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SQL> -- create demo table
SQL> create table Employee(
2 ID VARCHAR2(4 BYTE) NOT NULL,
3 First_Name VARCHAR2(10 BYTE),
4 Last_Name VARCHAR2(10 BYTE),
5 Start_Date DATE,
6 End_Date DATE,
7 Salary Number(8,2),
8 City VARCHAR2(10 BYTE),
9 Description VARCHAR2(15 BYTE)
10 )
11 /
Table created.
SQL>
SQL> -- prepare data
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('02','Alison', 'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('03','James', 'Smith', to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('04','Celia', 'Rice', to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('05','Robert', 'Black', to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('06','Linda', 'Green', to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('07','David', 'Larry', to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager')
3 /
1 row created.
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)
2 values('08','James', 'Cat', to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester')
3 /
1 row created.
SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> select * from Employee
2 /
ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION
---- -------------------- -------------------- --------- --------- ---------- ---------- ---------------
01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer
02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester
03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester
04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager
05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester
06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester
07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager
08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester
8 rows selected.
SQL>
SQL>
SQL>
SQL> create or replace type emp2_oty is object (empNo NUMBER,eName VARCHAR2(10))
2 /
SQL>
SQL> create or replace type emp2_nt is table of emp2_oty
2 /
Type created.
SQL>
SQL> create or replace function f_getEmps_nt(i_deptNo number, i_hireDate DATE)
2 return emp2_nt
3 is
4 v_emp2_nt emp2_nt:=emp2_nt();
5 cursor c_emp is select * from employee;
6 begin
7 for r_emp in c_emp
8 loop
9 if i_deptNo is null then
10 if i_hireDate is null or to_char(i_hireDate,'mm')= to_char(r_emp.start_Date,'mm')
11 then
12 v_emp2_nt.extend;
13 v_emp2_nt(v_emp2_nt.last):= emp2_oty(r_emp.id, r_emp.first_Name);
14 end if;
15 elsif i_deptNo=r_emp.id then
16 v_emp2_nt.extend;
17 v_emp2_nt(v_emp2_nt.last):= emp2_oty(r_emp.id, r_emp.first_name);
18 end if;
19 end loop;
20 return v_emp2_nt;
21 end;
22 /
Function created.
SQL>
SQL> declare
2 v_temp_nt emp2_nt;
3 begin
4 v_temp_nt:=f_getEmps_nt(20,null);
5 DBMS_OUTPUT.put_line('Received:'||v_temp_nt.count);
6
7 v_temp_nt:=f_getEmps_nt(null,sysdate);
8 DBMS_OUTPUT.put_line('Received:'||v_temp_nt.count);
9
10 v_temp_nt:=f_getEmps_nt(null,null);
11 DBMS_OUTPUT.put_line('Received:'||v_temp_nt.count);
12 end;
13 /
Received:0
Received:0
Received:8
PL/SQL procedure successfully completed.
SQL>
SQL> --Or
SQL>
SQL> select F_GETEMPS_NT (10,null) from dual
2 /
F_GETEMPS_NT(10,NULL)(EMPNO, ENAME)
----------------------------------------
EMP2_NT()
SQL>
SQL> drop type emp2_nt;
Type dropped.
SQL>
SQL> drop type emp2_oty;
Type dropped.
SQL>
SQL> -- clean the table
SQL> drop table Employee
2 /
Table dropped.
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