PL/SQL Cursor Exercises: Show the uses of a variable in explicit cursor query, and no result set is affected despite that value of the variable is incremented after every fetch
PL/SQL Cursor: Exercise-27 with Solution
Write a PL/SQL block to show the uses of a variable in explicit cursor query, and no result set is affected despite that value of the variable is incremented after every fetch.
DECLARE emp_sal employees.salary%TYPE; sal_twise employees.salary%TYPE; newvar INTEGER := 2; CURSOR cur1 IS SELECT salary, salary * newvar FROM employees WHERE job_id LIKE 'PU_%'; BEGIN OPEN cur1; LOOP FETCH cur1 INTO emp_sal, sal_twise; EXIT WHEN cur1%NOTFOUND; dbms_output.Put_line('When value of the variable: ' || newvar); dbms_output.Put_line('Salary: ' || emp_sal); dbms_output.Put_line('Twise of Salary: ' || sal_twise); newvar := newvar + 1; END LOOP; CLOSE cur1; END; /
SQL> / When value of the variable: 2 Salary: 3100 Twise of Salary: 6200 When value of the variable: 3 Salary: 2900 Twise of Salary: 5800 When value of the variable: 4 Salary: 2800 Twise of Salary: 5600 When value of the variable: 5 Salary: 2600 Twise of Salary: 5200 When value of the variable: 6 Salary: 2500 Twise of Salary: 5000 When value of the variable: 7 Salary: 11000 Twise of Salary: 22000 PL/SQL procedure successfully completed.
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