DECLARE
ddl_qry VARCHAR2 (150);
tbname varchar2(100);
col1 varchar2(50);
dtype1 varchar2(50);
scale1 varchar2(10);
col2 varchar2(50);
dtype2 varchar2(50);
scale2 varchar2(10);

BEGIN

tbname := :P3_NEW_6;
col1 := :P3_NEW;
dtype1 := :P3_NEW_1;
scale1 := :P3_NEW_4;
col2 := :P3_NEW_2;
dtype2 := :P3_NEW_3;
scale2 := :P3_NEW_5;

ddl_qry := 'CREATE TABLE tbname(
col1 dtype1(scale1),
col2 dtype2(scale2)
)';
EXECUTE IMMEDIATE ddl_qry;
END;

sir my syntax is ok but when press create button then show error

Error: Ajax call returned server error ORA-00907: missing right parenthesis for Execute PL/SQL Code.