hello Peter,
data_specific_to_device = contains diff values, and is different for different devices
associated_service = will also be a list of values which will be different for different
devices
and same for associated_device column.
this data rarely(almost never) changes and add happens only say twice a month. So can I
not have one big table like below? what disadvantage does it has? sorry I am not into
RDBMS, so i want to know prob specific to my data and proposed table layout. I am also
not clear about relating more than one tables, if i break this up in more than one
table....
thx in advance.
Rajeev
________________________________
From: Peter Brawley <peter.brawley@stripped>
To: Rajeev Prasad <rp.neuli@stripped>; "mysql@stripped"
<mysql@stripped>
Sent: Wednesday, August 15, 2012 4:01 PM
Subject: Re: suggestion needed for table design and relationship
On 2012-08-15 1:54 PM, Rajeev Prasad wrote:
> I have to keep this data in MySql, and i am not sure (as SQL/databse is not my
field) how to organise this into one or many tables? right now I would represent my info
as follows:
>
>
device_name|HW_version|SW_version|IP_addr_pvt|IP_addr_pub|data_specific_to_device|associated_service
|associated_device
> dev_x | 1234 |1234
|1.2.3.4 |9.8.7.6 |data_specific_to_x
|SVC_A,SVC_B,SVC_C... |dev_y,dev_z,dev_n,dev_m...
> dev_y | 2348 |7734
|10.2.3.4 |99.8.7.6 |data_specific_to_y.....|SVC_B,SVC_X...
|dev_x,dev_m...
> dev_z | 3934 |5634
|11.2.3.4 |79.8.7.6 |data_specific_to_z.....|SVC_M
|dev_n,dev_m...
> ...
>
>
> pl advice. what would be the best design? data_specific_to_device could be more than
one column, as i get to explore the data a bit more.
>
> and do i really need a device_id field? whi. ch any SQL table normally has.
Without a primary key, a table isn't really a table. A surrogate
(auto_increment) PK might be simplest.
If the associated_service column is a list of values, it needs to be
projected to a child table (parentkey, data item ...).
From the info posted, I can't tell much about the other fields
PB
-----
>
> ty.
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/mysql
