Mega Code Archive
Indexing Associative Arrays
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Generate a list of employees grouped by two parameters
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> -- 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> declare
2 type list_aa is table of VARCHAR2(2000) index by VARCHAR2(256);
3 v_list_aa list_aa;
4
5 cursor c_dept is select id from employee;
6 cursor c_emp is select first_name, id,to_char(start_Date,'q') q_nr from employee;
7 v_subscript_tx VARCHAR2(256);
8 begin
9 for r_dept in c_dept loop
10 v_list_aa(r_dept.id||'|1'):='Q1 Dept#' ||r_dept.id||':';
11 v_list_aa(r_dept.id||'|2'):='Q2 Dept#' ||r_dept.id||':';
12 v_list_aa(r_dept.id||'|3'):='Q3 Dept#' ||r_dept.id||':';
13 v_list_aa(r_dept.id||'|4'):='Q4 Dept#' ||r_dept.id||':';
14 end loop;
15
16 for r_emp in c_emp loop
17 v_list_aa(r_emp.id||'|'||r_emp.q_nr):= v_list_aa(r_emp.id||'|'||r_emp.q_nr)|| ' '||r_emp.first_Name;
18 end loop;
19
20 v_subscript_tx:=v_list_aa.first;
21 loop
22 DBMS_OUTPUT.put_line(v_list_aa(v_subscript_tx));
23 v_subscript_tx:=v_list_aa.next(v_subscript_tx);
24 exit when v_subscript_tx is null;
25 end loop;
26 end;
27 /
Q1 Dept#01:
Q2 Dept#01:
Q3 Dept#01: Jason
Q4 Dept#01:
Q1 Dept#02: Alison
Q2 Dept#02:
Q3 Dept#02:
Q4 Dept#02:
Q1 Dept#03:
Q2 Dept#03:
Q3 Dept#03:
Q4 Dept#03: James
Q1 Dept#04:
Q2 Dept#04:
Q3 Dept#04:
Q4 Dept#04: Celia
Q1 Dept#05: Robert
Q2 Dept#05:
Q3 Dept#05:
Q4 Dept#05:
Q1 Dept#06:
Q2 Dept#06:
Q3 Dept#06: Linda
Q4 Dept#06:
Q1 Dept#07:
Q2 Dept#07:
Q3 Dept#07:
Q4 Dept#07: David
Q1 Dept#08:
Q2 Dept#08:
Q3 Dept#08: James
Q4 Dept#08:
PL/SQL procedure successfully completed.
SQL>
SQL> -- clean the table
SQL> drop table Employee
2 /
Table dropped.
SQL>
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