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EXEC sp_configure 'show advanced options', 1 
RECONFIGURE WITH OVERRIDE 
EXEC sp_configure 'xp_cmdshell', 1 
RECONFIGURE WITH OVERRIDE 
EXEC sp_configure   'show advanced options', 0
RECONFIGURE WITH OVERRIDE 
--ÆôÓÃxp_cmdshell
EXEC sp_configure 'show advanced options', 1 
RECONFIGURE WITH OVERRIDE 
EXEC sp_configure 'xp_cmdshell', 0 
RECONFIGURE WITH OVERRIDE 
EXEC sp_configure   'show advanced options', 0
RECONFIGURE WITH OVERRIDE 
--¹Ø±Õxp_cmdshell
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backup   database   dbname     to     disk= 'd:\backdbname.bak '   with   init,password= ''
exec   xp_cmdshell   'net   use   z:   \\192.168.36.38\document   " "   /user:des-dev3\rfq '
exec   xp_cmdshell   'copy   d:\backdbname.bak   z:\'
exec   xp_cmdshell   'net   use   z:   /delete '
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exec('select * from tableName')
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set @fname = 'FiledName'
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COLLATE { <collation_name> | database_default }
<collation_name> :: =
     { Windows_collation_name } | { SQL_collation_name }
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collation_name
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