Introduction to Relational Databases
It's hard to do any significant enterprise-level development without using a relational database. This chapter gives you a quick overview of how to organize data in a database and how to use the Structured Query Language (SQL) to manipulate the database. If you already understand databases and SQL, you might want to skip to Chapter 3, "JDBC—The Java Database API."
When you use a relational database, you organize your data into two-dimensional tables. The columns of the table represent individual pieces of data: numbers, strings, dates, and so on. Within a particular table, each column must have a unique name, but you can use the same column names in different tables. All the column values in a single row in ...
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