The PostgreSQL Global Development Group &legal; Welcome to PostgreSQL and the PostgreSQL Tutorial. The following few chapters are intended to give a simple introduction to PostgreSQL, relational database concepts, and the SQL language to those who are new to any one of these aspects. We only assume some general knowledge about how to use computers. No particular Unix or programming experience is required. After you have worked through this tutorial you might want to move on to reading the User's Guide]]>]]> to gain a more formal knowledge of the SQL language, or the Programmer's Guide]]>]]> for information about developing applications for PostgreSQL. We hope you have a pleasant experience with PostgreSQL. &start; &query; &advanced;