Variables in PLSQL - oracle

Question

I want to get the value defined in my Procedure as mentioned below.
declare
city varchar2(50) := 'XYZ';
TYPE table_type is table of table_name%rowtype;
var table_type;
begin
select * bulk collect into var from table_name;
DBMS_OUTPUT.PUT_LINE(var(1).field); -- Output is City
I want the output of
DBMS_OUTPUT.PUT_LINE(var(1).field); -- Output is XYZ
How can I achieve this?

Answer 1

First of all, your code does not work. Second, if you are going to recover a variable, you don't need bulk collect
Example
create table mytest ( c1 varchar2(50) ;
insert into mytest values ( 'XYZ' );
commit;
Then
SQL> set serveroutput on
declare
vcity mytest.c1%type := 'XYZ';
var mytest.c1%type;
begin
select c1 into var from mytest where c1=vcity;
DBMS_OUTPUT.PUT_LINE('vcity is '||vcity||' ');
DBMS_OUTPUT.PUT_LINE('var is '||var||' ');
end;
/SQL> 2 3 4 5 6 7 8 9
vcity is XYZ
var is XYZ
PL/SQL procedure successfully completed.
SQL>
vcity is just a variable defined with the type of the column c1, but
assigned to a constant, in this case 'XYZ'
var is the variable which I use to recover the value of c1 in the
table, whatever that value is.
You don't need bulk collect here at all.

Answer 2

Assuming you have several cities to list, you need to define a collection to house them once selected, then a variable of that collection. So for example:
--setup
create table table_name ( id integer
, city varchar2(10)
);
insert into table_name(id, city)
select level, 'City #' || trunc(dbms_random.value( 10, 75 ))
from dual connect by level <= 10;
-- process
declare
type city_list is table of table_name%rowtype;
var city_list;
begin
select *
bulk collect
into var
from table_name;
for r in 1 .. var.count
loop
dbms_output.put_line(var(r).city); -- Output is City
end loop;
end;

Answer 3

Let's keep remain mystery about why you want like this,
If I understood you , to achieve what you want you have to specify columns instead of '*' and replace the variable city with column field.
Dbfiddle link for your reference (unable to provide via link through mobile device)
https://dbfiddle.uk/?rdbms=oracle_18&fiddle=20f1a1fff11d4acda7acc701ad120d32
DECLARE
city varchar2(50) := 'XYZ';
TYPE table1_type is table of table1%rowtype;
var table1_type;
BEGIN
select city,field2,field3,field4
bulk collect into var
from table1;
DBMS_OUTPUT.PUT_LINE(var(1).field);
END;
/