Use 'execute immediate' to run a insert statement : Execute immediate « PL SQL Statements « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. PL SQL Statements
3. Execute immediate

SQL>
SQL> create table t ( x int );

Table created.

SQL>
SQL> alter session set sql_trace=true;

Session altered.

SQL>
SQL> begin
  2      for i in 1 .. 1000
  3      loop
  4          execute immediate 'insert into t values ( ' || i || ')';
  5      end loop;
  6  end;
  7  /

PL/SQL procedure successfully completed.

SQL>
SQL> drop table t;

Table dropped.

SQL>