Invalid relational operator error

Question

Dear All,
When i try to run the below query i am getting Invlid relational operator. Please help me on the below issue
Declare
lv_number VARCHAR2(2000);
lv_count NUMBER;
BEGIN
For I IN (select emp_no from emp where rownum < 2) Loop
lv_number := ',' ||i.emp_no||lv_number;
ENd Loop;
dbms_output.put_line(substr(lv_number,2));
lv_number := ' IN ( '|| substr(lv_number,2)|| ')';
dbms_output.put_line(lv_number);
select Count(1)
INTO lv_count
FROM emp
where emp_no|| lv_number ;
-- The above logic written to achive my requirement
END ;

Answer 1

You need to use dynamic SQL:
Declare
    lv_number VARCHAR2(2000);
    lv_count NUMBER;
BEGIN
    For I IN (select empno from emp where rownum < 2) Loop
      lv_number := ',' ||i.empno||lv_number;
    ENd Loop;
    dbms_output.put_line(substr(lv_number,2));
    lv_number := ' IN ( '|| substr(lv_number,2)|| ')';
    dbms_output.put_line(lv_number);
    EXECUTE IMMEDIATE 'select  Count(1)
      FROM emp
      where empno' || lv_number
      INTO  lv_count;
    dbms_output.put_line('COUNT = ' || lv_count);
END;
7369
IN ( 7369)
COUNT = 1
PL/SQL procedure successfully completed.
SQL> SY.