> > I have tables like 1) emp_table (personal_no integer (foreign key),
> > cdacno varchar (primary key),name varchar);
>
> > 2) Rank_table (rank_id varchar (primary key), rank_name varchar);
>
> > 3) Rank_date_table (rank_id (foreign key), rank_date date);
>
> > 4) Unit_table (unit_id varchar (primarykey), unit_name varchar);
>
> > 5) Personal_table (per_no varchar (primary key), pername varchar);
>
> > My query is â¦.if I give cdacno I have to get per_no from
> > personal_table.. With this I have to display rank_name from
> > rank_table ,name from emp_table, unit_name from unit_master..
>
> it is not clear what the relationships are between the tables. for
> example what is the foreign key to unit_table?
>
> how does the rank connect to emp_table or personal_table?
yes. in addition to this, it seems that
emp_table references personal_table
on personal_no = per_no.
But it is not clear how this is the case when personal_no is an integer and
per_no is a varchar.
Regards,
Richard Broersma Jr.
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
