSNAME
    , reservedpages INT
    , usedpages INT
    , pages INT
)

EXEC sys.sp_MSforeachdb '
    USE [?]

    INSERT INTO #DBObj
    (
          [DB]
        , reservedpages
        , usedpages
        , pages
    )
    SELECT 
          DB_NAME()
        , pg.reservedpages
        , pg.usedpages
        , pg.pages   
    FROM (
        SELECT
              reservedpages = SUM(a.total_pages)
            , usedpages = SUM(a.used_pages)
            , pages = SUM(
                CASE
                    WHEN it.internal_type IN (202, 204, 207, 211, 212, 213, 214, 215, 216, 221, 222) THEN 0
                    WHEN a.[type] != 1 AND p.index_id < 2 THEN a.used_pages
                    WHEN p.index_id < 2 THEN a.data_pages ELSE 0
                END
              )
        FROM sys.partitions p
        JOIN sys.allocation_units a ON p.[partition_id] = a.container_id
        LEFT JOIN sys.internal_tables it ON p.[object_id] = it.[object_id]
    ) pg'

SELECT 
      d.name
    , total_size_mb = data.row_size_mb + data.log_size_mb
    , data.log_size_mb
    , data.row_size_mb
    , reserved_space_mb = CAST(do.reservedpages * 8. / 1024 AS DECIMAL(10,2))
    , data_size_mb = CAST(do.pages * 8. / 1024 AS DECIMAL(10,2))
    , index_size_mb = CAST((do.usedpages - do.pages) * 8. / 1024 AS DECIMAL(10,2))
    , unused_size_mb = CAST((do.reservedpages - do.usedpages) * 8. / 1024 AS DECIMAL(10,2))
    , unallocated_space_mb = 
        CAST(CASE WHEN data.row_size >= do.reservedpages 
            THEN (data.row_size - do.reservedpages) * 8. / 1024 
            ELSE 0
        END AS DECIMAL(10,2))
FROM (
    SELECT
          df2.database_id
        , log_size_mb = CAST(df2.log_size * 8. / 1024 AS DECIMAL(10,2))
        , row_size_mb = CAST(df2.row_size * 8. / 1024 AS DECIMAL(10,2)) 
        , df2.log_size
        , df2.row_size
    FROM (
        SELECT 
              df.database_id
            , log_size = SUM(CASE WHEN df.type_desc = 'LOG' THEN df.size END)
            , row_size = SUM(CASE WHEN df.type_desc = 'ROWS' THEN df.size END)
        FROM sys.master_files df
        GROUP BY df.database_id 
    ) df2
) data
JOIN sys.databases d ON data.database_id = d.database_id
JOIN #DBObj do ON do.DB = d.name
ORDER BY data.row_size_mb + data.log_size_mb DESC