Index by string : Associative Arrays « Collections « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
1. Introduction
2. Query Select
3. Set
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5. Sequences
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Oracle PL/SQL Tutorial » Collections » Associative Arrays 
26. 7. 4. Index by string
SQL>
SQL> -- create demo table
SQL> create table Employee(
  2    ID                 VARCHAR2(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('20060
725','YYYYMMDD'), 1234.56'Toronto',  'Programmer')
  3  /

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('19860
221','YYYYMMDD'), 6661.78'Vancouver','Tester')
  3  /

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('19900
315','YYYYMMDD'), 6544.78'Vancouver','Tester')
  3  /

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('19990
421','YYYYMMDD'), 2344.78'Vancouver','Manager')
  3  /

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('19980
808','YYYYMMDD'), 2334.78'Vancouver','Tester')
  3  /

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('19960
104','YYYYMMDD'), 4322.78,'New York',  'Tester')
  3  /

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('19980
212','YYYYMMDD'), 7897.78,'New York',  'Manager')
  3  /

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('20020
415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester')
  3  /

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

rows selected.

SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE myProc
  2  AS
  3  CURSOR ccur IS SELECT first_name, city FROM employee;
  4  TYPE nametab IS TABLE OF employee.first_name%type
  5  INDEX BY employee.city%type;
  6  ch nametab;
  7  i integer := 0;
  8  imax integer;
  9  BEGIN
 10    FOR j IN ccur LOOP
 11    /*  i := i + 1;   */
 12      ch(j.first_name:= j.first_name;
 13    END LOOP;
 14    /* imax := i;
 15    i := 0;
 16    dbms_output.put_line('number of values read: '||imax); */
 17    dbms_output.put_line('Name ... '||ch('Vancouver'));
 18  END myProc;
 19  /



SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /

Table dropped.

SQL>
SQL>
SQL>
SQL>
26. 7. Associative Arrays
26. 7. 1. Associative Arrays demo
26. 7. 2. Associative arrays (index-by tables)
26. 7. 3. PL/SQL Table
26. 7. 4. Index by string
26. 7. 5. Nested Table with Table row elements inside
26. 7. 6. Assign value to PL/SQL table
26. 7. 7. TABLE.Exist
26. 7. 8. Clear the salaries table by assigning the empty version to it
26. 7. 9. Place some values into the salaries table
26. 7. 10. PL/SQL table of cursor
26. 7. 11. Select data into PL/SQL table of cursor
26. 7. 12. Use For loop to output data in a PL/SQL table of cursor
26. 7. 13. Use for all loop to loop through the PL/SQL table
26. 7. 14. Change PL/SQL table element by index
26. 7. 15. Insert data in PL/SQL table to a real table
26. 7. 16. The COUNT Table Attribute
26. 7. 17. Uses the COUNT method to display the number of rows contained in an index-by table
26. 7. 18. The DELETE Table Attribute
26. 7. 19. The EXISTS Table Attribute
26. 7. 20. FIRST and LAST Table Attributes
26. 7. 21. NEXT and PRIOR Table Attributes
26. 7. 22. Using INDEX BY BINARY_INTEGER
26. 7. 23. Indexing Associative Arrays
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