-- 實現方式1：使用游標

DECLARE@FileName VARCHAR(200),@CurrentTime VARCHAR(50),@DBName VARCHAR(100),@SQL VARCHAR(1000)SET @CurrentTime = CONVERT(CHAR(8),GETDATE(),112) + CAST(DATEPART(hh, GETDATE()) AS VARCHAR) + CAST(DATEPART(mi, GETDATE()) AS VARCHAR)DECLARE CurDBName CURSOR FOR SELECT NAME FROM Master..SysDatabases where dbid>4OPEN CurDBName FETCH NEXT FROM CurDBName INTO @DBName WHILE @@FETCH_STATUS = 0 BEGIN--Execute BackupSET @FileName = 'F:\DBBackup\' + @DBName + '_' + @CurrentTimeSET @SQL = 'BACKUP DATABASE ['+ @DBName +'] TO DISK = ''' + @FileName + '.bak' +''' WITH NOINIT, NOUNLOAD, NAME = N''' + @DBName + '_backup'', NOSKIP, STATS = 10, NOFORMAT'EXEC(@SQL)--Get Next DataBaseFETCH NEXT FROM CurDBName INTO @DBName ENDCLOSE CurDBName DEALLOCATE CurDBName

?實現方式2：使用拼湊SQL的方式

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DECLARE @SQL VARCHAR(MAX)SELECT @SQL = COALESCE(@SQL,'') + ' BACKUP DATABASE '+ QUOTENAME(name,'[]') + ' TO DISK = ''F:\DBBackup\'+ name + '_' + CONVERT(CHAR(8),GETDATE(),112) + CAST(DATEPART(hh, GETDATE()) AS VARCHAR) + CAST(DATEPART(mi, GETDATE()) AS VARCHAR) + '.bak' + ''' WITH NOINIT, NOUNLOAD, NAME = N''' + name + '_backup'', NOSKIP, STATS = 10, NOFORMAT' FROM sys.databases WHERE database_id >4 AND name like '%%' AND state =0PRINT(@SQL) EXECUTE(@SQL)

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??實現方式3：使用系統函數指定備份的數據庫

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USE [master] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER OFF GODELETE FROM [dbo].[sp_MSforeachdb_Filter]create proc [dbo].[sp_MSforeachdb_Filter]@command1 nvarchar(2000), @replacechar nchar(1) = N'?', @command2 nvarchar(2000) = null, @command3 nvarchar(2000) = null,@whereand nvarchar(2000) = null,@precommand nvarchar(2000) = null, @postcommand nvarchar(2000) = null asset deadlock_priority low/* This proc returns one or more rows for each accessible db, with each db defaulting to its own result set *//* @precommand and @postcommand may be used to force a single result set via a temp table. *//* Preprocessor won't replace within quotes so have to use str(). */declare @inaccessible nvarchar(12), @invalidlogin nvarchar(12), @dbinaccessible nvarchar(12)select @inaccessible = ltrim(str(convert(int, 0x03e0), 11))select @invalidlogin = ltrim(str(convert(int, 0x40000000), 11))select @dbinaccessible = N'0x80000000' /* SQLDMODbUserProf_InaccessibleDb; the negative number doesn't work in convert() */if (@precommand is not null)exec(@precommand)declare @origdb nvarchar(128)select @origdb = db_name()/* If it's a single user db and there's an entry for it in sysprocesses who isn't us, we can't use it. *//* Create the select */exec(N'declare hCForEachDatabase cursor global for select name from master.dbo.sysdatabases d ' +N' where (d.status & ' + @inaccessible + N' = 0)' +N' and (DATABASEPROPERTY(d.name, ''issingleuser'') = 0 and (has_dbaccess(d.name) = 1))' + @whereand)declare @retval intselect @retval = @@errorif (@retval = 0)exec @retval = sys.sp_MSforeach_worker @command1, @replacechar, @command2, @command3, 1if (@retval = 0 and @postcommand is not null)exec(@postcommand)declare @tempdb nvarchar(258)SELECT @tempdb = REPLACE(@origdb, N']', N']]')exec (N'use ' + N'[' + @tempdb + N']')return @retval--調用上述過程USE [master] GODECLARE @SQL NVARCHAR(MAX) SELECT @SQL = COALESCE(@SQL,'') + ' BACKUP DATABASE [?] TO DISK = ''F:\DBBackup\?_' + CONVERT(CHAR(8),GETDATE(),112) + CAST(DATEPART(hh, GETDATE()) AS VARCHAR) + CAST(DATEPART(mi, GETDATE()) AS VARCHAR) + '.bak'' WITH NOINIT, NOUNLOAD, NAME = N''?_backup'', NOSKIP, STATS = 10, NOFORMAT'PRINT @SQL--過濾數據庫 EXEC [sp_MSforeachdb_Filter] @command1=@SQL, @whereand=" and [name] not in('tempdb','master','model','msdb') "--查看源碼 EXEC sp_helptext N'sp_MSforeachdb';

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?執行上面的存儲過程就可以備份所有數據庫（系統數據庫除外，想要過濾數據庫可以填寫@whereand參數的條件）

注意：SET QUOTED_IDENTIFIER 這個選項為 OFF

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轉載于:https://www.cnblogs.com/sunliyuan/p/6678453.html

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