Error in Pl/SQL

Question

There are few records in table where value is like ' ` ' ie chr(96). I am written below pl/sql block to see those records in all the columns. But its giving me error as no data found. Please help!!!!
DECLARE
VCOL VARCHAR2(100);
COL_ID VARCHAR2(50);
reg_num varchar2(10);
BEGIN
FOR I IN 1..10 LOOP
begin
select COLUMN_NAME INTO VCOL
FROM user_tab_cols where table_name = 'CASS_REPORT_V7' AND COLUMN_ID = 21;
--DBMS_OUTPUT.PUT_LINE(COL);
SELECT trim(REGISTRATION_NUMBER) into reg_num
FROM CASS_REPORT_V7
where ( trim(VCOL) is not null AND VCOL like chr(96)||'%') ;
DBMS_OUTPUT.PUT_LINE(REG_NUM ||' '|| VCOL);
end;
END LOOP;
EXCEPTION WHEN NO_DATA_FOUND THEN
DBMS_OUTPUT.PUT_LINE('NO DATA FOUND');
END;
Thanks

Answer 1

Take an example :-
CREATE TABLE EMP
EMPNO NUMBER(4),
ENAME VARCHAR2(10 BYTE),
JOB VARCHAR2(30 BYTE),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7,2),
COMM NUMBER(7,2),
DEPTNO NUMBER(2),
DUPLICATE_KEY NUMBER(10)
Insert below few records :-
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7369, 'SMITH', 'CLERK', 7902, TO_Date( '12/17/1980 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 800, NULL, 20, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7499, 'ALLEN', 'SALESMAN', 7698, TO_Date( '02/20/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1600, 300, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7521, 'WARD', 'SALESMAN', 7698, TO_Date( '02/22/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1250, 500, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7566, 'JONES', 'MANAGER', 7839, TO_Date( '04/02/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 2975, NULL, 20, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7654, 'MARTIN', 'SALES ` MAN', 7698, TO_Date( '09/28/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1250, 1400, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7698, 'BLAKE', 'MANAGER', 7839, TO_Date( '05/01/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 2850, NULL, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7782, 'CLARK', 'MANAGER', 7839, TO_Date( '06/09/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 2450, NULL, 10, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7788, 'SCOTT', 'ANALYST', 7566, TO_Date( '04/19/1987 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 3000, NULL, 20, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7839, 'KING', 'PRESIDENT', NULL, TO_Date( '11/17/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 5000, NULL, 10, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7844, 'TURNER', 'SALESMAN', 7698, TO_Date( '09/08/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1500, 0, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7876, 'ADAMS', 'CLER ` K', 7788, TO_Date( '05/23/1987 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1100, NULL, 20, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7900, 'JAMES', 'CLERK', 7698, TO_Date( '12/03/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 950, NULL, 30, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7902, 'FORD', 'A`NALYST', 7566, TO_Date( '12/03/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 3000, NULL, 20, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
7934, 'MILLER', '`CLERK', 7782, TO_Date( '01/23/1982 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1300, NULL, 10, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
1000, 'KING', 'PRE ` SIDENT', NULL, TO_Date( '11/17/1981 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 5000, NULL, 10, NULL);
INSERT INTO EMP ( EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO,DUPLICATE_KEY ) VALUES (
100, 'MILLER', 'CLERK', NULL, TO_Date( '01/23/1982 12:00:00 AM', 'MM/DD/YYYY HH:MI:SS AM')
, 1300, NULL, 10, 1);
commit;
Then Query with following :- and see the results :-
SELECT JOB ABC FROM EMP WHERE JOB LIKE '%`%' ;
Output is :-
1. SALES ` MAN
2. CLER ` K
3. A`NALYST
4. `CLERK
5. PRE ` SIDENT
This is an example of One table, I need to check in all the column in a table and all the table in one schema.
For this written on pl/sql block, check this:-
Set serveroutput on
DECLARE
VCOL VARCHAR2(100);
COL_ID VARCHAR2(50);
reg_num varchar2(100);
BEGIN
FOR I IN 1..10 LOOP
begin
select COLUMN_NAME INTO VCOL
FROM user_tab_cols where 1=1
and table_name = 'EMP'
AND COLUMN_ID = 3;
DBMS_OUTPUT.PUT_LINE(VCOL);
SELECT trim(VCOL) into reg_num FROM EMP where VCOL like '%`%' ;
DBMS_OUTPUT.PUT_LINE(REG_NUM ||' '|| VCOL);
end;
END LOOP;
EXCEPTION WHEN NO_DATA_FOUND THEN
DBMS_OUTPUT.PUT_LINE('NO DATA FOUND');
END;
check at run time its giving no error found:-
Let me know where exactly i am wrong.
Thanks in adv.