sql server - SQL choose first of duplicate results -


hello have query returns computer names corresponding ip adress follows: 

select distinct top (100) percent dbo.inv_aex_ac_tcpip.[ip address],                                   dbo.inv_aex_ac_tcpip.[host name] dbo.inv_aex_ac_identification inner join dbo.inv_aex_ac_tcpip     on dbo.inv_aex_ac_identification._resourceguid = dbo.inv_aex_ac_tcpip._resourceguid

this returning results such as: 

computer:               ip:   frank's computer        10.0.0.1 frank's computer        10.0.0.3 nick's computer         10.0.1.0

is possible return first "frank's computer" row, , exclude other one?

thanks!

yes, possible, how depends on dbms of choice. functionality looking group by, puts similar results in same column, need know non-aggregated values, putting them in aggregate function max, min or avg.

your results fine this:

select min(dbo.inv_aex_ac_tcpip.[ip address]) ip, dbo.inv_aex_ac_tcpip.[host name] name dbo.inv_aex_ac_identification inner join dbo.inv_aex_ac_tcpip     on dbo.inv_aex_ac_identification._resourceguid = dbo.inv_aex_ac_tcpip._resourceguid group dbo.inv_aex_ac_tcpip.[host name]

however choice of ip rather arbitrary (min alphabetic sort). in sql server , oracle can define user defined aggregate function better select show, in mysql use group_concat fit needs.


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