Use cursor to store the row count : Explicit Cursor « Cursor « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Cursor
  3. Explicit Cursor

Use cursor to store the row count

  
SQL>
SQL> CREATE TABLE lecturer (
  2    id               NUMBER(5) PRIMARY KEY,
  3    first_name       VARCHAR2(20),
  4    last_name        VARCHAR2(20),
  5    major            VARCHAR2(30),
  6    current_credits  NUMBER(3)
  7    );

Table created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10001, 'Scott', 'Lawson','Computer Science', 11);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits)
  2                VALUES (10002, 'Mar', 'Wells','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10003, 'Jone', 'Bliss','Computer Science', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10004, 'Man', 'Kyte','Economics', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10005, 'Pat', 'Poll','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10006, 'Tim', 'Viper','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10007, 'Barbara', 'Blues','Economics', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10008, 'David', 'Large','Music', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10009, 'Chris', 'Elegant','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10010, 'Rose', 'Bond','Music', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10011, 'Rita', 'Johnson','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10012, 'Sharon', 'Clear','Computer Science', 3);

1 row created.

SQL>
SQL>
SQL>
SQL> declare
  2       l_emp_count number;
  3       i number; -- We will use this as our counter
  4
  5       CURSOR cursorValue IS
  6       select count(*)
  7       from lecturer;
  8       begin
  9       OPEN cursorValue;
 10       FETCH cursorValue INTO l_emp_count;
 11
 12       FOR i IN 1 .. l_emp_count LOOP
 13       dbms_output.put_line('Employee ' || i);
 14       END LOOP;
 15
 16       CLOSE cursorValue;
 17  end;
 18  /
Employee 1
Employee 2
Employee 3
Employee 4
Employee 5
Employee 6
Employee 7
Employee 8
Employee 9
Employee 10
Employee 11
Employee 12

PL/SQL procedure successfully completed.

SQL>
SQL> drop table lecturer;

Table dropped.

SQL>
SQL>
SQL>








Related examples in the same category

1.Explicit Cursor Demo
2.Implicit and Explicit Cursors
3.an explicit cursor that selects data
4.An explicit cursor fetch loop.
5.Column value indexed cursor
6.Combine for loop and if statement to check the value in cursor
7.Cursor performance
8.Delete from table where current of cursor
9.If statement and single piece value in cursor
10.Use explicit cursor to fetch and store value to number variable
11.Write an explicit cursor in a FOR loop and use the data