Explicit Attribute : Cursor ISOPEN « Cursor « Oracle PL / SQL






Explicit Attribute

    
SQL> CREATE TABLE emp (
  2    id         NUMBER PRIMARY KEY,
  3    fname VARCHAR2(50),
  4    lname  VARCHAR2(50)
  5  );

Table created.

SQL>
SQL> INSERT INTO emp (id, fname, lname)VALUES (1, 'A', 'B');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (2, 'C', 'D');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (3, 'Enn', 'F');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (4, 'G', 'H');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (5, 'G', 'Z');

1 row created.

SQL>
SQL>
SQL> CREATE TABLE book (
  2    isbn      CHAR(10) PRIMARY KEY,
  3    category  VARCHAR2(20),
  4    title     VARCHAR2(100),
  5    num_pages NUMBER,
  6    price     NUMBER,
  7    copyright NUMBER(4),
  8    emp1   NUMBER,
  9    emp2   NUMBER,
 10    emp3   NUMBER
 11  );

Table created.

SQL>
SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
  2             VALUES ('1', 'Database', 'Oracle', 563, 39.99, 2009, 1, 2, 3);

1 row created.

SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2)
  2             VALUES ('2', 'Database', 'MySQL', 765, 44.99, 2009, 4, 5);

1 row created.

SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3)
  2             VALUES ('3', 'Database', 'SQL Server', 404, 39.99, 2001, 6, 7, 8);

1 row created.

SQL>
SQL> SET SERVEROUTPUT ON ESCAPE OFF
SQL>
SQL> DECLARE
  2
  3     fnameValue emp.fname%TYPE;
  4     lnameValue emp.lname%TYPE;
  5     v_row_count PLS_INTEGER := 0;
  6     v_book_count PLS_INTEGER := 0;
  7
  8     CURSOR auth_cur IS
  9        SELECT a.fname, a.lname, count(b.title)
 10        FROM emp a, book b
 11        GROUP BY a.fname, a.lname
 12        HAVING count(b.title) > 0
 13        ORDER BY a.lname;
 14
 15  BEGIN
 16     DBMS_OUTPUT.ENABLE(1000000);
 17     OPEN auth_cur;
 18     LOOP
 19        FETCH auth_cur INTO fnameValue, lnameValue, v_book_count;
 20        EXIT WHEN auth_cur%NOTFOUND;
 21
 22        
 23        v_row_count := auth_cur%ROWCOUNT;
 24        DBMS_OUTPUT.PUT_LINE(v_row_count||' rows processed so far');
 25
 26        DBMS_OUTPUT.PUT_LINE(lnameValue||','||fnameValue||' wrote '||v_book_count||' book(s).');
 27     END LOOP;
 28     CLOSE auth_cur;
 29     IF auth_cur%ISOPEN = FALSE
 30     THEN
 31        DBMS_OUTPUT.PUT_LINE('Cursor closed');
 32     ELSE
 33        DBMS_OUTPUT.PUT_LINE('The cursor is still open');
 34     END IF;
 35
 36  EXCEPTION
 37     WHEN OTHERS
 38        THEN
 39        DBMS_OUTPUT.PUT_LINE(SQLERRM);
 40  END;
 41  /
1 rows processed so far
B,A wrote 3 book(s).
2 rows processed so far
D,C wrote 3 book(s).
3 rows processed so far
F,Enn wrote 3 book(s).
4 rows processed so far
H,G wrote 3 book(s).
5 rows processed so far
Z,G wrote 3 book(s).
Cursor closed

PL/SQL procedure successfully completed.

SQL> drop table emp;

Table dropped.

SQL> drop table book;

Table dropped.

SQL>

   
    
    
    
  








Related examples in the same category

1.Cursor isopen property