Examine the structure of the EMP table:
Name Null? Type
—————— ————– ———————
EMPNO NOT NULL NUMBER (4)
ENAME VARCHAR2 (10) SAL NUMBER (7, 2)
Examine this code:
Which code should be inserted to display the collection contents?
A. 1_indx := 1_list.FIRST;
WHILE (1_indx IS NOT NULL) LOOP
DBMS_OUTPUT.PUT_LINE (1_indx || ‘ ‘ || 1_list (1_indx));
1_indx := 1_emp.NEXT (1_indx); END LOOP;
B. FOR indx IN 1_list. COUNT .. -1 LOOP
DBMS_OUTPUT.PUT_LINE (indx | | ‘ ‘ | | 1_list (indx));
END LOOP;
C. FOR indx IN -1 .. 1_list.LIMIT LOOP
DBMS_OUTPUT.PUT_LINE (indx | | ‘ ‘ | | 1_list (indx) );
END LOOP;
D. FOR indx IN 1_list.FIRST . . 1_list.LAST LOOP
DBMS_OUTPUT.PUT_LINE (indx | | ‘ ‘ | | 1_list (indx)); END LOOP;
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only D
declare
type list_typ is table of number index by PLS_INTEGER ;
l_LIST list_typ;
l_indx number ;
begin
select SAL bulk collect into l_list from emp;
for indx in l_list.first .. l_list.last loop
if l_list(indx)<1000 then
l_list(indx*-1) := l_list(indx);
l_list.delete(indx);
end if;
end loop;
FOR indx IN l_list.FIRST .. l_list.LAST LOOP
DBMS_OUTPUT.PUT_LINE (indx ||' '|| l_list (indx)); END LOOP;
end;
A
A:
l_index := l_list.first;
while l_index is not null
loop
dbms_output.put_line(l_index || ‘ ‘ || l_list(l_index));
l_index := l_list.next(l_index);
end loop;
D will fail on missing 0 array index l_list(0)
D
A. Failed with
ORA-06550: line 20, column 13:
PLS-00201: identifier ‘L_EMP.NEXT’ must be declared
clear code
l_indx := l_list.FIRST;
WHILE (l_indx IS NOT NULL) LOOP
DBMS_OUTPUT.PUT_LINE (l_indx || ‘ ‘ || l_list (l_indx));
l_indx := l_list.NEXT (l_indx);
END LOOP;
A