Changes in PL/SQL Code

Question

Hi all,
I have the code below and I want to change it according to the questions A and B.
I am new to PL/SQL and I do not undestand the terminology properly. Any sugestion of how to change the code to match question a and b are very welcome.
a. Declare an INDEX BY table dept_table_type of type
departments.department_name. Declare a variable my_dept_table of type
dept_table_type to temporarily store the name of the departments.
b. Declare two variables: loop_count and deptno of type NUMBER. Assign 10 to
loop_count and 0 to deptno.
DECLARE
TYPE departments_table IS TABLE OF departments%ROWTYPE INDEX BY BINARY_INTEGER;
depart departments_table;
BEGIN
SELECT *
BULK COLLECT INTO depart
FROM departments;
FOR i IN depart.FIRST..depart.LAST
LOOP
DBMS_OUTPUT.PUT_LINE(to_char(depart(i).department_id));
END LOOP;
END;
Thank you very much in advance!!!

Answer 1

899335 wrote:
Hi all,
I have the code below and I want to change it according to the questions A and B.
I am new to PL/SQL and I do not undestand the terminology properly. Any sugestion of how to change the code to match question a and b are very welcome.
a. Declare an INDEX BY table dept_table_type of type
departments.department_name. Declare a variable my_dept_table of type
dept_table_type to temporarily store the name of the departments.The type will be very similar to the INDEX BY table called departments_table. The main difference is that each row in a departments table is a
departments%ROWTYPE, but each row in a dept_table_type will be a
departments.department_name%TYPE.
The variable my_dept_table will be very similar to the existing variable dept_table.
By the way, it would be better to use consistent names for the types and variables.
Departments_type would be a better name than departments _table for the type , since it is a TYPE, not a TABLE.
If the column in the table is called department_iname, then department_name_type would be a better name than dept_table_type. You're not abbreviating department in other places, so don't do it here. This type only deals with the deparatment_name column, not the entire row.
My departments_table and my_department_name_table would be better names than depart and my_dept_table.
b. Declare two variables: loop_count and deptno of type NUMBER. Assign 10 to
loop_count and 0 to deptno.You can declare a NUMBER variable anywhen in the DECLARE section, and assign a value to it in the BEGIN section, like this
DECLARE
    x   NUMBER;
BEGIN
    x := 10;
    ...You can also declare a variable and assign a value to it at the same time, in the DECALRE section, like this:
DECLARE
    y   NUMBER := 0;
    ...