Group by clause - Postgres 9.2.4

I need some help

I was given the SQL called as insert into usr_role (select usr_id,
'501~734' from usr_role where role_id = '501~703' group by usr_id); to be
run in a server which will work fine but I need to construct another one to
work the same way for the master table called corp_usr_role. Given the
following 2 tables, is it correct to have the SQL as insert into
corp_usr_role (select usr_id,ctry_cde,grp_cde, '501~734' from
corp_usr_role where role_id = '501~703' group by
usr_id,ctry_cde,grp_cde,role_id);

*First table :*

*Table "public.corp_usr_role"*

Column | Type | Modifiers

----------+------+-----------

ctry_cde | text | not null

grp_cde | text | not null

usr_id | text | not null

role_id | text | not null

Indexes:

"pk_cur" PRIMARY KEY, btree (ctry_cde, grp_cde, usr_id, role_id)

*2nd table : *

*Table "public.usr_role"*

Column | Type | Modifiers

---------+------+-----------

usr_id | text |

role_id | text |

Indexes:

"idx_usr_role_role" btree (role_id)

"idx_usr_role_usr" btree (usr_id)

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