Two identical queries to demonstrate the impact of changes : Cursor Value « Cursor « Oracle PL / SQL

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Oracle PL / SQL » Cursor » Cursor Value 
Two identical queries to demonstrate the impact of changes
    
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');

row created.

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

row created.

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

row created.

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

row created.

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

row created.

SQL>
SQL>
SQL> SET SERVEROUTPUT ON ESCAPE OFF
SQL>
SQL> DECLARE
  2
  3     fnameValue emp.fname%TYPE;
  4
  5     
  6
  7     CURSOR emp_cur1 IS SELECT fname FROM emp WHERE fname like 'Ron%';
  8
  9     CURSOR emp_cur2 IS SELECT fname FROM emp WHERE fname like 'Ron%';
 10
 11  BEGIN
 12
 13     OPEN emp_cur1;
 14     UPDATE emp SET fname = 'AAA' WHERE fname = 'Ron';
 15
 16     OPEN emp_cur2;
 17
 18     FETCH emp_cur1 INTO fnameValue;
 19     DBMS_OUTPUT.PUT_LINE(fnameValue);
 20
 21     FETCH emp_cur2 INTO fnameValue;
 22     DBMS_OUTPUT.PUT_LINE(fnameValue);
 23
 24     CLOSE emp_cur1;
 25     CLOSE emp_cur2;
 26
 27     ROLLBACK;
 28
 29  END;
 30  /

PL/SQL procedure successfully completed.

SQL> drop table emp;

Table dropped.

   
    
    
    
  
Related examples in the same category
1. Cursor with a single value
2. Update statement with cursor variable
3. Server-side cursor variables.
4. A cursor FOR loop.
5. Cursor Variable Example 2
6. Read full table data from a cursor
7. Single column cursor
8. Use Complex cursor to simplify the pl/sql logic
9. Use cursor to do full table scan
10. Use data referenced by cursor to update table
11. Use number functions when creating a cursor value
12. Form sentences from database data
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