删除库中所有表中的数据

declare @TableName nvarchar(250)
--声明读取数据库所有数据表名称游标mycursor1
declare mycursor1 cursor for select name from dbo.SysObjects WHERE OBJECTPROPERTY(ID, 'IsUserTable') = 1
open mycursor1 
--从游标里取出数据赋值到我们刚才声明的数据表名变量中
fetch next from mycursor1 into @TableName 
--如果游标执行成功  
while (@@fetch_status=0)
begin 
--执行删除
--exec('truncate table ['+@TableName+']')
exec('delete from ['+@TableName+']')
 --用游标去取下一条记录
 fetch next from mycursor1 into @TableName
end 
--关闭游标
close mycursor1
print '游标1关闭' 
--撤销游标
deallocate mycursor1
print '撤销游1'