dbms_random是Oracle数据库提供的一个随机函数包。

```sql
BEGIN
dbms_random.initialize(8);
dbms_random.seed('test');
END;
/
select dbms_random.string('U', 5) from dual;
select dbms_random.string('P', 2) from dual;
select dbms_random.string('x', 4) from dual;
select dbms_random.string('a', 2) from dual;
select dbms_random.string('l', 3) from dual;
select dbms_random.normal() from dual;
select dbms_random.normal() from dual;
select dbms_random.value() from dual;
select dbms_random.value(10, 15) from dual;

BEGIN
dbms_random.terminate();
END;
/
```