To get the best results, you need to provide SQL Data Generator with some hints on how the data ought to look. Phil Factor nudges it towards realistic text data. Read more

Generating realistic dates using SQL Data Generator and Python

How to generate more realistic dates, in your SQL Server test data. Read more

SQL Data Generator
SQL Toolbelt
Generating Realistic Test Data
Database Testing

Generating test data with localized addresses using SQL Data Generator

With basic grasp of regex expressions, a tool like SQL Data Generator can generate test data with addresses that are realistic for your part of the world. Read more