Dynamic sql for select statement

Question

Hi,
Please help me with the below code:
It is updating null if the select statment returns one values. If it fetches multiple values then it throughs the below error msg when running the program.
Please let me know how to modify the below code. Or let me know is there anyother way to write this code.
Logic for development:
* View name should be passed as dynamic.
CREATE OR REPLACE
PROCEDURE "PKEP_LOAD_SO_EU" (p_var1 IN VARCHAR2)
IS
lv_sql VARCHAR2 (4000);
lv_name VARCHAR2 (20);
BEGIN
lv_sql :=
' SELECT DISTINCT LEVEL2
FROM BIIO_SALES_OB_IMPORT_'|| p_var1;
EXECUTE IMMEDIATE lv_sql
INTO lv_name;
BEGIN
UPDATE BIIO_SALES_OB_IMPORT_NA2 --table name for updation
SET SOB_1 = NULL,
SOB_DATE_1 = NULL
WHERE level2 = lv_name; -- validation ( eg. Select distinct level2 from biio_sales_ob_import_'||p_var1)
COMMIT;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line (SQLERRM);
NULL;
END;
END;
BEGIN
PKEP_LOAD_SO_EU ('NA1');
end;
Error report:
ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at "DEMANTRA.PKEP_LOAD_SO_EU", line 11
ORA-06512: at line 2
01422. 00000 - "exact fetch returns more than requested number of rows"
*Cause:    The number specified in exact fetch is less than the rows returned.
*Action:   Rewrite the query or change number of rows requested
Thanks.
Padma

Answer 1

Padu wrote:
Please let me know whether is anyother way to write this code as im a beginner for SQl.You dont need to have a seperate SELECT statement. Just a single UPDATE will do the job for you.
create or replace procedure pkep_load_so_eu
   p_var1 in varchar2
as
begin
   lSql := ' update biio_sales_ob_import_na2               ' ||
           '    set sob_1      = null                    ' ||
        '      , sob_date_1 = null                    ' ||
        '  where level2 in (                         ' ||
        '                    select level2               ' ||
        '                      from biio_sales_ob_import_'       || p_var1 ||
   execute immediate lSql;
end;