有没有办法从 SQL 2005 数据库中获取唯一的数据库标识符（例如 GUID）？
我发现这篇文章：http: //msdn.microsoft.com/en-us/library/microsoft.sqlserver.management.smo.database.databaseguid%28v=sql.90%29.aspx
但是，我需要能够从 T-SQL 而不是 VB 获取 DatabaseGuid。
编辑：我正在尝试唯一确定我连接的数据库。通过代码，我在 SQL Compact 和 SQL Server 之间手动同步记录。现在我的用户处于测试环境中，当他们将来指向生产 SQL 时，我需要重新同步整个表，而不是依赖 rowversion。生产服务器上的行版本会有所不同，如果我能够检测到数据库 GUID 更改，我可以重新同步整个表。
提前致谢。
无论 SMO 使用什么方法来获取数据库 guid，您都应该能够做到这一点。如果您在弄清楚 SMO 在做什么时遇到问题，您可以使用分析器来监控 t 执行的内容并找出答案。
在这种情况下，SMO 可能从以下位置读取database_guid值sys.database_recovery_status：
用于将一个数据库的所有数据库文件关联在一起。所有文件的标题页中都必须包含此 GUID，数据库才能按预期启动。只有一个数据库应该有此 GUID，但可以通过复制和附加数据库来创建副本。还原尚不存在的数据库时，RESTORE 始终会生成新的 GUID。
对于正在寻找查询以返回数据库的 GUID 的其他人：
SELECT d.name, drs.database_guid, d.group_database_id
FROM sys.databases d
JOIN sys.database_recovery_status drs
ON d.database_id = drs.database_id
它返回可用性组中此数据库的数据库名称、数据库 GUID 和 GUID。如果数据库不在 AG 中，则最后一个值返回 null。这适用于 SQL Server 2016。
我不知道返回哪个 GUID SMO，但您可以使用
select service_broker_guid from sys.databases
!= Guid.Empty 对于除 master 和 model 之外的所有数据库。
我发现并非所有数据库都有一个 NOT NULL sys.database_recovery_status.database_guid，正如 Remus 所建议的那样。
在 SQL2008 上完成的测试
事实上，我使用分析器发现 database_guid 确实来自 sys.database_recovery_status，这是我捕获的代码：
exec sp_executesql N'SELECT
ISNULL((case dmi.mirroring_redo_queue_type when N''UNLIMITED'' then 0 else dmi.mirroring_redo_queue end),0) AS [MirroringRedoQueueMaxSize],
ISNULL(dmi.mirroring_connection_timeout,0) AS [MirroringTimeout],
ISNULL(dmi.mirroring_partner_name,'''') AS [MirroringPartner],
ISNULL(dmi.mirroring_partner_instance,'''') AS [MirroringPartnerInstance],
ISNULL(dmi.mirroring_role,0) AS [MirroringRole],
ISNULL(dmi.mirroring_safety_level + 1, 0) AS [MirroringSafetyLevel],
ISNULL(dmi.mirroring_state + 1, 0) AS [MirroringStatus],
ISNULL(dmi.mirroring_witness_name,'''') AS [MirroringWitness],
ISNULL(dmi.mirroring_witness_state + 1, 0) AS [MirroringWitnessStatus],
CAST(case when dmi.mirroring_partner_name is null then 0 else 1 end AS bit) AS [IsMirroringEnabled],
ISNULL(dmi.mirroring_guid,''00000000-0000-0000-0000-0000000000000000'') AS [MirroringID],
ISNULL(dmi.mirroring_role_sequence,0) AS [MirroringRoleSequence],
ISNULL(dmi.mirroring_safety_sequence,0) AS [MirroringSafetySequence],
ISNULL(dmi.mirroring_failover_lsn,0) AS [MirroringFailoverLogSequenceNumber],
dtb.is_ansi_null_default_on AS [AnsiNullDefault],
dtb.is_ansi_nulls_on AS [AnsiNullsEnabled],
dtb.is_ansi_padding_on AS [AnsiPaddingEnabled],
dtb.is_ansi_warnings_on AS [AnsiWarningsEnabled],
dtb.is_arithabort_on AS [ArithmeticAbortEnabled],
dtb.is_auto_shrink_on AS [AutoShrink],
dtb.is_cursor_close_on_commit_on AS [CloseCursorsOnCommitEnabled],
dtb.is_concat_null_yields_null_on AS [ConcatenateNullYieldsNull],
dtb.is_numeric_roundabort_on AS [NumericRoundAbortEnabled],
dtb.is_quoted_identifier_on AS [QuotedIdentifiersEnabled],
dtb.is_read_only AS [ReadOnly],
dtb.is_recursive_triggers_on AS [RecursiveTriggersEnabled],
dtb.is_local_cursor_default AS [LocalCursorsDefault],
dtb.page_verify_option AS [PageVerify],
dtb.recovery_model AS [RecoveryModel],
dtb.user_access AS [UserAccess],
dtb.is_db_chaining_on AS [DatabaseOwnershipChaining],
dtb.is_auto_update_stats_async_on AS [AutoUpdateStatisticsAsync],
dtb.is_date_correlation_on AS [DateCorrelationOptimization],
dtb.is_trustworthy_on AS [Trustworthy],
dtb.name AS [Name],
dtb.database_id AS [ID],
dtb.create_date AS [CreateDate],
dtb.is_auto_create_stats_on AS [AutoCreateStatisticsEnabled],
dtb.is_auto_update_stats_on AS [AutoUpdateStatisticsEnabled],
dtb.is_parameterization_forced AS [IsParameterizationForced],
dtb.is_read_committed_snapshot_on AS [IsReadCommittedSnapshotOn],
dtb.is_auto_close_on AS [AutoClose],
dtb.is_broker_enabled AS [BrokerEnabled],
CAST(isnull(dtb.source_database_id, 0) AS bit) AS [IsDatabaseSnapshot],
ISNULL(DB_NAME(dtb.source_database_id), N'''') AS [DatabaseSnapshotBaseName],
dtb.is_fulltext_enabled AS [IsFullTextEnabled],
dtb.service_broker_guid AS [ServiceBrokerGuid],
dtb.snapshot_isolation_state AS [SnapshotIsolationState],
(dtb.is_published*1+dtb.is_subscribed*2+dtb.is_merge_published*4) AS [ReplicationOptions],
ISNULL(suser_sname(dtb.owner_sid),'''') AS [Owner],
ISNULL(dtb.log_reuse_wait,0) AS [LogReuseWaitStatus],
drs.recovery_fork_guid AS [RecoveryForkGuid],
drs.database_guid AS [DatabaseGuid],
CAST((case when drs.last_log_backup_lsn is not null then 1 else 0 end) AS bit) AS [HasFullBackup],
CAST(case when dtb.name in (''master'',''model'',''msdb'',''tempdb'') then 1 else dtb.is_distributor end AS bit) AS [IsSystemObject],
CAST(case when ctb.database_id is null then 0 else 1 end AS bit) AS [ChangeTrackingEnabled],
CAST(ISNULL(ctb.is_auto_cleanup_on,0) AS bit) AS [ChangeTrackingAutoCleanUp],
ISNULL(ctb.retention_period,0) AS [ChangeTrackingRetentionPeriod],
CAST(ISNULL(ctb.retention_period_units,0) AS tinyint) AS [ChangeTrackingRetentionPeriodUnits],
dtb.containment AS [ContainmentType],
dtb.default_language_lcid AS [DefaultLanguageLcid],
dtb.default_language_name AS [DefaultLanguageName],
dtb.default_fulltext_language_lcid AS [DefaultFullTextLanguageLcid],
ISNULL(dtb.default_fulltext_language_name,N'''') AS [DefaultFullTextLanguageName],
CAST(dtb.is_nested_triggers_on AS bit) AS [NestedTriggersEnabled],
CAST(dtb.is_transform_noise_words_on AS bit) AS [TransformNoiseWords],
dtb.two_digit_year_cutoff AS [TwoDigitYearCutoff],
dtb.target_recovery_time_in_seconds AS [TargetRecoveryTime],
case
when dtb.collation_name is null then 0x200
else 0
end |
case
when 1 = dtb.is_in_standby then 0x40
else 0
end |
case dtb.state
when 1 then 0x2
when 2 then 0x8
when 3 then 0x4
when 4 then 0x10
when 5 then 0x100
when 6 then 0x20
else 1
end
AS [Status],
CAST(( case LOWER(convert( nvarchar(128), DATABASEPROPERTYEX(dtb.name, ''Updateability''))) when ''read_write'' then 1 else 0 end) AS bit) AS [IsUpdateable],
CAST(dtb.is_encrypted AS bit) AS [EncryptionEnabled],
CAST(dtb.is_honor_broker_priority_on AS bit) AS [HonorBrokerPriority],
CAST(has_dbaccess(dtb.name) AS bit) AS [IsAccessible],
ISNULL(fsopt.directory_name , N'''') AS [FilestreamDirectoryName],
ISNULL(fsopt.non_transacted_access , 0) AS [FilestreamNonTransactedAccess],
dtb.name AS [DatabaseName2],
dtb.containment AS [ContainmentType2]
FROM
master.sys.databases AS dtb
LEFT OUTER JOIN sys.database_mirroring AS dmi ON dmi.database_id = dtb.database_id
LEFT OUTER JOIN sys.database_recovery_status AS drs ON drs.database_id = dtb.database_id
LEFT OUTER JOIN sys.change_tracking_databases AS ctb ON ctb.database_id = dtb.database_id
LEFT OUTER JOIN sys.database_filestream_options AS fsopt ON fsopt.database_id = dtb.database_id
WHERE
(dtb.name=@_msparam_0)',N'@_msparam_0 nvarchar(4000)',@_msparam_0=N'testdb3'
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