SQL服務器I實踐本代碼，但其不執行

Question

declare @databasename nvarchar(50), 
     @timestamp nvarchar(50), 
     @sqlcmd nvarchar(1000) 

set @databasename = (select min(name) 
        from sys.databases 
        where name not in ('master','model','tempdb','msdb')) 

while @databasename is not null 
begin 
    set @timestamp = replace(replace(replace(convert(nvarchar,getdate()),' ','_'),':','_'),'-',' ') 
    set @sqlcmd = 'BACKUP DATABASE '+@databasename+' TO DSIK=' + ' C:\Program Files (x86)\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\'+ @databasename +'_'+@timestamp+'.bkp' 

    exec (@sqlcmd) 

    set @databasename = (select min(name) 
         from sys.databases 
         where name not in ('master','model','msdb','tempdb') 
          and name > @databasename) 
end; 
go 

Answer 1

（1）TO DSIK應TO DISK

（2）C:\Prog...部分應該在單引號包圍。所以，你最好使用三個撇號在path + filename開頭和結尾'''C:\Prog...' + ... + ... + '.bkp'''。

（3）查詢，正確解析，應該像（不要忘了用正確的路徑替換C:\Prog...部分）：

declare 
@databasename nvarchar(50), 
@timestamp nvarchar(50), 
@sqlcmd nvarchar(1000) 
; 
set @databasename= 
(select min(name) from sys.databases 
where name not in ('master','model','tempdb','msdb')) 
; 
while @databasename is not null 
begin 
set @timestamp= replace(replace(replace(convert(nvarchar,getdate()),' ','_'),':','_'),'-',' '); 
set @sqlcmd ='BACKUP DATABASE '+@databasename+' TO DISK=' + '''C:\Prog...' + @databasename +'_'+@timestamp+'.bkp'''; 
exec (@sqlcmd); 
set @databasename=(select min(name) from sys.databases where name not in ('master','model','msdb','tempdb')and name > @databasename); 
end 
; 

（4）這是一個很好的做法，以結束每（完整命令）「;」。