Printing the value of a variable in SQL Developer

Question

I wanted to print the value of a particular variable which is inside an anonymous block. I am using Oracle SQL Developer. I tried using dbms_output.put_line. But it is not working. The code which I am using is shown below.

SET SERVEROUTPUT ON  DECLARE    CTABLE USER_OBJECTS.OBJECT_NAME%TYPE;   CCOLUMN ALL_TAB_COLS.COLUMN_NAME%TYPE;   V_ALL_COLS VARCHAR2(500);    CURSOR CURSOR_TABLE     IS     SELECT OBJECT_NAME      FROM USER_OBJECTS      WHERE OBJECT_TYPE='TABLE'     AND OBJECT_NAME LIKE 'tb_prm_%';    CURSOR CURSOR_COLUMNS (V_TABLE_NAME IN VARCHAR2)     IS     SELECT COLUMN_NAME     FROM ALL_TAB_COLS     WHERE TABLE_NAME = V_TABLE_NAME;  BEGIN    OPEN CURSOR_TABLE;    LOOP     FETCH CURSOR_TABLE INTO CTABLE;     EXIT WHEN CURSOR_TABLE%NOTFOUND;      OPEN CURSOR_COLUMNS (CTABLE);      V_ALL_COLS := NULL;      LOOP       FETCH CURSOR_COLUMNS INTO CCOLUMN;       V_ALL_COLS := V_ALL_COLS || CCOLUMN;       IF CURSOR_COLUMNS%FOUND THEN         V_ALL_COLS := V_ALL_COLS || ', ';       ELSE         EXIT;       END IF;     END LOOP;      DBMS_OUTPUT.PUT_LINE(V_ALL_COLS);    END LOOP;   CLOSE CURSOR_TABLE;  END; 

And I am getting the output only as anonymous block completed.

Answer 1

You need to turn on dbms_output. In Oracle SQL Developer:

1. Show the DBMS Output window (View->DBMS Output).
2. Press the "+" button at the top of the Dbms Output window and then select an open database connection in the dialog that opens.

In SQL*Plus:

 SET SERVEROUTPUT ON