Use For loop to output data in a PL/SQL table of cursor : LOOP « Cursor « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
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Oracle PL/SQL Tutorial » Cursor » LOOP 
25. 5. 2. Use For loop to output data in a PL/SQL table of cursor
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('20060725','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('19860221','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('19900315','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('19990421','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('19980808','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('19960104','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('19980212','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('20020415','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> SET ECHO ON
SQL> SET SERVEROUTPUT ON
SQL>
SQL> DECLARE
  2      CURSOR all_emps IS
  3          SELECT *
  4          FROM employee
  5          ORDER BY first_name;
  6
  7      TYPE emp_table IS TABLE OF employee%ROWTYPE;
  8
  9      emps emp_table;
 10      emps_max PLS_INTEGER;
 11      inx1 PLS_INTEGER;
 12  BEGIN
 13      emps_max := 0;
 14
 15      emps := emp_table ();
 16
 17      FOR emp IN all_emps LOOP
 18          emps_max := emps_max + 1;
 19          emps.extend;
 20          emps(emps_max).id := emp.id;
 21          emps(emps_max).first_name := emp.first_name;
 22          emps(emps_max).salary := emp.salary;
 23      END LOOP;
 24
 25      emps.extend(5,1);
 26
 27      FOR inx1 IN 1..emps_max+LOOP
 28          DBMS_OUTPUT.PUT_LINE(emps(inx1).id ||' ' || emps(inx1).first_name);
 29      END LOOP;
 30      emps.trim(5);
 31
 32      emps.delete(1);
 33
 34      DBMS_OUTPUT.PUT_LINE(emps.count);
 35
 36      FOR inx1 IN 1..emps_max+LOOP
 37          IF emps.exists(inx1THEN
 38              DBMS_OUTPUT.PUT_LINE (emps(inx1).id ||' ' || emps(inx1).first_name);
 39          END IF;
 40      END LOOP;
 41  END;
 42  /
02 Alison
04 Celia
07 David
03 James
08 James
01 Jason
06 Linda
05 Robert
02 Alison
02 Alison
02 Alison
02 Alison
02 Alison
7
04 Celia
07 David
03 James
08 James
01 Jason
06 Linda
05 Robert

PL/SQL procedure successfully completed.

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

Table dropped.

SQL>
SQL>
SQL>
25. 5. LOOP
25. 5. 1. A loop is required is to read each row in cursor returned
25. 5. 2. Use For loop to output data in a PL/SQL table of cursor
25. 5. 3. Placing cursors in nested loops
25. 5. 4. Exit a LOOP when cursor%NOTFOUND
25. 5. 5. LOOP..END LOOP Cursor Loop
25. 5. 6. WHILE..LOOP Cursor Loop
25. 5. 7. Cursor FOR Loop
25. 5. 8. Loop till exit when cursorName%notfound
25. 5. 9. for data in ( select * from tableName )
25. 5. 10. while cursorName%found, loop
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