Generate test data using Oracle PL/SQL developer

Question

I want to test some schemas and indexes, and I was wondering if there is a functionality in PL/SQL Developer that can generate test data (so I won't have to create sequences and loops to insert data in the tables).

Solution

Loops and PL/SQL aren't always necessary; this trick might be helpful:

insert into emp(id, name, salary)
select rownum, 'Employee ' || to_char(rownum), dbms_random.value(2, 9) * 1000
from dual
connect by level <= 100;

will generate 100 records, named Employee 1 through Employee 100 with random "round" salaries between 2000 and 9000.

The two main techniques are:

1. Use of connect by level <= n to generate n rows in a query on dual.
2. Use of dbms_random package; there's also a very useful function dbms_random.string which can be used -- like its name suggests -- to generate random strings of a certain length containing certain characters.

Comments

[RokX]

DBMS_RANDOM.string('x',10) for strings